DataTable添加列

dataTable.Columns.Add(new DataColumn("STATUS_New", Type.GetType("System.String")));
           foreach (DataRow row in dt.Rows)
           {
               row["STATUS_New"] = row["STATUS"];
           }

 

DataColumndc = newDataColumn();
            dc.ColumnName = "Description";
            dc.Caption = "Description";
            dc.DefaultValue = "123";

dt.Columns.Add(dc);