protected void txt_tarifno_TextChanged(object sender, EventArgs e)
{
bl.tarif_no = txt_tarifno.Text;
DataSet ds = new DataSet();
ds = dl.secectterifno(bl);
if (ds.Tables[0].Rows.Count > 0)
{
ScriptManager.RegisterStartupScript(this, this.GetType(), "redirect", "alert('The Tarif No Already Exists');", true);
txt_tarifno.Focus();
txt_tarifno.Text = string.Empty;
}
else
{
Button1.Focus();
}
}