New to Telerik UI for ASP.NET AJAX? Download free 30-day trial

Entity DataSource

  • cat-1

This example shows how to codelessly bind RadTreeView to EntityDataSource. Since the EntityDataSource is not hierarchical by nature you need to set the DataFieldID and DataFieldParentID properties: 

<telerik:RadDropDownTree runat="server" ID="RadDropDownTree1" 
    DataSourceID="EntityDataSource1" DataTextField="Text" 
    DataFieldID="id" DataFieldParentID="parentId" >
</telerik:RadDropDownTree>
<asp:EntityDataSource runat="server" ID="EntityDataSource1" 
	ConnectionString="name=TelerikReadWriteEntities"
	DefaultContainerName="TelerikReadWriteEntities" EntitySetName="Links">
</asp:EntityDataSource>

You may also see how to utilize Telerik OpenAccess ORM as a data access layer for our AJAX controls by visiting the OpenAccess ORM live demos here.

  • DefaultVB.aspx
<%@ Page Inherits="Telerik.QuickStart.QsfPage"  %>
<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<!DOCTYPE html>
<html xmlns='http://www.w3.org/1999/xhtml'>
<head runat="server">
    <title>Telerik ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />
    <div class="demo-container size-thin">
        <telerik:RadDropDownTree RenderMode="Lightweight" ID="RadDropDownTree1" runat="server" DataSourceID="EntityDataSource1" DefaultMessage="Please select" Width="100%"
            DataTextField="Text" DataFieldID="id" DataFieldParentID="parentId">
            <DropDownSettings Width="300px" />
        </telerik:RadDropDownTree>
        <asp:EntityDataSource runat="server" ID="EntityDataSource1" ConnectionString="name=TelerikReadWriteEntities"
            DefaultContainerName="TelerikReadWriteEntities" EntitySetName="Links">
        </asp:EntityDataSource>
    </div>
    </form>
</body>
</html>

Support & Learning Resources

Find Assistance