BUG: OpenResultset Doesn't Fire QueryComplete in Class Module

• Microsoft Visual Basic Enterprise Edition for Windows, version 5.0

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

   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.

Keywords          : vb5all VBKBDB VBKBNet VBKBObj VBKBRDO
Version           : 5.0
Platform          : WINDOWS
Issue type        : kbbug