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Populate combo box with filtered data (SQL Tabls) before main query runs

Last Modified: 2012-08-18
Hi Experts.

I have a windows form that pulls data into a gridview based on a few controls.

There are from and to dates and a CheckListBox that determin which Shafts should be included in the gridview, the last filter is a combobox "CbxTeamLeader". what I need to do is once the Shafts Get selected in the checkbox ONLY the teams specific to the shafts must populate the combo box then based on that selection, the gridview gets updated

The Original Code looks like this (Thank you Ark for making this possible so far)
Dim dt As New DataTable
Dim strSQL As String = "SELECT * FROM Performance WHERE [Date] BETWEEN @DateFrom AND @DateTo"
Dim lstFilters As New List(Of String)
For Each s As String In ClbShaftSelect.CheckedItems
     lstFilters.Add(String.Format("(Shaft='{0}')", s))
If lstFilters.Count > 0 Then
    strSQL += " AND (" & String.Join(" OR ", lstFilters.ToArray) & ")"
End If
If CbxTeamLeader.SelectedIndex > 0 Then 'or
'If  CbxTeamLeader.Text<>"" Then
    strSQL += " AND (TeamLeader='" & CbxTeamLeader.Text & "')"
End If

       Using conn As New SqlClient.SqlConnection(connString)
            Using da As New SqlClient.SqlDataAdapter(strSQL, conn)
                da.SelectCommand.Parameters.AddWithValue("@DateFrom", dateFrom)
                da.SelectCommand.Parameters.AddWithValue("@DateTo", dateTo)
            End Using
        End Using

Return dt

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