Mvc 5 Model popup with the list of employees in grid with check box in mvc 5

"binaryintellect.net/articles/59b91531-3fb2-4504-84a4-9f52e2d65c20.aspx"
"codeproject.com/Articles/843788/WebGrid-in-ASP-NET-MVC-important-tips"

<asp:Button ID="btnShowPopup" Text="Show Popup" runat="server" Style="display: none" />
<cc1:ModalPopupExtender ID="mpe" runat="server" TargetControlID="btnShowPopup"
    PopupControlID="pnlPopup" BackgroundCssClass="modalBackground">
</cc1:ModalPopupExtender>
<asp:Panel ID="pnlPopup" runat="server" BackColor="White" Height="100px"
    Width="400px" Style="display: none">
    <table>
        <tr>
            <td>
                <asp:GridView Id="gv" runat="server" autogeneratecolumns="False"
       autogenerateselectbutton="True"
       selectedindex="1"
       onselectedindexchanged="gv_SelectedIndexChanged">
		<Columns>
		</Columns>
		</asp:GridView>
            </td>
        </tr>
        <tr>
            <td>
		<asp:HiddenField Id="hdnId" runat="server"/>
		<asp:Button Id="btnGet" runat="server" Text="Get Record" OnClick="btnGet_OnClick"/>
            </td>
        </tr>
    </table>
</asp:Panel>

  Protected void gv_SelectedIndexChanged(Object sender, EventArgs e)
  {
    GridViewRow row = gv.SelectedRow;
    hdnId.Value= row.Cells[2].Text ;
  }
     Protected void btnGet_OnClick(Object sender, EventArgs e)
     {
            //pass hidden field value to main view
     }