FIX: DataGrid Column Widths Incorrect When Using MDAC 2.1

ID: Q223078

The information in this article applies to:

Microsoft Visual Basic Enterprise Edition for Windows, version 6.0

SYMPTOMS

The width of a DataGrid column bound to an ADO field of type adBSTR is very narrow under MDAC 2.1 compared to the width of an adBSTR column under MDAC 2.0.

CAUSE

A bug fix in MDAC 2.1 changed the return value for GetColumnInfo calls on columns of type adBSTR. This fix exposed a limitation in the DataGrid control(MSDATGRD.OCX).

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products 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 service packs, please see the following articles in the Microsoft Knowledge Base:

Q194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

Q194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed

MORE INFORMATION

Steps to Reproduce Behavior

To create this project, you must have MDAC 2.1 installed.

Start Visual Basic 6.0.

Create a Standard EXE project. Form1 is created by default.

Add the following Project References:

Microsoft ActiveX Data Objects 2.1 Library

Add the following Project Components:

Microsoft DataGrid Control 6.0 (OLEDB)

Add the following control to Form1:

1 - Microsoft DataGrid Control 6.0 (OLEDB)

Paste the following code into Form1's Code Window:


Private rs As ADODB.Recordset

Private Sub Form_Load()

    'Create a new empty recordset with six fields
    Set rs = New ADODB.Recordset
    
    With rs
       .Fields.Append "Column1", adBSTR, 25
       .Fields.Append "Column2", adInteger
       .Fields.Append "Column3", adBSTR, 25
       .Fields.Append "Column4", adVarChar, 25
       .Fields.Append "Column5", adBSTR, 25
       .Fields.Append "Column6", adDBTimeStamp, 25
       .Open
    End With
   
   'Bind the DataGrid to the new empty recordset
    Set Me.DataGrid1.DataSource = rs

End Sub

Run the project. Note the narrow widths of Column1, Column3, and Column5, which display the adBSTR fields.

Additional query words:

Keywords : kbservicepack kbCtrl kbVBp600bug kbVS600sp2 kbVS600SP1 kbVS600sp3fix kbGrpVBDB
Version : WINDOWS:6.0
Platform : WINDOWS
Issue type : kbbug