protected void Page_Load(object sender, EventArgs e)
{
Employee Emp= new Employee ();
DataTable dt = Emp.Hierarchy();
if (dt.Rows.Count != 0)
{
GridView1.DataSource = Emp.Hierarchy();
GridView1.DataBind();
}
else
{
dt.Rows.Add(dt.NewRow());
GridView1.DataSource = dt;
GridView1.DataBind();
GridView1.Rows[0].Visible = false;
}
}