But when updating the new values showing null. what should I do?
<asp:FormView ID="SingleUser" runat="server" DataKeyNames="UserId"
DataSourceID="ObjectDataSource1" Width="750px">
<EditItemTemplate>
<telerik:RadPanelBar runat="server" ID="RulePanelBar" ExpandMode="MultipleExpandedItems"
Width="740px" Skin="Metro">
<Items>
<telerik:RadPanelItem Expanded="True" Text="Step 1: Basic Information" runat="server"
Selected="true">
<ItemTemplate>
<table cellpadding="0" cellspacing="0" border="0" width="100%">
<tr>
<td>
<asp:Label ID="FirstNameLabel" runat="server" AssociatedControlID="txtFirstName" >First Name:</asp:Label>
<asp:TextBox ID="txtUserID" runat="server" Text='<%#DataBinder.Eval(SingleUser.DataItem,"UserId")%>'
Width="2px" Visible="False"></asp:TextBox>
<asp:TextBox CssClass="textEntry" ID="txtFirstName" title="Enter First Name Here"
runat="server" Text='<%#DataBinder.Eval(SingleUser.DataItem,"FirstName")%>'></asp:TextBox>
</td>
<td>
<asp:Label ID="MiddleNameLabel" runat="server" AssociatedControlID="txtMiddleName" >Middle Name:</asp:Label><br />
<asp:TextBox CssClass="textEntry" ID="txtMiddleName" title="Enter Middle Name Here"
runat="server" Text='<%# DataBinder.Eval(SingleUser.DataItem,"MiddleName") %>'></asp:TextBox>
</td>
<td>
<asp:Label ID="LastNameLabel" runat="server" AssociatedControlID="txtLastName" >Last Name:</asp:Label>
<asp:TextBox CssClass="textEntry" ID="txtLastName" title="Enter Last Name Here" runat="server"
Text='<%# DataBinder.Eval(SingleUser.DataItem,"LastName") %>'></asp:TextBox>
</td>
<td>
</td>
</tr>
</table>
</ItemTemplate>
</telerik:RadPanelItem>
</Items>
<CollapseAnimation Duration="100" Type="None" />
<ExpandAnimation Duration="100" Type="None" />
<ExpandAnimation Duration="100" Type="None" />
<CollapseAnimation Duration="100" Type="None" />
</telerik:RadPanelBar>
-kalpana