why does array.contains not work with array returned from function?

[polynaux]

Hi Guys,

I a function that returns an array and would like to check if this array contains
a certain string on rowdatabound of my gridview:

But.....contains is not recognized.
why does array.contains not work with array returned from function?

Many thanks

polynaux

 

[JuggaloBrotha]

It might be because of the parenthesis, try removing them from between the 'PersonalContactsArray' and the '.Contains'

 

[InertiaM]

If you do it using a List, it works fine

    Private Function PersonalContactsList() As List(Of String)
        Dim PersonalContacts As New List(Of String)
        PersonalContacts.Add("Person0")

        For i As Integer = 1 To 10
            PersonalContacts.Add(String.Format("Person{0}", i))
        Next

        Return PersonalContacts
    End Function

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If PersonalContactsList.Contains("Person1") = True Then
            MessageBox.Show("Yes")
        Else
            MessageBox.Show("No")
        End If

        If PersonalContactsList.Contains("Person37") = True Then
            MessageBox.Show("Yes")
        Else
            MessageBox.Show("No")
        End If

    End Sub

 

[JohnH]

It is correct that System.Array class doesn't have a Contains method, but collections (IList) does as mentioned. Arrays have IndexOf method that can also be used, or Exists method too.

 

[polynaux]

ok i see

hmm its strange because I have used the contains method in the same project (just another code behind file):

          Dim Lengths As Integer = GridViewAlternativeAssessmentForUserID.Rows.Count
                Dim AssessmentCriteriaArray(Lengths) As String
          
               

                                    If AssessmentCriteriaArray(Lengths).Contains(xxxx.Text) THEN....

and it works perfecty.
Now you guys tell me there is no contains method. odd.
I will try the it with lists - I have never used lists before so is there anything else I need to be aware of?

many thanks
polynaux

 

[JohnH]

You have used the String.Contains method. Like If "some text".Contains("text")

 

[polynaux]

ok

wow, did not even notice , thanks - I will stick with the list contains method then