Contents tagged with NuGet
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Automatically Publishing NuGet packages from GitHub
About an hour ago I didn’t have a MyGet account (although I knew about the service) but did have a repository on GitHub with a package that I was manually updating and pushing to NuGet. Thanks to a recommendation from Phil Haack and an hour of messing around with some files I now have a push to GitHub updating my NuGet package with a click of a button. Dead simple. Read on to get your own setup working.
I’m currently in the midst of a reboot of Terrarium, a .NET learning tool that lets you build creatures that survive in an online ecosystem. More on that later but right now I’ve setup a NuGet package that you add to your own creation to get all the functionality of a creature in Terrarium. The problem was is that I was manually editing a batch file every time I built a new version and pushing that build up to NuGet.
This is 2014. There must be a better way. We have the technology. We have the capability to make this process easy.
Thanks to a few tweets and one suggestion from Phil Haack I checked out MyGet. At first it didn’t look like what I wanted to do. I didn’t want package hosting, I wanted to build my package from GitHub and publish it to NuGet. After looking at a few pages I realized that MyGet was really a perfect way to setup “test” packages. Packages I could push and push and push and never make public then with the click of a button publish the version from MyGet upstream to NuGet. In addition to a few pages of documentation on MyGet I stumbled over Xavier Decoster’s blog post on how he does it with his ReSharper Razor extension. The post was good and had enough steps to get me going. The MyGet docs are there but the screenshots and some of the steps are a little obscure (and didn’t always match what I was seeing in my browser) so hopefully this post will clear things up and give you a detailed step-by-step on how to do this (with the current version of MyGet, it may change in the future).
What You’ll Need
You’re going to need a few things setup first for this to work:
- A GitHub repository. BitBucket is also supported as well as others but I’ll document GitHub here. Check out the MyGet documentation on what they support.
- A MyGet account. I hadn’t signed up for one until about an hour ago so this is easy (and free!)
- A NuGet account.
- A .nuspec file for your project (we’ll create it in this post)
- A batch file to build your package (again, we’ll create it later)
MyGet Feed
You’re going to need to create a MyGet feed first before anything. So once you have an account you’ll add a feed. There are various places on MyGet to add one (and I think once you verify your account you’re thrown into the screen to create one). In the top login bar next to your name you’ll see a file icon that says “New Feed”
There’s also a “New Feed” button in the Your Feeds box on your activity stream page.
Once you click it you’ll be taken to a page where you enter the details of your new feed.
Enter a name for the feed. The first part of the URL is already filled in for you but you specify whatever you want. This will be your URL that you’ll enter into the Package Manager to consume your feed. You can also enter a description here.
Next you get to determine how your feed is to be used. By default it’s public but you can also create a community feed (where anyone can push and manage their own packages on the feed).
With a paid account you can also have a private feed where you invite users to access it.
Click on the Create feed button to finish the setup. Once you create the feed you’ll be dumped to the main page of the package where you can select various settings to configure your package feed. By default there’s nothing there so we’ll build up our package.
Getting Your Code
First thing you want to do is add a Build Service. A build service is a mechanism to tell MyGet how to build your project. This will clone your GitHub repository on MyGet and build your package. Detailed information about the Build Services can be found here.
Click on Build Services then click on the Add build source button. This will allow you to select a build source where you’ll pull your code from.
Here you can see you can add a GitHub repository, BitBucket, CodePlex, or Visual Studio Online service (or you can add one manually).
Choose GitHub and you’ll be asked to authorize MyGet to interact with GitHub (along with maybe signing into GitHub). Once you authorize it you’ll be shown a list of repositories on GitHub you can select from. Choose the one you’re going to build the package from by clicking on the Link? checkbox and click Add (some repositories below are obscured but yours won’t be).
Once you add the build source you now have the information to setup GitHub for the webhook. Expand the build source to show the information MyGet created for it and you’ll see something like this:
Initially you won’t have any builds but this is where you’ll see those builds and their status. What’s important here is the Hook url. This is the value we’re going to use on GitHub to trigger MyGet to fetch the source when a push occurs (and build the package).
Copy the Hook url (there’s a small icon you can click on to copy it to your clipboard, typing is for weenies) and head over to your GitHub project you selected for the build source.
Webhooks
On GitHub in your repository go to Settings then click on Webhooks and Services. Click on Add webhook to show this dialog:
In the Payload URL paste the Hook URL that you got from MyGet. Leave the Content type as application/json and the radio button trigger to just work off the push event then click Add webhook.
This will add the webhook to your GitHub repository which, on a push to the repo, will trigger MyGet to do it’s stuff.
Building
Now its time to setup your package creation in GitHub and create a package. Remember, MyGet is going to be doing the fetching of the source code from GitHub and compiling and packaging. The trigger will be when you push a change to GitHub (you can also trigger the build manually from MyGet if you need to).
By default MyGet will search for a variety of things to try to figure out what to do with your codebase once it gets it. While it does look for .sln files and .csproj files (and even .nuspec files) I prefer to be specific and tell it what to do. The build service will initially look for a build.bat (or build.cmd or build.ps1) file and run it so let’s give it one to follow.
Xavier provides one in his RazorExtensions repository so I (mostly) copied that but he’s doing a few things to support his plugin. Here’s a more generic build.bat you can create that should be fine for your project:
- Line 2-5: These lines setup the configuration we’re going to use. This would be “Release” or “Debug” or whatever you have defined in your solution. If it’s blank it will use “Release”.
- Line 7-10: This sets up the PackageVersion value that will be passed onto NuGet when creating the package. Again, if it’s blank it will use 1.0.0 as the default.
- Line 12-15: Here we’re setting the nuget executable. If you have a specific one in your solution you can use it, otherwise it’ll just use the one available on MyGet (which is always the latest version)
- Line 17: This is the msbuild command to run your solution file. My solution file is in a subfolder called “src” so I specify that way, yours might be at the root so adjust accordingly. The %config% parameter is used here to select the build configuration from the solution file. The other values are for diagnostic purposes to provide information to MyGet (and you) in case the build fails.
- Line 19-21: Here I’m just setting up the output directories for NuGet. All packages will get put into a folder called “Build” and follows the standard naming for NuGet packages. Right now I just have a .NET 4.0 library but other files may come later. Build up your package folder structure accordingly (the docs on NuGet describe it here).
- Line 23: Finally we build the NuGet package specifying our .nuspec file (again mine is in a subfolder called “src”) and the version number. The “-o Build” option is use the Build directory to output the package.
Okay now we have a build.bat file that MyGet will run once it grabs the latest code from GitHub. Commit that (but don’t push yet, we’re not ready). Next up is to build the .nuspec file that will tell NuGet what’s in our package. You can create the .nuspec file manually or using NuGet to scaffold it for you (docs here). There are also some GUI tools and whatnot to build it so choose your weapon.
Here’s my .nuspec for the Terrarium SDK:
Pretty typical for a .nuspec file and pretty simple. It contains a single file, the .dll, that’s in the “lib/net40” folder. A few things to note:
- My assembly is in the project directory but the .nuspec file is in the “src” folder so the package contents are relative to where the .nuspec file is, not where the system is running it from (which is always the root with MyGet)
- We use the $version$ and $configuration$ token to replace paths and names here. These are set in the batch file prior to invoking NuGet.
Okay now we’ve got the .nuspec to define our pacakge, the source code wired up to notify MyGet, MyGet to get it on a push, and a batch file to create our package.
Push the code changes into GitHub and sit back. You can go to your Build Services page on MyGet for your feed, expand the chevron next to your feed name, and watch an automatically updated display pull your code down and create your package.
If things go wrong feel free to ping me and I can try to help, but realize that everyone’s setup is different. Check the build log for immediate errors. When MyGet fetches your repository it’ll clone it into a temporary directory and then start looking for build.bat and other files to invoke. That’s why we want to put our build.bat file in our root (mine isn’t but I’ll probably change that at some point) so we can get his party started.
A Package Is Born
Once you have a successful build you’ll see your new package under the Packages section.
Cool. You can click on the Package Id to see more detailed information about the package and also manage old releases. Unlike NuGet, MyGet let’s you delete packages rather than just unlist them.
One thing to note here is the version number. Where did that come from? In the screenshot above my version number is 1.8.0-CI0007.
MyGet follows Semantic Versioning (which is a good thing). I do recommend you give it a quick read and consider adopting it. It’s easy and lets people know when things are potentially going to break (if you follow the 3 simple rules about major, minor, and patch version). Semantic Versioning regards anything after the patch number to be whatever your want (pre-release, beta, etc.)
So about that build version. Go back to Build Services in MyGet and for your GitHub source you’ll see a button next to Build called Edit. Click it and it’ll bring up the details about the source that lets you configure how the code is fetched from GitHub.
So down a bit you’ll see a section called Version. Here you can set (or reset) a build counter. Each build on MyGet increments the counter so you know how many times the system was built (you can also use this to track what version is available or how far it’s drifted from source control or different builds in different environments, etc.). The version format field lets you enter your Semantic Versioning formatted value and use {0} as a placeholder for the counter. By default it's set to 1.0.0-CI{0} meaning that your first build is going to be labeled 1.0.0-CI000001 (the build number is prefixed with zeros).
That’s where it came from so anytime you need to bump up the major, minor, or patch version just go here to change it. As for the extra bit we’ll get to it shortly but the default version works and won’t make it’s way into our “production” versions of our package.
Consuming the Package
Now that we have a package we can add it to our package sources in Visual Studio and install it. Again this post is written from the perspective of using MyGet as your own personal repository where you can test out packages before releasing them to the public. While public packages are the default (and free) version on MyGet, you can keep pushing pre-release versions up to MyGet until you’re happy with it then “promote” it to NuGet.
In MyGet click on your package and select Feed Details from the menu. You’ll see something like this:
This is your NuGet feed from MyGet for this package. Copy it (again with the handy icon) and head into Visual Studio.
In the package manager settings add this as a package source. I just add it while I’m developing and testing the package and then disable it (so it doesn’t get confused with the “official” NuGet server). You can easily flip back and forth between packages this way.
I just name the MyGet feed after the package because it’s for testing. Activate the MyGet feed (and to avoid confusion disable the NuGet one) and then return to the managing pacakges for your solution. Select your MyGet feed from the Online choices in NuGet to see your package.
Remember that MyGet is (by default) building a pre-release version (as indicated by the –CI{0} in your version number). This means you need to select the “Include Prerelease” dropdown in the Package Manager:
You should see your package with the same version as MyGet is showing.
At this point you can install your package into a test or client app or wherever you’re using the package. Make changes to it, push the changes to GitHub and magically MyGet will fetch the changes and republish the package for you. Just go into the Updates section in NuGet to see them. Here’s a new package that was created after pushing a change up to GitHub as it appears in the Package Manager GUI in Visual Studio:
Here you can see we have 1.8.0 installed (from NuGet.org). I changed my package source to MyGet feed and there’s a new version available. It’s labeled as 1.9.0-CI00009 (Prerelease).
Like I said, you can keep pushing more versions up to GitHub and go nuts until you’re happy with the package and are ready to release.
Upstream to NuGet
The last piece in our puzzle is having MyGet push a package up to NuGet. This is a single click operation and while it can be automatic (for example pushing everything from MyGet to NuGet) you might not want that. Users would get the pitchforks out and start camping on your doorstep if you pushed out a new version of your package 10 times in a day.
Package Sources are the way to get your feed out. By default one for NuGet.org is even created for you, but it’s not configured or enabled. Click on the Package Sources and you’ll see the NuGet.org one. Click on edit (assuming you have a NuGet.org account and API key).
Enter your information to allow MyGet to talk to NuGet and in the upstream section you’ll see this:
Check the first option. This allows you to push a package from MyGet to NuGet.
Finally we’re ready to go but we don’t want version 1.9.0-CI00108 to be going public. So here’s where Semantic Versioning comes into play. Back in MyGet click on Packages on your package and then click the Push Latest button.
Here’s where the magic happen. MyGet recognizes the “–CI00009” is the prerelease tag in our version. If we leave this in, it’ll push the prerelease up to NuGet. Maybe this is okay but for my use I want to only push up tested packages when I’m ready to release them.
Clear the Prerelease tag field out. This means that will ignore that tag that’s in your version number and only push the version up using the major.minor.patch (in this case 1.9.0 will be pushed up to NuGet.org).
Click Push and in a few minutes it’ll be on NuGet with the newest version.
That’s about it. I know this was long but it was step-by-step and hopefully it should clear up some fuzziness with the process of automatically publishing your GitHub repositories as NuGet packages. As typical it actually took me longer to write this up then to actually do it.
I encourage you to check out more documentation on MyGet as this just scratches the surface as to what it can do and even in this project there are additional options you can leverage like automatically patching AssemblyInfo.cs in your build, labeling the source when you push from MyGet to NuGet, etc.
Feel free to leave your comments or questions below and enjoy!
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Getting Started with ASP.NET MVC 3, Logging, and Depency Injection
I started a new ASP.NET MVC project recently and wanted to give you a little insight on kicking off new projects. There’s some setup time you want to spend setting up your solution and getting the plumbing in order before you dive into writing unit tests and building out your site.
For a full on, blow my mind, ultimate guide you *have* to go watch Rob Conery and his 90 minute walkthrough of setting up his MVC projects. I’ve watched this video a few times and Rob is awesome and knows his stuff. The tips he gives are gold. You can also check out the MVC 3 Starter Kit on CodePlex which is based on his MVC 2 Starter code but I found it was lacking a few features. In any case, go watch his video for the full meal deal either here on YouTube or here on TekPub. This post is just a mere shadow of his work but updates the use of Ninject with MVC 3.
Okay, so we’re going to be doing some simple plumbing to get this going. We’ll put together the Hello World MVC 3 app, add in a logging system, and plumb in dependency injection in just a few minutes.
You’ll need Visual Studio 2010 with MVC 3 and NuGet installed. You can get MVC 3 from the main site here. Next install NuGet from here. The MVC 3 framework is obviously needed (Visual Studio 2010 only comes with MVC 2 out of the box) and NuGet is used to install our additional libraries (trust me, if you haven’t used NuGet before it will blow your mind).
First steps is to build a new MVC 3 app. File > New Project. Then select Visual C# > Web > ASP.NET MVC 3 Application and give it a name.
Click OK and you’ll see the options dialog for a new MVC 3 Application.
Pick Internet application as it will work for most everyone (Windows authentication works fine too but for this post it’s just easier to go with Internet). Let’s choose Razor for the view engine (ASPX is so 2011) and use HTML 5 markup (hey, it’s just a demo). We won’t create a unit test project but in a real project you’ll create one (or create a class library separately so you can use other unit testing frameworks).
We’re creating a project based on the template to give us a controller as we’ll inject our dependency into it later, otherwise we would have to create those. In a real project we might start with an empty template and create our own controllers from scratch (again, demo land, remember?).
Once you do that you’ll be at the Hello World project of the MVC world.
Okay, now we’re going to install two NuGet packages, Ninject and NLog. Ninject is an open source dependency injection framework and makes working with external dependencies (like infrastructure and services) a breeze. NLog is a free logging solution for .NET and allows you to write anything to almost any target including files, event logs, web services, mail, forms. You name it, it can write to it. I was using log4net for all my projects but lately I’ve switched over to NLog. It’s super-simple to use and highly flexible. Did I mention it’s available as a NuGet package?
Right click on the References in your project and choose Manage NuGet Packages…
Make sure you’re looking at the Online packages (sometimes the dialog will open up to installed packages or updatable ones). Type in “nlog” into the search box and you’ll see the filtered search results. Choose NLog Configuration from the options. If you already had a log configuration file you can just choose NLog to install the logger but since we’re starting from scratch we need a config file to start with. Selecting NLog Configuration and you’ll see it has a dependency on NLog so you can just install the one package which installs a starter config file and then drags along the library with it. Easy.
Once you’ve installed NLog you can enter “ninject” in the search box. This will bring up a list of packages for the dependency injection library Ninject by Nate Kohari. You’ll want to install the Ninject.MVC3 package by Remo Gloor and Ian Davis. This package will install Ninject itself and the extensions for MVC 3 (along with the bootstrapper for web projects. Ninject requires you to review and accept the license agreement before it will install so go ahead and do that.
Two packages and all of their dependencies but you’re now only a few minutes (yes, minutes) away from dependency injection heaven and MVC 3.
The first thing we’re going to do is create an interface that will be our logging system. We have a logger (NLog) but that’s an implementation and while we could scatter NLog statements all over the place, we would be tied directly to that library. If we decided to phase out NLog and replace it with another library (such as how I’ve shifted from log4net to NLog) we would have to go through everywhere in our code and replace the NLog calls with the next best thing.
This the one of the principles of dependency injection, abstraction, and SOLID. Creating an abstraction of an implementation to code against without tying ourselves to any one system (so to speak). At the end of the day we’ll still be calling into NLog functions but we’ll be doing it through an implementation class via our interface.
The other key thing about this approach is that we we can mock or stub out the actual implementation of our logger for unit testing. You can really do that (very well) with concrete implementations. Imagine having to start up a database, file system logger, and the Windows Event log service just to unit test some business code.
In addition to being able to test our code, we can also code to interfaces meaning that we don’t need the actual implementation until it comes time to actually perform the work. For example the project I’m currently working on is going to require to call out to web services and databases. These components are not built yet and won’t be for another month or so. I don’t want to halt the development of my app so I create service interfaces and repositories that will abstract these away from my system, allowing me to build a fully working (and tested) system (which just happens to use hard coded values for now). Later when those services appear I just build an implementation to talk to them and voila, my system is still working exactly the way it does today.
Okay, enough talk. Here’s the interface for our logging system. I’m borrowing from Rob’s approach by creating a folder called Infrastructure with a subfolder called Logging. In it I’ll create an ILogger interface that will let me write an information message (most logging systems have various levels of logging like Information, Warning, Errors, etc.)
And here’s my ILogger interface:
1: namespace MvcStarter.Infrastructure.Logging
<pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum2"> 2:</span> {</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum3"> 3:</span> <span style="color: #0000ff">public interface</span> ILogger</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum4"> 4:</span> {</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum5"> 5:</span> <span style="color: #0000ff">void</span> Info(<span style="color: #0000ff">string</span> message);</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum6"> 6:</span> }</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum7"> 7:</span> }</pre>Next we need an implementation. We’ll create one for NLog. This is a simple class that implements ILogger and provides the Info method (along with the setup needed for NLog to work). Here’s the NLogLogger class:
1: using NLog;
<pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum2"> 2:</span> </pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum3"> 3:</span> <span style="color: #0000ff">namespace</span> MvcStarter.Infrastructure.Logging</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum4"> 4:</span> {</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum5"> 5:</span> <span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span> NLogLogger : ILogger</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum6"> 6:</span> {</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum7"> 7:</span> <span style="color: #0000ff">private</span> Logger _logger;</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum8"> 8:</span> </pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum9"> 9:</span> <span style="color: #0000ff">public</span> NLogLogger()</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum10"> 10:</span> {</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum11"> 11:</span> _logger = LogManager.GetCurrentClassLogger();</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum12"> 12:</span> }</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum13"> 13:</span> </pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum14"> 14:</span> <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span> Info(<span style="color: #0000ff">string</span> message)</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum15"> 15:</span> {</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum16"> 16:</span> _logger.Info(message);</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum17"> 17:</span> }</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum18"> 18:</span> }</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum19"> 19:</span> }</pre>We create a private variable of type NLog.Logger and create it in our constructor using the LogManager from NLog. Then to write using NLog we just call the Info method on the class, passing it our message.
There are a lot of other methods we can call and add to our interface so later maybe we’ll extend that but this is enough to get you started.
One more thing is that the default config file that was installed with the package is just that, blank. You need to tell it at least what target to use and what rules to apply to each target. The entire config file is documented online but you can just uncomment the sample implementation. Make sure to match up the logger rule (Trace in the config file) with your method you’re calling in the implementation. I just changed the minLevel of the NLog config file from Trace to Info to match our code.
That’s all you need to have logging working but how do we call it? And how does Ninject fit in?
Back when we installed Ninject it created a file for us. Go back to your project and check out the App_Start folder. Expand it and you’ll see a new file there called NinjectWebCommon.cs
This sucker is responsible for kickstarting Ninject for you. If you watched Rob’s video or saw some tutorials on the net they talk about changing the base HttpApplication to a Ninject one. That’s one approach but with MVC 3 and the NuGet package this way is much simpler. There’s nothing for you to do except tell Ninject what dependencies you want to deal with and how to resolve them.
Open up NinjectWebCommon.cs and scroll down to the RegisterServices method. This is where you’ll specify you own interfaces and concrete classes so Ninject can do it’s magic.
With a single line we’re going to tell Ninject this:
1: /// <summary>
<pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum2"> 2:</span> <span style="color: #008000">/// Load your modules or register your services here!</span></pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum3"> 3:</span> <span style="color: #008000">/// </summary></span></pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum4"> 4:</span> <span style="color: #008000">/// <param name="kernel">The kernel.</param></span></pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum5"> 5:</span> <span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> <span style="color: #0000ff">void</span> RegisterServices(IKernel kernel)</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum6"> 6:</span> {</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum7"> 7:</span> kernel.Bind<ILogger>().To<NLogLogger>().InSingletonScope();</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum8"> 8:</span> } </pre>What are we saying here? Simple. We’re telling Ninject to:
- Whenever you see the ILogger interface needed (e.g. passed into a constructor of a class)
- Resolve to the NLogLogger class
- Make it a singleton (i.e. only do it once and reuse it over and over again)
We’re making our logger a singleton because we don’t need to start NLog every time we want to log a message. You can also specify other scopes (like by thread or on demand) but for logging a singleton works.
Oh yeah, that’s it to hook up your dependency injection engine. And logging is ready to go.
Let’s give it a whirl. Crack open the HomeController class and add a constructor that takes in an ILogger interface then using that interface, write out a message when the Index method is called (i.e. our home page is visited). Here’s the modified HomeController class:
1: using System.Web.Mvc;
<pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum2"> 2:</span> <span style="color: #0000ff">using</span> MvcStarter.Infrastructure.Logging;</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum3"> 3:</span>  </pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum4"> 4:</span> <span style="color: #0000ff">namespace</span> MvcStarter.Controllers</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum5"> 5:</span> {</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum6"> 6:</span> <span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span> HomeController : Controller</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum7"> 7:</span> {</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum8"> 8:</span> <span style="color: #0000ff">private</span> <span style="color: #0000ff">readonly</span> ILogger _logger;</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum9"> 9:</span>  </pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum10"> 10:</span> <span style="color: #0000ff">public</span> HomeController(ILogger logger)</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum11"> 11:</span> {</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum12"> 12:</span> _logger = logger;</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum13"> 13:</span> }</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum14"> 14:</span>  </pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum15"> 15:</span> <span style="color: #0000ff">public</span> ActionResult Index()</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum16"> 16:</span> {</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum17"> 17:</span> ViewBag.Message = <span style="color: #006080">"Welcome to ASP.NET MVC!"</span>;</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum18"> 18:</span> _logger.Info(<span style="color: #006080">"Home page visited"</span>);</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum19"> 19:</span> <span style="color: #0000ff">return</span> View();</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum20"> 20:</span> }</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum21"> 21:</span>  </pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum22"> 22:</span> <span style="color: #0000ff">public</span> ActionResult About()</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum23"> 23:</span> {</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum24"> 24:</span> <span style="color: #0000ff">return</span> View();</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum25"> 25:</span> }</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum26"> 26:</span> }</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum27"> 27:</span> }</pre>We add an ILogger interface to the constructor. This trigger Ninject to figure out what implementation to grab (our NLogLogger one) and create it for us (or reuse it since we told it we wanted a singleton). Then we use that implementation in our Index() method to log a message.
Compile and run the app to visit the home page of your app and you’ll see this in your log:
1: 2012-05-15 19:18:38.8471 INFO Home page visitedThat’s it. You have a logging system you can call anytime (just inject the interface into the class, Ninject will take care of the rest) and your project is setup with dependency injection and you’re ready to go. Now you can just add additional interfaces as you need them.
The awesome thing here is that a) you can now mock or stub out your logging implementation and test it and b) replace that implementation with some other logger any time and your code will still just work.
That’s the power of dependency injection.
As a bonus piece of information, now that you have the dependency injection setup you can use it any time in case you’re in a pinch and don’t need/want to inject the implementation into your class.
Here’s how you can call the logger from your Application_Start method (found in Global.asax.cs) before any controllers are fired up:
1: protected void Application_Start()
<pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum2"> 2:</span> {</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum3"> 3:</span> AreaRegistration.RegisterAllAreas();</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum4"> 4:</span>  </pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum5"> 5:</span> RegisterGlobalFilters(GlobalFilters.Filters);</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum6"> 6:</span> RegisterRoutes(RouteTable.Routes);</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum7"> 7:</span>  </pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum8"> 8:</span> DependencyResolver.Current.GetService<ILogger>().Info(<span style="color: #006080">"Application Started"</span>);</pre><pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum9"> 9:</span> }</pre>See that last line? DependencyResolver.Current.GetService will use whatever IoC you have configured and return the implementation of that interface.
Okay, that’s enough to get started. Again, I encourage you to watch Rob’s *entire* video of setting up a new MVC project. Even though the video is for MVC 2, there are still a lot of idea that hold water in MVC 3 and it’s a great learning too (and free too).
Enjoy!
