Double click on gridview using asp.net

1./////////// HTML

<asp:GridView ID="GridView1" runat="server" DataKeyNames="ID" AutoGenerateColumns="false"

    OnRowDataBound="GridView1_RowDataBound"  OnRowCommand="GridView1_RowCommand">

    <Columns>

        <asp:BoundField DataField="Name" HeaderText="Name" />

        <asp:BoundField DataField="Country" HeaderText="Country" ItemStyle-Width="150" />

        <asp:CommandField SelectText="Select" ShowSelectButton="true" Visible="false" />

    </Columns>

</asp:GridView>

2.//////////// Event on page directory

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" EnableEventValidation="false" %>

3.////////// CS

  protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

    {

        if (e.Row.RowType == DataControlRowType.DataRow)

        {

            e.Row.Attributes.Add("ondblclick", "__doPostBack('GridView1','Select$" + e.Row.RowIndex + "');");

            e.Row.Attributes["style"] = "cursor:pointer;";

        }

    }

  

    protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)

    {

        int index = Convert.ToInt32(e.CommandArgument);

        GridViewRow gvRow = GridView1.Rows[index];

    }