C# 替换DataTable中指定的数据

            this.mStartEndDt.AsEnumerable().Select(a =>
                 {
                     foreach (DataColumn dc in this.mStartEndDt.Columns)
                     {
                         if (dc.ColumnName == "EQUIPMENTDETAILCODE2")
                         {
                             if (a[dc].ToString() == "0")
                             {
                                 a[dc] = a[dc].ToString().Replace("0", "");
                             }                        
                         }
                     }
                     return a;
                 }).CopyToDataTable<DataRow>();