ACC2000: Can't Delete Records with ADO Delete Method

ID: Q225899

The information in this article applies to:

Microsoft Access 2000

Advanced: Requires expert coding, interoperability, and multiuser skills.

This article applies to a Microsoft Access database (.mdb) and a Microsoft Access project (.adp).

SYMPTOMS

When you are using ActiveX Data Objects (ADO), if you use the Delete method of the Recordset object, and you open the recordset with an unspecified lock type, you may receive the following error message:

Run-time error '3251'
The operation requested by the application is not supported by the provider.

CAUSE

By default, ADO recordsets are opened with a lock type of adLockReadOnly, which does not allow deletions.

RESOLUTION

Microsoft provides programming examples for illustration only, without warranty either expressed or implied, including, but not limited to, the implied warranties of merchantability and/or fitness for a particular purpose. This article assumes that you are familiar with the programming language being demonstrated and the tools used to create and debug procedures. Microsoft support professionals can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific needs. If you have limited programming experience, you may want to contact a Microsoft Certified Solution Provider or the Microsoft fee-based consulting line at (800) 936-5200. For more information about Microsoft Certified Solution Providers, please see the following page on the World Wide Web:

http://www.microsoft.com/mcsp/

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http://www.microsoft.com/support/supportnet/overview/overview.asp

To allow deletions, open the recordset with a lock type of either adLockOptimistic or adLockPessimistic, as in the following code sample:


Sub DelFirstRec()
   Dim rs As ADODB.Recordset
   Set rs = New ADODB.Recordset

   rs.Open "Select * from TestTable", CurrentProject.Connection, _
            adOpenKeyset, adLockOptimistic
   rs.MoveFirst
   rs.Delete
   rs.Close
End Sub

NOTE: You can use this sample code to resolve the behavior in the "Steps to Reproduce Behavior" section of this article.

MORE INFORMATION

Steps to Reproduce Behavior

In a new Access database, create the following new table called TestTable:


   Table: TestTable
   ----------------------------
   Field Name: ID
   Data Type: Counter
   Indexed: Yes (No Duplicates)

   Field Name: Name
   Data Type: Text

Open the new table in Datasheet view and type the following test data:


   ID    Name
   -----------------
   1    Beverages
   2    Condiments
   3    Confections
   4    Dairy
   5    Grains
   6    Meat
   7    Produce
   8    Seafood

NOTE: The sample code in this article uses Microsoft ActiveX Data Objects. For this code to run properly, you need to reference the Microsoft ActiveX Data Objects 2.1 Library.

Create a module and type the following line in the Declarations section if it is not already there:


Option Explicit

Type the following procedure:

 
Sub DelFirstRec()
   Dim rs As New ADODB.Recordset

   rs.Open "Select * from Table1", CurrentProject.Connection, adOpenKeyset
   rs.MoveFirst
   rs.Delete
   rs.Close
End Sub

To test this function, type the following line in the Immediate window, and then press ENTER:
DelFirstRec
Note that you receive the error message described in the "Symptoms" section of this article. Also, when you check the table, you see that no records have been deleted.

REFERENCES

For more information about ADO recordsets, in the Visual Basic Editor, click Microsoft Visual Basic Help on the Help menu, type "ado recordset" in the Office Assistant or the Answer Wizard, and then click Search to view the topic.

Additional query words: pra prb

Keywords : kbdta
Version : WINDOWS:2000
Platform : WINDOWS
Issue type : kbprb