AJAX :: Gridview Disappear After Pression Button Inside UpdatePanel?

Jan 27, 2010

I am using UpdatePanel, and I include a gridview inside the updatepanel, I want the grid to be refreshed when button1 or button2 of gridview being pressed. But now when I click the button, the gridview disappeared and look likes the whole aspx is refreshed. I just want to refresh the gridview inside updatepanel. But now the gridview is disappeared. The following is

my source code:

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Panel ID="Panel4" GroupingText="Enroll student" runat="server" > [code]....

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[Code]....

[Code]....

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[Code]....

[Code]....

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