Question

i’m new to LINQ and i’m facing a problem, here what i try to get:

Table A:
Field: Name A
Field: Id_A

Table B:
Field: Name B
Field: TableA_Id_A As New List(Of String)

Result Expected:
Field: New value true or false: to indicate if Id_A is include in Table B.TableA_Id_A
Field: Name A
Field: Id_A

In fact i want to list in grid the table A with a column which contains a checkbox and is checked if the item is include in table B (field TableA_Id_A).

Answer 1

Try this:

var result = TableA.Select(a=> New{ exist = TableB.TableA_Id_A.Contains(a.Id_A), NameA = a.NameA, IdA = a.IdA})

Check about linq synatx here: LINQ: .NET Language-Integrated Query
select new in linq