信德隨想

原來linq對於List及DataTable在做join寫法是不同的，try了很久

log下來囉！

泛型的範例

var var1 =  (from d10 in d0

                        join d11 in d1 on new { d10.companyno, d10.chkdebtno, d10.itemno }

                                          equals new { d11.companyno, d11.chkdebtno, d11.itemno }

                        where d10.discounttype == "N"

                         select new

                         {

                             outqty = d11.outqty

                             ,outprice = d11.outprice

                             ,outbackqty =d11.outbackqty

                            ,outbackprice = d11.outbackprice

                         }).ToList();

datatable的範例

DataTable   inbal = (from x in dtBal.AsEnumerable()

                             join z in dtBat.AsEnumerable()

                                 on new {  companyno=x.Field<string>("companyno"),partno= x.Field<string>("partno") } equals

                                 new {companyno=z.Field<string>("companyno") ,partno=z.Field<string>("partno") }

                             select x).CopyToDataTable() ;