protected void btnstandard_Click(object sender, EventArgs e)
 {
     try
     {
         Whitfieldcore _wc = new Whitfieldcore();
         Boolean IsIns  = _wc.PopulateStandardMaterial(Convert.ToInt32(Request.QueryString["EstNum"]));
         DataSet dsGridMaterials = _wc.GetMaterialForEsitmation(Convert.ToInt32(Request.QueryString["EstNum"]));
         this.PopulateDataGrid(dsGridMaterials, grdEstimateMaterials);
     }
     catch (Exception)
     {
         throw;
     }
 }