Contents tagged with ASP.NET

  • Call Controller Actions using HttpClient

    The HttpClient component is typically used to call a Web API. The overall design of HttpClient component is geared towards REST services. However, you can also use the HttpClient to call MVC actions. Of course, the actions to be called must follow the pattern as expected by the HttpClient.

  • Infinite scrolling using jQuery Ajax and ASP.NET MVC

    Web applications such as Facebook and Twitter use a technique known as infinite scrolling or endless scrolling wherein data is loaded on the fly when a user scrolls to the bottom of a web page. There are many jQuery plugins that help you enable such a feature in your web application. However, if you wish to avoid any third-party dependency or have some specific needs, you can add your own infinite scrolling with a few lines of jQuery code and ASP.NET MVC. This article tells you how that can be accomplished.

  • Compress the Response Content in ASP.NET MVC

    Developers often minify JavaScript and CSS files in an attempt to improve the performance of their ASP.NET MVC application. In addition to minifying JavaScript and CSS files you can also pay attention to reducing the size of the HTML response. You may minify the HTML output from a view or you may compress the output (you can also use both together). To that end this article shows how to compress HTML response by writing a custom action filter.

  • Two Ways of Handling Concurrency Violations in Entity Framework Code First

    When you update an entity and call SaveChanges() to save the values back in the database, the existing values for that record are overwritten by the new entity values. This is the default behavior in entity framework code first. In a real world situation it is quite possible that database values might have got changed after you select them for modification. In such cases, your update operation might be overwriting changes made by someone else. This is concurrency violation. And it is important to detect if concurrency violation has occurred. You can then take some corrective action or at least inform the user about such a violation.

  • Create Strongly Typed Custom HTML Helper for Picking Dates

    Recently some beginner asked me as to how a strongly typed HTML helper can be created. Although the process is relatively simple you need to keep in mind a certain steps. In this short article I will explain how a custom HTML helper can be created to render an HTML5 date picker input field. I will explain unbound as well as model bound versions for better clarity.

  • Use $broadcast(), $emit() and $on() in AngularJS

    AngularJS applications may need to communicate across the controllers. Such a communication might be needed to send notifications or to pass data between the controllers. Although there can be different approaches to achieve this goal, one that is readily available is the event system of $scope and $rootScope. Both of these objects - $scope and $rootScope - support three methods namely $broadcast(), $emit() and $on() that facilitate event driven publisher-subscriber model for sending notifications and passing data between the controllers. In this article I will discuss how to raise events using $broadcast() and $emit() and then how to handle those events using $on().

  • Use ASP.NET MVC Controller as API

    A few months ago I wrote an article titled ASP.NET MVC Controller Vs. Web API - 5 Things You Should Know, wherein I discussed the main differences between an ASP.NET MVC controller and Web API. Some readers asked how exactly one can use an MVC controller as an API. So, in this article I am going to discuss the same with an example.

  • Prepare Yourself for ASP.NET 5 - Part 5 (Framework Versions)

    Today when you decide to develop a web application you don't need to make any decision about the underlying .NET framework. This is because there is just one .NET framework available today. Going forward, you need to give some thought about the kind of .NET framework you wish to target. Two flavors of .NET framework will be available - Full and Core. For the sake of this article, I am going to call the former as .NET Full and the later as .NET Core.