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One of the new controls available with ASP.NET 4 is the QueryExtender control. The QueryExtender is designed to simplify filtering data returned from a LinqDataSource or EntityDataSource by decoupling the filtering logic from the data source control. Using the QueryExtender is easy - simply add a QueryExtender to the page, specify what data source control it applies to, and then define the filtering criteria. For example, when displaying product information on a web page you could use the QueryExtender control and a few lines of markup to display only those products that are not within a certain price range and whose name or category starts with a user-specified search string.

Filtering the data returned by a LinqDataSource or EntityDataSource control is certainly possible without the QueryExtender; both the LinqDataSource and EntityDataSource controls have a Where property that can be used to specify filtering criteria. What the QueryExtender offers is a simpler means by which to filter data. This article includes a number of demos (which can be downloaded at the end of this article) that showcase the QueryExtender's ease of use and its powerful filtering capabilities.

This articles provides a guideline on how to create a ASP.NET weather control that will show weather using Google Weather API. This control also contains some property that will let user select the location it will show weather.

Long time ago, I wondered how Microsoft Access put an Edit control on the context menu! Then I got another idea ... why don't we use any control(s) on the context menu? This will make the user interface easier to use, learn and increase productivity. The good news here is that, you can make it the same way you design a user control or a form using the Visual Studio designer..

Simple implementation of a differential gap control to track the sun East/West movement.

This article describes how to create a user control with event & properties.

Programming for extensibility assures ease of maintainability in your design. Control templates offer this functionality to custom Web controls.

Create a custom asp.net 3.5 control with WebResources, client side JS and httphandlers

ASP.NET's new ListView control provides template-based layout for both display and CRUD database operations, making it an extremely way to build data-centric Web applications.

A control to edit maps or small pictures in tile form.

Highrise and other new AJAX enabled tools have this feature that when you type in a search query, it automatically updates the search results below. It's almost like an auto-complete box, but with the full results on the page instead of a dropdown list below the control. Unfortunately, I didn't find anything like this in the Microsoft ASP.NET AJAX Toolkit. So, I decided that this was a good way to finally dive into the AJAX Control Toolkit..