Q172239: BUG: OpenResultset Doesn’t Fire QueryComplete in Class Module

Article: Q172239
Product(s): Microsoft Visual Basic for Windows
Version(s): 
Operating System(s): 
Keyword(s): kbGrpDSVBDB
Last Modified: 09-JAN-2000

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The information in this article applies to:

- Microsoft Visual Basic Enterprise Edition for Windows, versions 5.0, 6.0 
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SYMPTOMS
========

Program code in the QueryComplete event procedure of a rdoConnection object will
not execute if you use the OpenResultset method to execute a query in a class
module.

RESOLUTION
==========

The resolution to this problem is to call DoEvents function after opening the
resultset. For example:

     Set rs = cn.OpenResultset("select * from Authors", _
         rdOpenKeyset, rdConcurValues)
     DoEvents

If you use the OpenResultset method with the rdAsyncEnable option, you need to
use the following code to workaround the problem:

     Set rs = cn.OpenResultset("select * from Authors", _
         rdOpenKeyset, rdConcurValues, rdAsyncEnable)
     While rs.StillExecuting
         DoEvents
     Wend
     DoEvents

STATUS
======

Microsoft is researching this problem and will post new information here in the
Microsoft Knowledge Base as it becomes available.

MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

1. Start a new Standard EXE project in Visual Basic 5.0. Form1 is created by
  default.

2. Add a new Class Module (Class1) to the project.

3. Insert the following code into the General Declarations section of Class1 and
  replace ServerName with appropriate SQL server name:

        Private WithEvents cn As rdoConnection

        Private Sub cn_QueryComplete(ByVal Query As RDO.rdoQuery, _
                                    ByVal ErrorOccurred As Boolean)
          MsgBox "Query Done --> From QueryComplete Event."
        End Sub

        Public Sub QueryCompleteTest()
          Dim rs As rdoResultset
          Set cn = New rdoConnection
          With cn
             .Connect = "UID=sa;PWD=;database=pubs;" _
                 & "Server=ServerName;" _
                 & "driver={SQL Server};DSN='';"
             .QueryTimeout = 5
             .CursorDriver = rdUseClientBatch
             .EstablishConnection rdDriverNoPrompt
          End With
          Set rs = cn.OpenResultset( _
             "select * from Authors", _
             rdOpenKeyset, rdConcurValues)
          'DoEvents
        End Sub

4. Add a CommandButton (Command1) to Form1.

5. Insert the following code into the Click event of Command1:

        Private Sub Command1_Click()
          Dim ClsQuery As New Class1
          ClsQuery.QueryCompleteTest
        End Sub

6. Select Project\References, and check Microsoft Remote Data Object 2.0.

7. Press the F5 key to run the program.

8. Click on Command1. Note that the QueryComplete event is not triggered and no
  message box appears on screen.

Additional query words: kbVBp500 kbVBp600 kbdse kbDSupport kbVBp kbVBp400 kbRDO

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Keywords          : kbGrpDSVBDB 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB500Search kbVB600Search kbVB500 kbVB600
Issue type        : kbbug

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