FIX: DataGrid Will Not Add a New Record if Fields Set in Code

Rows will not be added to an ADO Data Control's Recordset if the field values are set programmatically in the OnAddNew event of the DataGrid.

This behavior was due to a bug in the DataGrid Control (msdatgrd.ocx).

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 service packs, please see the following articles in the Microsoft Knowledge Base:

194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why  (http://support.microsoft.com/kb/194022/EN-US/ )

194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed  (http://support.microsoft.com/kb/194295/EN-US/ )

Steps to Reproduce Behavior

This code uses the Biblio database that comes with Visual Basic.

1. Start Visual Basic 6.0 and create a new EXE project. Form1 is added by default.
2. Add the following two controls to the default form:

   Microsoft ADO Data Control 6.0 (OLEDB)
   Microsoft DataGrid Control 6.0 (OLEDB)
   					

3. Set the properties of the ADO Data Control, ADODC1, as follows:

   ConnectionString  Provider=Microsoft.Jet.OLEDB.3.51;DataSource=
                     C:\ProgramFiles\Microsoft Visual Studio\VB98\Biblio.mdb
   RecordSource
                     "SELECT * FROM Authors"
   					

4. Set the properties of the DataGrid, DataGrid1, as follows:

   DataSource        ADODC1
   AllowAddNew       True
   TabAction         2-dbgGridNavigation
   					

5. Add following code to the default form:

      Private Sub DataGrid1_OnAddNew()
         DataGrid1.Columns("Author").Text = "Test"
         DataGrid1.Columns("Year Born").Text = 1996
      End Sub
   					

6. Run the project. Go to the last record in the DataGrid (the blank row) and click on any cell. The second and third columns will have the default values "Test" and "1999" entered. Continue tabbing through the cells so that the new record gets updated.
7. End the program , and then run again. Note that the new row has not actually been added.