Unique values in two different comboboxes in a form....

raghuprabhu

New Member
Joined
Apr 8, 2017
Messages
7
Good evening All,

I have a form with 2 combo boxes.

For the first combo box, combobox1, I have has unique list from Column A as record source using the following code

Code:
Private Sub UserForm_Initialize()
    Dim myCollection As Collection
    Dim cell As Range
    
    On Error Resume Next
    Set myCollection = New Collection
        With combobox1
        .Clear
            For Each cell In Range("A2:A" & Cells(Rows.Count, 1).End(xlUp).Row)
                If Len(cell) <> 0 Then
                    Err.Clear
                    myCollection.Add cell.Value, cell.Value
                    If Err.Number = 0 Then .AddItem cell.Value
                End If
            Next cell
        End With
    combobox1.ListIndex = 0
End Sub

How do I change it to include a unique list as source for the second combo box, combobox2 from column E?

Thank you

Regards

Raghu Prabhu
From Chilly Melbourne.
 

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Can you give an example of what you have in both columns; and column E what data would you upload in combo2?
 
Upvote 0
Is combo2 dependant on combo1, or is it all the unique values from col E?
 
Upvote 0
If combo2 is not dependant on combo1, try
Code:
Private Sub UserForm_Initialize()
   Dim DicA As Object, DicE As Object
   Dim Cl As Range
   
   Set DicA = CreateObject("scripting.dictionary")
   Set DicE = CreateObject("scripting.dictionary")
   For Each Cl In Range("A2:A" & Cells(Rows.Count, 1).End(xlUp).Row)
      If Cl.Value <> "" Then DicA(Cl.Value) = Empty
      If Cl.Offset(, 4).Value <> "" Then DicE(Cl.Offset(, 4).Value) = Empty
   Next Cl
   With Me.ComboBox1
      .List = DicA.Keys
      .ListIndex = 0
   End With
   With Me.ComboBox2
      .List = DicE.Keys
      .ListIndex = 0
   End With
End Sub
 
Upvote 0
Thank you very much Fluff,

Your code is working like a charm!

I used the following and it works too, but sometimes one of the combo boxes does not get populated...what could be the reason?

I consider this post as solved.

Code:
Private Sub UserForm_Initialize()
    Dim myCollection1 As Collection
    Dim myCollection2 As Collection
    Dim cell As Range
    
    On Error Resume Next
    Set myCollection1 = New Collection
        With combobox1
        .Clear
            For Each cell In Range("A2:A" & Cells(Rows.Count, 1).End(xlUp).Row)
                If Len(cell) <> 0 Then
                    Err.Clear
                    myCollection1.Add cell.Value, cell.Value
                    If Err.Number = 0 Then .AddItem cell.Value
                End If
            Next cell
        End With
    combobox1.ListIndex = -1
    
    Set myCollection2 = New Collection
        With ComboBox2
        .Clear
            For Each cell In Range("E2:E" & Cells(Rows.Count, 2).End(xlUp).Row)
                If Len(cell) <> 0 Then
                    Err.Clear
                    myCollection2.Add cell.Value, cell.Value
                    If Err.Number = 0 Then .AddItem cell.Value
                End If
            Next cell
        End With
    ComboBox2.ListIndex = -1
End Sub

Kind Regards

Raghu Prabhu
 
Last edited:
Upvote 0
I used the following and it works too, but sometimes one of the combo boxes does not get populated...what could be the reason?
This
Code:
On Error Resume Next
That line will simply mask any errors encountered.
 
Upvote 0

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