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Migration from RadWindow for ASP.NET (Classic) to RadWindow for ASP.NET AJAX

You can find below the list of steps to migrate your web applications from the classic RadWindow to RadWindow"Prometheus":

  1. To add RadWindow "Prometheus" to an existing ASP.NET web application you need to follow these steps:

    1. Make sure you have installed ASP.NET AJAX. Info can be found at

    2. If your web application is not using ASP.NET AJAX you need to configure it to do so. Detailed instructions can be found at (check the topic called Adding ASP.NET AJAX Configuration Elements to an Existing Web Site)

    3. Add a ScriptManager control to the page (or user control) in which you are going to add any controls from the Telerik® UI for ASP.NET AJAX suite. If your page is a content page you can add the ScriptManager control in your master page. For further details about the ScriptManager control you can check

  2. Drag and drop a control from the Telerik® UI for ASP.NET AJAX package or manually copy the Telerik.Web.UI.dll in the Bin folder.

  3. Replace the classic RadWindow's directive <%@ Register Assembly="RadWindow.NET2" Namespace="Telerik.WebControls" TagPrefix="radW" %> with the new one of RadWindow for ASP.NET AJAX: <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

  4. Replace the classic RadWindow's declaration: <radW:RadWindow id="RadWindow1" Runat="server">Sample Content</radW:RadWindow> with the new RadWindow for ASP.NET AJAX one: <telerik:RadWindow RenderMode="Lightweight" ID="RadWindow1" runat="server"></telerik:RadWindow>

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