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Version Q1 2012 released 04/11/2012
select

TreeView / 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=TelerikEntities"
	DefaultContainerName="TelerikEntities" 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.

Source Code

C# VB.NET
Show code in new window Demo isolation steps
  • <%@ Page Language="C#" %>

    <%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
    <%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
    <%@ Register TagPrefix="qsf" TagName="Header" Src="~/Common/Header.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="HeadTag" Src="~/Common/HeadTag.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="Footer" Src="~/Common/Footer.ascx" %>
    <%@ Register Assembly="System.Web.Entity, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
        Namespace="System.Web.UI.WebControls" TagPrefix="asp" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <qsf:HeadTag ID="Headtag1" runat="server"></qsf:HeadTag>
    </head>
    <body class="BODY">
        <form id="form1" runat="server">
        <div>
            <telerik:RadScriptManager ID="RadScriptManager1" runat="server">
            </telerik:RadScriptManager>
            <qsf:Header ID="Header1" runat="server" NavigationLanguage="C#"></qsf:Header>
            <telerik:RadTreeView runat="server" ID="RadTreeView1" DataSourceID="EntityDataSource1"
                DataTextField="Text" DataFieldID="id" DataFieldParentID="parentId" >
                <DataBindings>
                    <telerik:RadTreeNodeBinding Depth="0" Expanded="true" />
                </DataBindings>
            </telerik:RadTreeView>
    <asp:EntityDataSource runat="server" ID="EntityDataSource1" ConnectionString="name=TelerikEntities"
    DefaultContainerName="TelerikEntities" EntitySetName="Links">
            </asp:EntityDataSource>
            <qsf:Footer ID="Footer1" runat="server"></qsf:Footer>
        </div>
        </form>
    </body>
    </html>

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