ASP.NET Ajax ConfirmButtonExtender不起作用

Question

以下是3个步骤中的问题：

1 - 按下ConfirmButtonExtender btn0

2 - 弹出窗口，里面有2个按钮（确认和取消）

3 - 按下确认按钮然后调用btn0_Click

我希望第一次按下btn0时可以打电话

的.aspx

<asp:Button runat="server" ID="btn0" Text="OK" OnClick="btn0_Click" />    

<cc1:ConfirmButtonExtender ID="ConfirmButtonExtender_GetHour"
runat="server" TargetControlID="btn0" OnClientCancel=""
DisplayModalPopupID="ModalPopupExtender_GetHour"
ConfirmOnFormSubmit="true" 
ConfirmText="yo?" />

<br /> 

<cc1:ModalPopupExtender ID="ModalPopupExtender_GetHour"
runat="server" PopupControlID="PNL_getHour"
TargetControlID="btn0" OkControlID="ButtonOk_GetHour"
CancelControlID="ButtonCancel_GetHour"
Enabled="True"> </cc1:ModalPopupExtender>


<asp:Panel ID="PNL_getHour" runat="server">
   POPUP WITH A BUTTON AND A CANCELBUTTON
</asp:Panel>

的.cs

protected void btn0_Click(object sender, EventArgs e)
{
     //I WANT THIS METHOD TO WORK WHEN BTN0 IS PRESSED 
     //AND NOT WHEN THE POPUP'S CONFIRM BUTTON IS PRESSED
}