GridView Is not firing onrowcommand for checkbox please help

Question

 

I don't want to use loop for our work.I want that after select check box pic a value of checkbox and add in a array with out using loop. 

This is check box 

<asp:CheckBox runat="server" ID="chkselect" CommandArgument='<%# Eval("hnysku") %>'

CommandName="chkboxselect" AutoPostBack="true" />

  

Here rowcommand is not working 

 

Please help 

 

 

 

<asp:GridView ID="GRDProducts" runat="server" AutoGenerateColumns="false" ShowHeader="true" AllowSorting="false"

OnRowCommand="GRDProducts_RowCommand" CssClass="table table-striped table-bordered Datatablewithsorting">

<Columns>

<asp:TemplateField HeaderText="Sno">

<ItemTemplate>

<%# Container.DataItemIndex+1 %>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="SKU">

<ItemTemplate>

<asp:Label runat="server" ID="lblSku" Text='<%# Eval("hnysku") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Product Name">

<ItemTemplate>

<asp:Label runat="server" ID="lblProdname" Text='<%# Eval("title") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Select">

<ItemTemplate>

<asp:UpdatePanel runat="server" ID="updategrid">

<ContentTemplate>

<asp:CheckBox runat="server" ID="chkselect" CommandArgument='<%# Eval("hnysku") %>'

CommandName="chkboxselect" AutoPostBack="true"  />

</ContentTemplate>

</asp:UpdatePanel>

</ItemTemplate>

</asp:TemplateField>

</Columns>

<HeaderStyle BackColor="#066b04" ForeColor="#ffffff" />

</asp:GridView>