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Combo Boxes

Find As Your Type Combobox by MajP
Posted: 21 May 06 (Edited 15 Apr 15)

The following class module turns any combo box into a "Find As You Type" combobox. In other words if you have a combobox that displays a long list of last names, as you type "J" you would see only the people with "J" as the first letter of their last name. If you type "Jo" then you will see only those people with names beginning with "Jo", etc.
It can also be initialized to find "J" or "Jo" anywhere within the field

To use, simply place the code into a class Module named "FindAsYouTypeCombo". Follow the instructions at the top of the module to instantiate the class within a form. The same idea can be modified to develop a find as you type continous form or listbox.

CODE

Option Compare Database
Option Explicit

'Class Module Name: FindAsYouTypeCombo
'Purpose: Turn any combobox into a "Find As You Type" 'Combobox
'Created by: MajP
'Demonstrates: OOP, and With Events
'
'Use: To use the class, you need a reference to DAO and code
'similar to the following in a form's module.

'Parmaters:
'  TheComboBox: Your Combobox object passed as an object
'  FilterFieldName: The name of the field to Filter as
'  string
'  FilterFromStart: Determines if you filter a field that 
'  starts with the text or if the text appears anywhere in 
'  the record.
'
'*******START: Form Code*******************
'
' Option Compare Database
' Option Explicit
' Public faytProducts As New FindAsYouTypeCombo
' Form_Open(Cancel As Integer)
'   faytProducts.InitalizeFilterCombo Me.cmbProducts, ProductName", False
' End Sub
'
'******* END: Form Code ******************


Private WithEvents mCombo As Access.ComboBox
Private WithEvents mForm As Access.Form
Private mFilterFieldName As String
Private mRsOriginalList As DAO.Recordset
Private mFilterFromStart As Boolean

Public Property Get FilterComboBox() As Access.ComboBox
  Set FilterComboBox = mCombo
End Property
Public Property Set FilterComboBox(TheComboBox As Access.ComboBox)
  Set mCombo = TheComboBox
End Property
Private Sub mCombo_Change()
  Call FilterList
End Sub
Private Sub mCombo_GotFocus()
   mCombo.Dropdown
End Sub
Private Sub mCombo_AfterUpdate()
  Call unFilterList
End Sub
Private Sub mForm_Current()
  Call unFilterList
End Sub
Private Sub FilterList()
  On Error GoTo errLable
  Dim rsTemp As DAO.Recordset
  Dim strText As String
  Dim strFilter As String
  strText = mCombo.Text
  If mFilterFieldName = "" Then
    MsgBox "Must Supply A FieldName Property to filter list."
    Exit Sub
  End If
  If mFilterFromStart = True Then
    strFilter = mFilterFieldName & " like '" & strText & "*'"
  Else
    strFilter = mFilterFieldName & " like '*" & strText & "*'"
  End If
  Set rsTemp = mRsOriginalList.OpenRecordset
  rsTemp.Filter = strFilter
  Set rsTemp = rsTemp.OpenRecordset
  If rsTemp.RecordCount > 0 Then
    Set mCombo.Recordset = rsTemp
  End If
  mCombo.Dropdown
  Exit Sub
errLable:
  If Err.Number = 3061 Then
    MsgBox "Will not Filter. Verify Field Name is Correct."
  Else
    MsgBox Err.Number & "  " & Err.Description
  End If
End Sub
Private Sub unFilterList()
  On Error GoTo errLable
  Set mCombo.Recordset = mRsOriginalList
   Exit Sub
errLable:
  If Err.Number = 3061 Then
    MsgBox "Will not Filter. Verify Field Name is Correct."
  Else
    MsgBox Err.Number & "  " & Err.Description
  End If
End Sub
Public Property Get FilterFieldName() As String
  FilterFieldName = mFilterFieldName
End Property
Public Property Let FilterFieldName(ByVal theFieldName As String)
  mFilterFieldName = theFieldName
End Property
Private Sub Class_Initialize()
    
End Sub
Private Sub Class_Terminate()
    Set mForm = Nothing
    Set mCombo = Nothing
    Set mRsOriginalList = Nothing
End Sub
Public Sub InitalizeFilterCombo(TheComboBox As Access.ComboBox, FilterFieldName As String, Optional FilterFromStart = True)
   On Error GoTo errLabel
   If Not TheComboBox.RowSourceType = "Table/Query" Then
      MsgBox "This class will only work with a combobox that uses a Table or Query as the Rowsource"
      Exit Sub
   End If
   Set mCombo = TheComboBox
   Set mForm = TheComboBox.Parent
   mFilterFieldName = FilterFieldName
   mFilterFromStart = FilterFromStart
   mForm.OnCurrent = "[Event Procedure]"
   mCombo.OnGotFocus = "[Event Procedure]"
   mCombo.OnChange = "[Event Procedure]"
   mCombo.AfterUpdate = "[Event Procedure]"
   With mCombo
     .SetFocus
     .AutoExpand = False
   End With
   Set mRsOriginalList = mCombo.Recordset.Clone
   Exit Sub
errLabel:
    MsgBox Err.Number & " " & Err.Description
End Sub 

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