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Microsoft KB Archive/170149

From BetaArchive Wiki

Article ID: 170149

Article Last Modified on 7/15/2004



APPLIES TO

  • Microsoft Visual Basic 5.0 Learning Edition
  • Microsoft Visual Basic 6.0 Learning Edition
  • Microsoft Visual Basic 5.0 Professional Edition
  • Microsoft Visual Basic 6.0 Professional Edition
  • Microsoft Visual Basic 5.0 Enterprise Edition
  • Microsoft Visual Basic 6.0 Enterprise Edition
  • Microsoft Visual Basic 4.0 Standard Edition
  • Microsoft Visual Basic 4.0 Professional Edition
  • Microsoft Visual Basic 4.0 Professional Edition
  • Microsoft Visual Basic 4.0 16-bit Enterprise Edition
  • Microsoft Visual Basic 4.0 32-Bit Enterprise Edition



This article was previously published under Q170149

SYMPTOMS

The Name property of a DAO Recordset object is limited to 256 characters. It only reports the first 256 characters of the SQL statement used to create the new Recordset. If the SQL statement is longer than 256 characters, and you refresh the Data Control in the code later on, you will receive one of the following errors:

"Run-time error '3061': Too few parameters. Expected 1."

"Run-time error '3075': Syntax error in string in query expression 'xxxx'."

CAUSE

When you set the Data Control's Recordset property to an existing Recordset, it obtains its RecordSource property from the DAO Recordset's Name property, which allows a maximum length of 256 characters.

RESOLUTION

Store the SQL statement into a string variable. Before refreshing the Data Control, set its RecordSource Property to this variable. For example:

   Data1.RecordSource = SQLStr
   Data1.Refresh
                

STATUS

This behavior is by design.

MORE INFORMATION

Steps to Reproduce Behavior

  1. Start a new project in Visual Basic. Form1 is created by default.
  2. Add a Data Control(Data1) and a CommandButton (Command1) to Form1.
  3. In the Click event of Command1, place the following code:

          Private Sub Command1_Click()
            Dim DB As Database, RS As Recordset
            Dim SQLStr As String
    
            Set DB = DBEngine.Workspaces(0).OpenDatabase("Biblio.MDB")
    
            'This SQL Statement cause Run-time error 3075.
            SQLStr = "Select PubID, Name, [Company Name], Address, " _
             & "City, State, PubID, Name, [Company Name], Address, City, " _
             & "State, PubID, Name, [Company Name], Address, City, State, " _
             & "PubID, Name, [Company Name], Address, City, State " _
             & "from Publishers Where PubID = 2 and State = 'MA'"
    
            'This SQL Statement cause Run-time error 3061.
            'SQLStr = "Select PubID, Name, [Company Name], Address, City, " _
            ' & "State, PubID, Name, [Company Name], Address, City, State, " _
            ' & "PubID, Name, [Company Name], Address, City, State, " _
            ' & "PubID, Name, [Company Name], Address, City, State, " _
            ' & "PubID from Publishers Where PubID = 2 and State = 'MA'"
    
            Set RS = DB.OpenRecordset(SQLStr, dbOpenDynaset)
            Set Data1.Recordset = RS
            Debug.Print RS.Name
            Debug.Print Data1.RecordSource
            Data1.Refresh
    
          End Sub
                            
  4. Start the program by pressing the F5 key.
  5. Click the Command1 button to execute the code. You will receive one of the errors listed above.



Additional query words: kbVBp400 kbVBp500 kbVBp600 kbdse kbDSupport kbVBp kbrdo

Keywords: kbprb KB170149