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Populate DBCombo at run time

Posted on 2004-04-02
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Last Modified: 2007-12-19
I have a simple form with a DBCombo that I want to populate from a field from and SQL database. I can make the connection ok, but can't get anything but the first record to add to the combo. Here is what I have so far.

Private Sub Form_Load()
Dim rs As ADODB.Recordset
Dim vSQL As String
Dim vUsers() As String
Dim x As Integer
    Set rs = New ADODB.Recordset
    GetServerFromReg 'Gets server connection info from registry *WORKING*
    Open_Conn 'This opens the connection *WORKING*
    vSQL = "SELECT pUser from tblMembers"
    rs.Open vSQL, intCon, adOpenStatic, adLockOptimistic, adCmdText
    Set cmbUser.DataSource = rs 'Seems to be working

'**This is where I think I am missing something unless I am totally on the wrong track.

    cmbUser.Refresh
End Sub
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Comment
Question by:nacilep
  • 6
  • 3
9 Comments
 
LVL 19

Accepted Solution

by:
Shauli earned 125 total points
ID: 10745523
Private Sub Form_Load()
Dim rs As ADODB.Recordset
Dim vSQL As String
Dim vUsers() As String
Dim x As Integer
    Set rs = New ADODB.Recordset
    GetServerFromReg 'Gets server connection info from registry *WORKING*
    Open_Conn 'This opens the connection *WORKING*
    vSQL = "SELECT pUser from tblMembers"
    rs.Open vSQL, intCon, adOpenStatic, adLockOptimistic, adCmdText
    With rs
        Do Until .EOF
            cmbUser.AddItem !pUser
            .MoveNext
        Loop
    End With
    rs.Close
End Sub

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0
 

Author Comment

by:nacilep
ID: 10745541
That would work with a normal combobox, but the recordset is > 500 and that is extremely slow. I was hoping that using a data bound control would speed up the process.
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LVL 19

Expert Comment

by:Shauli
ID: 10745560
The speed really depends on a) your connection, b) the aql statement. 500 or so sould be slow.

S
0
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LVL 19

Expert Comment

by:Shauli
ID: 10745562
Shouldn't be slow :)

S
0
 
LVL 19

Expert Comment

by:Shauli
ID: 10745591
btw, I assume that the major consuming time is opening the connection, and not loading the data to the combo.

S
0
 

Author Comment

by:nacilep
ID: 10745653
Opening the connection takes no time at all.

It is the loop for populating a normal combobox. I am trying to use a DBCombo which can't use the .AddItem method.

0
 
LVL 19

Expert Comment

by:Shauli
ID: 10745699
Well, the only way I know to have all records in the combo is to loop through the records.

S
0
 

Author Comment

by:nacilep
ID: 10748231
Well, this does seem to be the only answer I could find. I had it working that way before, but since I didn't clarify that, points awarded.

I'll ask another question on this, but when I do the combo update that way the form basically 'freezes' (I put a progress bar in to show the user how long is left). Is this easily fixable?
0
 
LVL 19

Expert Comment

by:Shauli
ID: 10748612
Yes, add DoEvents to the sub, as in:

 Private Sub Form_Load()
Dim rs As ADODB.Recordset
Dim vSQL As String
Dim vUsers() As String
Dim x As Integer

DoEvents '<<<<<<<<<<<<<<<<<<<<<<<<<<

    Set rs = New ADODB.Recordset
    GetServerFromReg 'Gets server connection info from registry *WORKING*
    Open_Conn 'This opens the connection *WORKING*
    vSQL = "SELECT pUser from tblMembers"
    rs.Open vSQL, intCon, adOpenStatic, adLockOptimistic, adCmdText
    With rs
        Do Until .EOF
            cmbUser.AddItem !pUser
            .MoveNext
        Loop
    End With
    rs.Close
End Sub

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