• .NET

    TreeView BringIntoView

    Quite often TreeView is used in scenarios where a particular item should be displayed on the screen. You may want to display some item when the tree is initially shown on the screen or when a new item is added. These scenarios look simple but are a bit tricky because you have to wait until the TreeView loads and then make your desired actions. Waiting for Loaded Event TreeView provides the BringIntoView functionality in several forms: you can call BringIntoView from the tree itself and bring a child item; get some TreeViewItem by calling GetItemByPath and call BringIntoView upon this item container;...
  • .NET

    How to Create Ad Rotator with Telerik TransitionControl and CoverFlow control for Silverlight

    function onSilverlightError(sender, args) { var appSource = ""; if (sender != null && sender != 0) { appSource = sender.getHost().Source; } var errorType = args.ErrorType; var iErrorCode = args.ErrorCode; if (errorType == "ImageError" || errorType == "MediaError") { return; } var errMsg = "Unhandled Error in Silverlight Application " + appSource + "\n" ; errMsg += "Code: "+ iErrorCode + " \n"; errMsg += "Category: " + errorType + " \n"; errMsg += "Message: " + args.ErrorMessage + " \n"; if (errorType == "ParserError") { errMsg += "File: " + args.xamlFile + " \n"; errMsg += "Line: " + args.lineNumber + " \n"; errMsg += "Position: " + args.charPosition + " \n"; } else if (errorType == "RuntimeError") { if (args.lineNumber != 0) { errMsg += "Line: " + args.lineNumber + " \n"; errMsg += "Position: " + args.charPosition + " \n"; } errMsg += "MethodName: " + args.methodName + " \n"; } throw new Error(errMsg); } Today I'm going to show you a very simple way to turn any ContentControl or a ListBox control into an AdRotator control. "What is AdRotator control?", you would ask. A common definition for an AdRotator is a control that lets you to show some data (most commonly ads) and change it periodically. An AdRotator control should be a control that lets you do that out-of-the-box without writing any code. Furthermore, switching the ads with a nice animation will give our AdRotator more polished and glamorous look. To accomplish this, we are going to use RadTransitionControl (a ContentControl) and RadCoverFlow (a ListBox)...
  • .NET

    Why we have built RadDomainDataSource for Silverlight?

    Although Rossen has stated almost all of the things in his introductory blog post about RadDomainDataSource I wanted to create a separate blog entry which answers the most important question that you might be asking: “Why Telerik have developed their own version of a domain data source component?” Here is the answer: We felt your pain We have received numerous forum posts and support tickets stating that you want a codeless approach to data-binding that supports most common data operations without the need for any custom code. During the times when RadDomainDataSource was not available you will have to write hundreds of lines of code in...
    January 03, 2011
  • .NET

    Using commands with RadDragAndDropManager for WPF and Silverlight

        In this post I will demonstrate how to extend the Drag Drop functionality of the RadDragAndDropManager adding command support by using the attached behaviors extensibility. That way one can easily move the logic for the operation from the code behind into your model and work only with the Data object. To demonstrate the idea I will use scenario where items are being dragged between ListBoxes.   The behavior transforms the Drag Drop events into commands. It exposes the following properties: - DragCommand – executed when dragInfo event is raised. - DropCommand – executed when dropInfo event is raised. - DragCueTemplate – data template that defines the dragcue...
    December 15, 2010
  • .NET Mobile

    Introducing the RadNumericUpDown Control for Windows Phone 7

    While developing the RadControls for Windows Phone 7 QSF we heavily discussed how the screen real estate should be organized so that we can display as much content as possible without losing on the UX front. We have many examples where user input is required which automatically implies increased amount of controls on the example page and thus leading to difficulties when optimally using the screen space. For instance, our Animation examples allow for adjusting animation parameters to better demonstrate functionality. At the beginning we implemented the input via TextBox elements: we allowed the user to type in the desired value, after that...
    December 13, 2010