Contents tagged with ASp net
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What are the hidden features of Asp.Net?
There are always features that would be useful in fringe scenarios, but for that very reason most people don't know them.
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Setting Server Control Properties Based on Target Browser
You can set a different value for a property for IE than for Firefox - and for anything else. I didn't try all properties, but I did try many that would matter, such as Text and OnClientClick etc, and they do work. Take a look at the following markup:
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Taking an ASP.NET Site Offline with a Message
This was another one that I was literally beside myself that I didn't know this one before. A fellow business partner of mine named James Sutton mentioned this one to me. This one's been around since ASP.NET 2.0 as well. If you have an ASP.NET web application site, and you place a text file named "app_offline.htm" in the root of the site, all requests to that website will redirect to that app_offline.htm file. Basically, if you need to take an entire ASP.NET site offline, you can place some nice message in that file. Then, any new requests to a URL, any URL, in that website will redirect to that file allowing you to do maintenance to the site, upgrades, or whatever. It is not really a redirect though. ASP.NET essentially shuts down the site, unloads it from the server, and stops processing any requests to that site. That is, until you delete the app_offline.htm file - then things will continue as normal and your ASP.NET site will load up and start serving requests again.
A super-cool side effect of this is that any files that are locked by the site, such as a database or other resources, are freed since the application domain has been unloaded from the server. This allows you to remove the locks from those files and replace them, without the need to do a full IISRESET, taking down other sites on the server. One thing to keep in mind with this file however, make sure you out enough content in it so it is larger than 512 bytes or IE will consider it a 404 and will display the 404 instead of the contents of your app_offline.htm file.
Thanks to Ryan Farley for posting this tip... -
New Image Generator control in ASP.Net 3.5
Storing images in database BLOB field and displaying it on aspx page is one of the common tasks we do in asp.net projects. Asp.Net itself does not have an in build control to bind the image stored in database. To display an image stored in database, we will write an HttpHandler which will fetch the image from database and do a binary write. We all know that doing a binary write will become cumbersome when the number of images increases and the number of users becomes high. This week Microsoft have released a new control called ASP.NET Generated Image control to display image in ASP.Net page. This article will give you a kick start on this control and some of its features.
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Webcast - The Net Coffee Break Show
organized by
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Add Custom Configuration Sections into a Separate web.config
Adding custom configuration sections lets you leverage built-in .NET configuration mechanism to employ strong-type objects to access the configuration content without taking care of manipulation of XML1, 2. This article introduces a tip about how to add your custom configuration sections in “another” web.config while not losing the support as in the web.config located at the root of Web applications.
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Improve Web Application Performance
Adnan Aman shows some tricks and tips to improve the performance of web applications.
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Role Based Forms Authentication
Using Role based forms authentication, we can restrict users of the site to accessing certain resource if they are not part of a particular role. In this article, Satheesh demonstrates how to build sites with this type of authentication. He provides a short overview of various Login Controls and Providers and then discusses a scenario with detailed explanation of various aspects of the sample application with screenshots and source code.
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Implementing a Session Timeout Page
In this article, Steve walks through the steps required to implement a Session Logged Out page that users are automatically sent to in their browser when their ASP.NET session expires. He examines each step with the help of detailed explanation supported by relevant source code.
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Adding Filter Action to FileUpload Control