一個結合where、group、orderby的linq語法

這個linq語法是之前在寫winform程式時，將DataSet的資料再整理過後，轉成dataTable的語法

可以當作以後參考用，先log下來

因為有時候在寫linq時，會忘記，得要把辛苦寫出來的結果留下來的好.

DataTable dt = (from x in dsResult.Tables[0].AsEnumerable()

                                where DataTrans.CBoolean(x["IsChecked"]) == true

                                group x by new

                                {

                                    no = x.Field<string>("NO"),

                                    ptno = x.Field<string>("PTNO"),

                                    ver = x.Field<int>("VER"),

                                    kd = x.Field<string>("KD"),

                                    que_da = Convert.ToDateTime(x.Field<DateTime>("QUE_DA").ToString("yyyy/MM/dd"))

                                } into g

                                orderby g.Key.no,g.Key.ptno,g.Key.ver,g.Key.kd,g.Key.que_da

                                select new

                                {

                                    qty = g.Sum(x => Convert.ToInt32(x["QUE_QTY"])),

                                  stock=g.Sum(x=>Convert.ToInt32(x["STOCK"])),

                                  no=g.Key.no ,

                                  ptno=g.Key.ptno,

                                  ver=g.Key.ver,

                                  kd=g.Key.kd,

                                  que_da=g.Key.que_da

                                }).ConvertDataTable();