GridView rowcommand inside modal popup not fired.

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Gridview

Hello..

I want to get value of row command when user click a button inside gridview.

The gridview is in a modal popup, the modal popup is in tab container and the tab container is inside master page.

The problem is gridview_rowcommand not fired.

I've tried another method which calls button click event. But nothing happens too.

Here's the code for button click. The button click event is shared by 15 other buttons so that I didnt put 'handles button.click'

 Protected Sub btn_Click(sender As Object, e As EventArgs)

ModalPopupExtender1.PopupControlID = "PanelShowMC"
        ModalPopupExtender1.TargetControlID = "PanelShowMC"
        ModalPopupExtender1.Show()

        ' MsgBox("FIRED!")
        Dim mainContent As ContentPlaceHolder = DirectCast(Me.Master.FindControl("MainContent"), ContentPlaceHolder)
        Dim tabCon As AjaxControlToolkit.TabContainer = DirectCast(mainContent.FindControl("TabContainer1"), AjaxControlToolkit.TabContainer)
        Dim tabPan As AjaxControlToolkit.TabPanel = DirectCast(tabCon.FindControl("TabPanel1"), AjaxControlToolkit.TabPanel)

        Dim gridv As GridView = DirectCast(tabPan.FindControl("gdShowArea"), GridView)

        Dim aaa As AsyncPostBackTrigger = New AsyncPostBackTrigger
        aaa.ControlID = gridv.UniqueID
        aaa.EventName = "gdShowArea_RowCommand"
        Dim btn As Button = sender
        MsgBox(btn.ID)

End Sub

HTML:

<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server" >
 <asp:ScriptManager ID="ScriptManager1" runat="server">
                          </asp:ScriptManager>
<cc1:TabContainer ID="TabContainer1" runat="server" ActiveTabIndex="0"
        Width ="1250px" Height="2000px"
                CssClass="Tab" >
                <cc1:TabPanel ID="TabPanel1" runat="server" HeaderText="Machine Layout">

<HeaderTemplate> Machine Layout </HeaderTemplate>

<ContentTemplate>

<pre><cc1:ModalPopupExtender ID="panelShow_ModalPopupExtender" runat="server" 
        BackgroundCssClass="ModalPopupBG" OkControlID="btnClose" 
        PopupControlID="panelShow" TargetControlID="panelShow" 
        DynamicServicePath="" Enabled="True">
    </cc1:ModalPopupExtender>
    <asp:Panel ID="panelShow0" runat="server" BackColor="White" 
        BorderColor="#009900" BorderStyle="Solid" CssClass="ModalWindow" Height="600px" 
        Width="654px">
        <br />
        &nbsp;<asp:DropDownList ID="ddlArea" runat="server">
        </asp:DropDownList>
        <asp:Button ID="btnViewKIV" runat="server" CssClass="buttonMC" Text="View" />
        <br />
        <asp:GridView ID="gdShowArea" runat="server" AutoGenerateColumns="False" 
            BorderStyle="None" Height="500px" OnRowDataBound="gdShowArea_RowDataBound" 
            ShowHeader="False" Width="96px">
            <Columns>
                <asp:TemplateField>
                    <ItemTemplate>
                        <center>
                            <asp:Button ID="btnC1" runat="server"                CausesValidation="False" 
CommandArgument="<%# Container.DataItemIndex + 1%>" 
CommandName="ViewC1" 
CssClass="btnmcdynamic" Font-Size="X-Small" Width="40px" />
                        </center>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField>
                    <ItemTemplate>
                        <center>
                        <asp:Button ID="btnC2" runat="server" CommandName="ViewC1" 
                                CssClass="btnmcdynamic" Font-Size="X-Small" Width="40px" />
                        </center>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
        <br />
        <br />
        <center>
        </center>
    </asp:Panel>

</ContentTemplate>
</cc1:TabPanel>
</cc1:TabContainer>


</asp:Content>

gdShowArea_rowcommand:

  Private Sub gdShowArea_RowCommand(sender As Object, e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles gdShowArea.RowCommand

Dim i As Integer = CType(e.CommandArgument, Integer)
 Dim area As String = Me.ddlArea.SelectedItem.Text
        Dim col As String = btn.ID.Substring(3, 2)
        Dim row As String = "R" & i

        Dim loccode As String = String.Concat(area, col, row)
    End Sub