protected void btnDrawingDate_Click(object sender, EventArgs e)
 {
     Whitfieldcore _wc = new Whitfieldcore();
     if (Page.IsValid)
     {
         Boolean IsInsertSuccess = false;
         //lblTotSellPrice.text.  this goes to the baseBid in the ProjectInfo
         IsInsertSuccess = _wc.UpdateDrawingDate(ViewState["EstNum"].ToString(), txtDrawingDt.Text.Trim());
         lblMsg.Text = "Your record is added successfully.";
         Server.Transfer("whitfield_estimation.aspx?EstNum=" + ViewState["EstNum"].ToString());
     }
 }