public void filldata()
{
Newsletter ad = new Newsletter();
DataTable dt = ad.getnewsletters();
if (dt.Rows.Count == 0)
{
Literal1.Visible = true;
GridView1.Visible = false;
}
else
{
Literal1.Visible = false;
GridView1.Visible = true;
GridView1.DataSource = dt; GridView1.DataBind();
}
}