Forms Data Controls :: Adding Gridview Row Getting An Error In The Browser?

Jul 24, 2010

I have a dynamic gridview which adds row when the button is click. But I am getting an error in the browser. I managed to run this and get it working but after couple of days working, there's a wierd error occur when I click the add row button.

Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation

Here's my gridview

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" ShowFooter="True" BackColor="White" BorderColor="#E7E7FF" BorderStyle="None" BorderWidth="1px" CellPadding="3" GridLines="Horizontal" Height="288px" Width="512px">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# count() %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Question" >

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