Question

如果我有一个DataTable userwidget，其中包含以下列：

process_id，emp_num，widget_color

如何根据以下条件使用DataTable过滤此LINQ：

1- WHERE emp_num = ...

2-和process_id NOT IN (process)//process is an array of intgers

Answer 1

var filtered = (from row in tbl.AsEnumerable()
               where row.Field<int>("emp_num")==yourNum
               && !process.Contains(row.Field<int>("process_id"))
               select row).CopyToDataTable();

Answer 2

使用，where <list>.Contains( <item> )

 var lstprocessid = {1, 2, 3};
  var   rows =
        (from datatable in dtDetails.AsEnumerable()
          where !lstprocessid.Contains(int.parse((datatable["process_id "]).ToString())
              &&  int.parse((datatable["emp_num"]).ToString())== myemp_num     
                     select datatable).ToList<DataRow>();

如何通过数组中未包含的值过滤DataTable？

2 个答案: