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    EntityDataSource

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    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:RadTreeView runat="server" ID="RadTreeView1" 
    DataSourceID="EntityDataSource1" DataTextField="Text" 
    DataFieldID="id" DataFieldParentID="parentId" >
</telerik:RadTreeView>
<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.

    • DefaultCS.aspx
    <%@ Page Language="C#"  Inherits="Telerik.QuickStart.QsfPage" %>
     
    <%@ Register Assembly="System.Web.Entity, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
        Namespace="System.Web.UI.WebControls" TagPrefix="asp" %>
    <%@ 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:RadTreeView RenderMode="Lightweight" runat="server" ID="RadTreeView1" DataSourceID="EntityDataSource1" 
                DataTextField="Text" DataFieldID="id" DataFieldParentID="parentId">
                <DataBindings>
                    <telerik:RadTreeNodeBinding Depth="0" Expanded="true"></telerik:RadTreeNodeBinding>
                </DataBindings>
            </telerik:RadTreeView>
        </div>
        <asp:EntityDataSource runat="server" ID="EntityDataSource1" ConnectionString="name=TelerikReadWriteEntities"
            DefaultContainerName="TelerikReadWriteEntities" EntitySetName="Links">
        </asp:EntityDataSource>
        </form>
    </body>
    </html>

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