C#中连接DataTable的方法

C#中连接DataTable的方法(3)               

                table.BeginLoadData();

                foreach(DataRow firstrow in ds.Tables[0].Rows)

                {

                    //得到行的数据

                    DataRow[] childrows = firstrow.GetChildRows(r);

                    if(childrows != null && childrows.Length > 0)

                    {

                        object[] parentarray = firstrow.ItemArray;

                        foreach(DataRow secondrow in childrows)

                        {

                            object[] secondarray = secondrow.ItemArray;

                            object[] joinarray = new object[parentarray.Length+secondarray.Length];

                            Array.Copy(parentarray,0,joinarray,0,parentarray.Length);

                            Array.Copy(secondarray,0,joinarray,parentarray.Length,secondarray.Length);

                            table.LoadDataRow(joinarray,true);

                        }

                    }

                }

                table.EndLoadData();

            }