or
//... <script type="text/javascript"> function pageLoad() { var dataPane = $find('<%= this.SplitterPlaceholder.FindControl("LeftContentPane").ClientID %>'); dataPane.setVarSize($(window).width()); } </script> //... <telerik:RadSplitter ID="RadSplitter1" Height="100%" runat="server" ClientIDMode="AutoID"> <telerik:RadPane ID="ContentPane" runat="server"> <telerik:RadSplitter ID="Radsplitter2" runat="server" Orientation="Vertical"> <telerik:RadPane ID="RadPane1" runat="server" ContentUrl="Data.aspx" /> <asp:ContentPlaceholder ID="SplitterPlaceholder" runat="server" /> <telerik:RadSplitBar ID="ContentSplitBar" runat="server" /> <telerik:RadPane ID="RightContentPane" ContentUrl="Map.aspx" runat="server"> </telerik:RadPane> </telerik:RadSplitter> </telerik:RadPane> <telerik:RadSplitBar ID="RadSplitBar2" runat="server" /> <telerik:RadPane ID="BottomPane" runat="server"> </telerik:RadPane> </telerik:RadSplitter> //..<%@ Page Language="C#" MasterPageFile="~/Default.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="UIProject.Default" %> <asp:Content id="Pane" ContentPlaceholderID="SplitterPlaceholder" runat="server"> <telerik:RadPane ID="LeftContentPane" runat="server" ContentUrl="Data.aspx" /> </asp:Content><telerik:GridTemplateColumn HeaderText="Product ID" HeaderStyle-Font-Bold="true" AllowFiltering="true" DataField="ProductID"> <EditItemTemplate> <telerik:RadComboBox ID="RadCbProductIDEdit" Skin="Office2007" runat="server" MarkFirstMatch="true" AllowCustomText="true" DataValueField="ProductID" EmptyMessage="Please select a ProductID " DataTextField="ProductID" DataSourceID="LinqDataSource1" Height="100px"> </telerik:RadComboBox> </EditItemTemplate> <InsertItemTemplate> <telerik:RadComboBox ID="RadcbProductIDInsert" runat="server" Skin="Office2007" MarkFirstMatch="true" AllowCustomText="true" DataValueField="ProductID" EmptyMessage="Please select a ProductID " DataTextField="ProductID" DataSourceID="LinqDataSource1" Height="100px"> </telerik:RadComboBox> </InsertItemTemplate> <ItemTemplate> <asp:Label ID="lblProductID" runat="server" Text='<%# Bind("ProductID") %>'></asp:Label> </ItemTemplate> <HeaderStyle Font-Bold="True" /> </telerik:GridTemplateColumn><asp:LinqDataSource ID="LinqDataSource1" runat="server" ContextTypeName="LPSFPrototypeScreens.tblProduct" EntityTypeName="" Select="new (ProductID)" TableName="tblProductFeatures" >