Microsoft KB Archive/223063

= FIX: ADO AddNew After a Trap for EOF Does Not Correctly Bind Control =

Article ID: 223063

Article Last Modified on 1/11/2001

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APPLIES TO


 * Microsoft Visual Basic 6.0 Professional Edition
 * Microsoft Visual Basic 6.0 Enterprise Edition

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This article was previously published under Q223063



SYMPTOMS
When you add a new row in the EndofRecordset Event of an ADO recordset, the first field updated in the recordset will not bind properly with its control. The control does not appear to get the new value.



CAUSE
This problem is caused by the Data Binding Manager not correctly tracking the current record in the recordset.



STATUS
Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.

This bug was corrected in Visual Studio 6.0 Service Pack 3.

For more information about Visual Studio 6.0 Service Packs, please see the following articles in the Microsoft Knowledge Base:

194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed



MORE INFORMATION
The EndOfRecordset event is raised when there is an attempt to move to a row past the end of the recordset. You can add new records to a recordset in the EndOfRecordset event. Before EndOfRecordset returns, add your data, then set the fMoreData parameter to True to indicate that there is a new end to the Recordset.

Steps to Reproduce Behavior
 Start Visual Basic 6.0. Select the Standard EXE Project.  Set the following Project Reference: Microsoft ActiveX Data Objects   Add the following controls to the default form: 2 Text boxes 1 Command button   Paste the following code into the default form: Private WithEvents rs As ADODB.Recordset Private counter As Integer

Private Sub Form_Load 'Create a new empty recordset, with 2 fields Set rs = New ADODB.Recordset rs.Fields.Append "Field0", adBSTR, 20 rs.Fields.Append "Field1", adBSTR, 20 rs.Open counter = 0 rs.MoveLast 'Bind the 2 text boxes to the 2 recordset fields Text1.DataField = "Field0" Text2.DataField = "Field1" Set Text1.DataSource = rs  Set Text2.DataSource = rs End Sub

Private Sub rs_EndOfRecordset(fMoreData As Boolean, _                             adStatus As ADODB.EventStatusEnum, _                              ByVal pRecordset As ADODB.Recordset) 'The same counter value is assigned to both fields counter = counter + 1 pRecordset.AddNew pRecordset(0) = "Field 0 counter: " & CStr(counter) pRecordset(1) = "Field 1 counter: " & CStr(counter) pRecordset.Update 'Set fMoreData to True, indicating a new end of the recordset fMoreData = True End Sub Private Sub Command1_Click ' Although the same counter is assigned to Field0 and Field1, '    Text1 lags behind Text2 rs.MoveNext End Sub  Run the Project</li></ol>

As you click Command1, note how the Text1 value lags the Text2 value.

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