Button Outside Gridview not firing once click on Edit button of gridview - asp.net

Question

I have a gridview and i have two buttons edit and delete.Once i click on edit button, i take the values and put those in textboxes outside grid and visible update and cancel button. but that does not fires..
<asp:UpdatePanel ID="UpdatePanel2" runat="server">
<ContentTemplate>
<asp:Panel ID="pnladdproduct" runat="server">
<div class="mws-form-col-1-8">
<asp:Label ID="Label11" runat="server" AssociatedControlID="btnAddProduct"> </asp:Label>
<div class="mws-form-item large">
<asp:Button ID="btnAddProduct" ValidationGroup="grpProduct" runat="server" CssClass="mws-button red" Text="Add" OnClick="btnAddProduct_Click" />
</div>
</div>
</asp:Panel>
<asp:Panel ID="pnlUpdateProduct" runat="server">
<div class="mws-form-col-1-8">
<asp:Label ID="Label12" runat="server" AssociatedControlID="btnUpdateProduct"> </asp:Label>
<div class="mws-form-item large">
<asp:Button ID="btnUpdateProduct" runat="server" CausesValidation="False" CssClass="mws-button blue" Text="Update" OnClick="btnUpdateProduct_Click" />
</div>
</div>
</asp:Panel>
<asp:Panel ID="pnlCancel" runat="server">
<div class="mws-form-col-1-8">
<asp:Label ID="Label13" runat="server" AssociatedControlID="btnCancelUpdate"> </asp:Label>
<div class="mws-form-item large">
<asp:Button ID="btnCancelUpdate" CausesValidation="False" runat="server" CssClass="mws-button gray" Text="Cancel" OnClick="btnCancelUpdate_Click" />
</div>
</div>
</asp:Panel>
<div class="mws-form-col-8-8">
<asp:GridView ID="grdProduct" ShowHeaderWhenEmpty="True" CssClass="mGrid" runat="server" AutoGenerateColumns="False" AllowPaging="True" PagerStyle-CssClass="pgr" AlternatingRowStyle-CssClass="alt" OnPageIndexChanging="grdProduct_PageIndexChanging" OnRowDeleting="grdProduct_RowDeleting" OnRowEditing="grdProduct_RowEditing">
<Columns>
<asp:BoundField DataField="Name" HeaderText="Product" SortExpression="Product" />
<asp:BoundField DataField="Quantity" HeaderText="Quantity" SortExpression="Quantity" />
<asp:BoundField DataField="Rate" HeaderText="Rate" SortExpression="Rate" />
<asp:BoundField DataField="Amount" HeaderText="Amount" SortExpression="Amount" />
<asp:ButtonField ButtonType="Image" CommandName="Edit" HeaderText="Edit" ImageUrl="~/css/icons/16/edit.png" ShowHeader="True" Text="Edit" />
<asp:ButtonField ButtonType="Image" CommandName="Delete" HeaderText="Delete" ImageUrl="~/css/icons/16/delete.png" ShowHeader="True" Text="Delete" />
<asp:TemplateField HeaderText="HiddenColumn">
<HeaderTemplate>
</HeaderTemplate>
<ItemTemplate>
<asp:HiddenField ID="hdfProductID" runat="server" Value='<%# Bind("ProID") %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
<EmptyDataTemplate>
No Products Added !!
</EmptyDataTemplate>
</asp:GridView>
<div class="mws-form-row inline">
<asp:Label ID="Label15" runat="server" AssociatedControlID="txtQuantity">Total Amount</asp:Label>
<div class="mws-form-item medium">
<asp:TextBox ID="txtTotalAmount" BackColor="Beige" BorderColor="red" ReadOnly="True" CssClass="mws-textinput" runat="server"></asp:TextBox>
</div>
</div>
</div>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnUpdateProduct" EventName="Click"/>
<asp:PostBackTrigger ControlID="btnCancelUpdate" />
</Triggers>
</asp:UpdatePanel>
Server side Code..
protected void grdProduct_RowEditing(object sender, GridViewEditEventArgs e)
{
Session["proID"] = StepGetHiddenValuesFromGridControl(e.NewEditIndex);
txtQuantity.Text = grdProduct.Rows[e.NewEditIndex].Cells[1].Text;
txtRate.Text = grdProduct.Rows[e.NewEditIndex].Cells[2].Text;
txtAmount.Text = grdProduct.Rows[e.NewEditIndex].Cells[3].Text;
txtQuantity.BackColor = Color.Beige;
txtRate.BackColor = Color.Beige;
txtAmount.BackColor = Color.Beige;
//pnladdproduct.Visible = false;
//pnlUpdateProduct.Visible = true;
//pnlCancel.Visible = true;
}
protected void btnUpdateProduct_Click(object sender, EventArgs e)
{
// this code not firing
}

Answer 1

I don't think there's a need for triggers.