• .NET

    Auto-complete ComboBox with WCF Service and RadControls for Silverlight

    Sometimes we need to load very large amount of items in a ComboBox and let the user select one of them. Usually in those cases the ComboBox allows typing in order to auto-select the items, that contain the text in the control. Such scenarios are possible with RadComboBox for Silverlight and now I will show you a simple application, that demonstrates what I think is a better practice for the implementation. We want to put all words from the English dictionary of RadSpell for ASP.NET in a RadComboBox for Silverlight and allow the user to select one of them, that will...
    December 04, 2008
  • .NET

    TreeView in a ComboBox dropdown using RadControls for Silverlight

    As far as I can tell from the experience of my colleagues with RadControls for ASP.NET AJAX, one of the common feature requests for RadComboBox and RadTreeView is combining them into one piece. Recently we started to receive similar requests for RadComboBox and RadTreeView for Silverlight. Placing a TreeView in a ComboBox sometimes makes a lot of sense, so I decided to research the best way to do it.   The first, the simplest and most obvious way is to place a RadTreeView as content of RadComboBox: <input:RadComboBox> <nav:RadTreeView  ItemTemplate="{StaticResource ItemTemplate}"  ItemsSource="{StaticResource ItemsSource}" /></input:RadComboBox> This works, but it has one important limitation: RadComboBox cannot...
    November 08, 2008
  • .NET

    RadControls for Silverlight Demo with ADO.NET Data Services

    Yesterday I wrote about how to databind RadTreeView for Silverlight to ADO.NET Data Service and use Load on Demand. The simple application from yesterday was upgraded to a small back-end application for the Northwind database, that allows editing and deleting products. This time I decided to give it to one of our designers and our new Silverlight front end developer and they implemented this slick design: The application is available online: http://demos.telerik.com/silverlight/northwindbackend/Default.aspx The source code can be downloaded from here: NorthwindBackend.zip In addition to yesterday's application, NorthwindBackend has extended data source, that provides simple undo mechanism and ability to update and delete products...
    October 09, 2008
  • .NET

    Silverlight TreeView Load on Demand

    Today I created a really simple application that demonstrates "best practice" for using RadTreeView with load on demand and ADO.NET Data Service. The application uses the Northwind database, that can be downloaded here. The tricky part is that in order to create almost codeless application we need to modify the automatically generated code of the service reference. To do that you will need to show all files in the Silverlight application (click the Show All Files in the Solution Explorer title bar) and then open Reference.cs: In this file replace all occurrences of "System.Collections.ObjectModel.Collection" with "System.Collections.ObjectModel.ObservableCollection". This probably will be changed in...
    October 08, 2008
  • .NET Desktop JavaScript

    Adding Mouse Wheel support in Silverlight. The easy way.

    One of the best uses of our Routed Event extension is implementing missing system events in Silverlight, such as MouseWheel and RightButtonUp/Down. The API we provide is the same as WPF, so when Silverlight eventually gets support for those events, most probably you will not have to change much. Other good thing is that you do not need to write any JavaScript, or to know what's going on beneath. The bad thing is that you will have to enable the windowless mode of the Silverlight plug-in, which will slightly decrease the performance of your application. To attach a Routed Event handler for the MouseWheel event on a...