Linq-to-sql error: 'int[]' does not contain a definition for 'Contains'

Question

I am having an error:

Error 2 'int[]' does not contain a definition for 'Contains' and the best extension method overload 'System.Linq.Enumerable.Contains(System.Collections.Generic.IEnumerable, TSource)' has some invalid arguments

This is my code:

public partial class mymymy : System.Web.UI.Page
{
    int[] validType = { 2, 3, 4, 5, 6, 8, 13, 14, 16, 22 };

    protected void Page_Load(object sender, EventArgs e)
    {
    }

    protected void LinqDataSource_Selecting(object sender, LinqDataSourceSelectEventArgs e)
    {
        using (var dc = new soxMainDataContext())
        {
            var qry = from item in dc.LeaveRequests
                  where **validType**.Contains(item.Type)
                      && item.MgtApproval == null
                  select item;
            e.Result = qry;
        }
    }
}

What data type is the property item.Type ? – Jørn Schou-Rode Jul 01 '09 at 13:24 — Jørn Schou-Rode, Jul 01 '09 at 13:24

score 50 · Accepted Answer · answered Jul 01 '09 at 13:24

50

I strongly suspect that item.Type isn't an int. Is it an enum? If so, try explicitly casting:

var qry = from item in dc.LeaveRequests
          where validType.Contains((int) item.Type)
                && item.MgtApproval == null
          select item;

Alternatively, as dot notation:

var query = dc.LeaveRequests.Where(item => validType.Contains((int) item.Type)
                                           && item.MgtApproval == null);

answered Jul 01 '09 at 13:24

Jon Skeet

1,421,763
867
9,128
9,194

What if item.Type is an int? (Null able int ) – Avneesh Srivastava Jun 03 '16 at 07:08
@AvneeshSrivastava: Then it would depend on what type `validType` was, and what you'd want to do if `item.Type` is null. Assuming this is a problem you're currently facing, I suggest you try various things and then ask a new question with all the relevant details if necessary. – Jon Skeet Jun 03 '16 at 07:19
Hi Jon yes I am facing that issue I have asked a new question http://stackoverflow.com/q/37608704/2794391 I have also trying many things from morning please help me out. – Avneesh Srivastava Jun 03 '16 at 07:44
and in case item.Type is null-able int. use the item.Type.Value – Dileep Aug 09 '19 at 18:49

score 4 · Answer 2 · answered Jul 01 '09 at 13:24

4

item.Type isn't an int.

answered Jul 01 '09 at 13:24

mqp

70,359
14
95
123

score 3 · Answer 3 · edited May 21 '16 at 20:09

3

var consulta = from pr in lsprodcts 
               where pr.nProductoID.ToString().Contains(Idproducto.ToString())
               select new
               {
                   pr.nProductoID,
                   ProdName = pr.cNombre,
                   pr.cDescripcion,
               };

`

edited May 21 '16 at 20:09

Sherif Ahmed

1,896
1
19
37

answered Oct 29 '10 at 15:28

navi_osoro

31
1

score 0 · Answer 4 · answered Jan 10 '23 at 16:32

0

Don't forget to import Linq with using System.Linq; at the very top of the class.

answered Jan 10 '23 at 16:32

Codingwiz

192
2
14

Linq-to-sql error: 'int[]' does not contain a definition for 'Contains'

4 Answers4

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