How to find Grid view row index value using command argument on button click

Question

<asp:TemplateField HeaderText="DELETE" HeaderStyle-CssClass="sfDelete">

                        <ItemTemplate>

  <asp:ImageButton ID="imbDelete" runat="server" CausesValidation="False" CommandArgument="<%# ((GridViewRow) Container).RowIndex %>"

                                CommandName="Delete"   ToolTip="Delete the enquiry" />

</ItemTemplate>

                                </asp:TemplateField>

Fire Event of grid view row Command..

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protected void gdvRecord_RowCommand(object sender, GridViewCommandEventArgs e)

    {

        

        if (e.CommandName == "EDIT")

        {

            int RowNum = int.Parse(e.CommandArgument.ToString());

}

}