I have the following GridView inside an UpdatePanel:
<asp:GridView ShowHeaderWhenEmpty="false" AlternatingRowStyle-BackColor="#EBE9E9" AutoGenerateColumns="false" OnSorting="yourTasksGV_Sorting" AllowSorting="true" ID="yourTasksGV" runat="server" ClientIDMode="Static" EmptyDataText="You currently have no tasks assigned to you" OnRowDataBound="yourTasksGV_RowDataBound" OnRowCreated="yourTasksGV_RowCreated">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:ImageButton ID="imgExpCol" ImageUrl="~/theImages/subTaskPlus.png" runat="server" ClientIDMode="Static" CssClass="imgExpCol" AlternateText="plus" CommandArgument='<%#Eval("Object") %>' OnCommand="imgExpCol_Command" />
<asp:Panel ID="pnlSubTasks" r ...
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