Question

I have a query which selects from the db where value=combobox.selectedtext.

However, what I want to do is for the where value to check all values of the combobox.

Can someone offer advice as to how this would be done?

My sql query is this at the minute:

Dim sqlOpServ As String = ("SELECT DISTINCT col1, col2 from table1, table2 where test=test1 AND value= '" & combobox1.SelectedItem & "' ORDER BY col1 ASC")

Thanks

Answer 1

I don’t have VS right know so I I will try you help you without trying my code:

 Dim sWhere as string=""
 For i = 0 To ComboBox1.Items.Count - 1
        sSelect = sSelect & " AND value='" & ComboBox1.Items(i) & "' "
 Next

 Dim sqlOpServ As String = ("SELECT DISTINCT col1, col2 from table1, table2 where test=test1 " & sWhere & " ORDER BY col1 ASC")

After the comments:

   Dim sWhere As String = ""

    For i = 0 To ComboBox1.Items.Count - 1
        If i = 0 Then
            sWhere = " AND value='" & ComboBox1.Items(i).ToString & "' "
        Else
            sWhere = sWhere & " OR value='" & ComboBox1.Items(i).ToString & "' "
        End If

    Next

    Dim sqlOpServ As String = _
        ("SELECT DISTINCT col1, col2 from table1, table2 where test=test1 " & sWhere & " ORDER BY col1 ASC")

If you have used a datatable to fill your combobox

    Dim table As DataTable = DirectCast(Me.ComboBox1.DataSource, DataTable)
    Dim sWhere As String = ""

    For i = 0 To ComboBox1.Items.Count - 1
        Dim displayItem As String = table.Rows(i)(ComboBox1.DisplayMember).ToString()
        ' Dim valueItem As String = table.Rows(i)(ComboBox1.ValueMember).ToString() 'if you need at some point the value you can use this

        If i = 0 Then
            sWhere = " AND value='" & displayItem & "' "
        Else
            sWhere = sWhere & " OR value='" & displayItem & "' "
        End If

    Next

    Dim sqlOpServ As String = _
        ("SELECT DISTINCT col1, col2 from table1, table2 where test=test1 " & sWhere & " ORDER BY col1 ASC")

I hope I helped