ACC2000: Can't Add or Delete Records with ADO AddNew or Delete Method

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

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

Microsoft provides programming examples for illustration only, without warranty either expressed or implied. This includes, but is not limited to, the implied warranties of merchantability or fitness for a particular purpose. This article assumes that you are familiar with the programming language that is being demonstrated and with the tools that are used to create and to debug procedures. Microsoft support engineers 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 requirements. To allow additions and deletions, open the recordset with a lock type of either adLockOptimistic or adLockPessimistic, as in the following code sample: NOTE: You can use this sample code to resolve the behavior in the "Steps to Reproduce Behavior" section of this article.

Steps to Reproduce Behavior

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

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

2. 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
   					

3. NOTE: The sample code in this article uses Microsoft ActiveX Data Objects. For this code to run properly, you must reference the Microsoft ActiveX Data Objects 2.x Library (where 2.x is 2.1 or later.) To do so, click References on the Tools menu in the Visual Basic Editor, and make sure that the Microsoft ActiveX Data Objects 2.x Library check box is selected.
   
   Create a module and type the following line in the Declarations section if it is not already there:

   Option Explicit
   					

4. Type the following procedure:

    
   Sub DelFirstRec()
      Dim rs As New ADODB.Recordset
   
      rs.Open "Select * from TestTable", CurrentProject.Connection, adOpenKeyset
      rs.MoveFirst
      rs.Delete
      rs.Close
   End Sub
   					

5. 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.

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.