The Update method can only be called on UpdatePanel with ID 'UpdatePanel1' before Render.|

[Jeff]

hey

asp.net 3.5

I have 2 UpdatePanels in my webpage. This webpage has a GridView, which one
of its column is a templatefield which again contain a UpdatePanel and a
button...

The other UpdatePanel is located outside the GridView....

when I click on the button in the GridView I get this error message:
The Update method can only be called on UpdatePanel with ID 'UpdatePanel1'
before Render.

here is the markup of the UpdatePanel which is located outside GridView:
<asp:UpdatePane l ID="UpdatePanel 1" runat="server" UpdateMode="Con ditional">
<ContentTemplat e>
<asp:Label ID="Label2" Text="ee" runat="server"> </asp:Label>
</ContentTemplate >
</asp:UpdatePanel >

Here is the markup of the UpdatePanel inside the GridView:
<asp:TemplateFi eld>
<ItemTemplate >
<asp:UpdatePane l runat="server" UpdateMode="Con ditional"
ChildrenAsTrigg ers="false">
<ContentTemplat e>
<asp:ImageButto n ID="ibSelect" ImageUrl="~/Images/ArrowR.gif"
OnCommand="ibSe lect_Command" runat="server" />
</ContentTemplate >
</asp:UpdatePanel >
</ItemTemplate>
</asp:TemplateFie ld>

Here is the code-behind methods being called by the markup above:
protected void ibSelect_Comman d(object sender, CommandEventArg s e)
{
string url = "<url>";
WebRequest request = WebRequest.Crea te( url +
e.CommandArgume nt.ToString() );
request.BeginGe tResponse(new AsyncCallback(O nResponse), request);
}


protected void OnResponse(IAsy ncResult ar)
{
WebRequest request = (WebRequest)ar. AsyncState;
WebResponse response = request.EndGetR esponse(ar);
System.IO.Strea m stream = response.GetRes ponseStream();
System.IO.Strea mReader reader = new System.IO.Strea mReader(stream) ;
string line;
System.Text.Str ingBuilder html = new System.Text.Str ingBuilder(40);
while ((line = reader.ReadLine ()) != null)
{
html.Append(lin e);
}
Label2.Text = html.ToString() ;
UpdatePanel1.Up date(); <<---------- here the program stops
executing and I get the error
}

any suggestions?