protected void Txt_Itm_No_TextChanged(object sender, EventArgs e)
 {
     try
     {
         //Int64 ID = Convert.ToInt64(Txt_Itm_No.Text);
         DDL_Itm_NmAr.SelectedValue = Txt_Itm_No.Text;
         Txt_Qty.Focus();
     }
     catch
     {
         Txt_Itm_No.Text = "";
         Txt_Itm_No.Focus();
     }
 }
 protected void DDL_Itm_Unit_OnSelectedIndexChanged(object sender, EventArgs e)
 {
     Gett_Titm_Pur();
     Txt_Qty.Focus();
 }