Q142836: HOWTO: RDO Prepared Statements/Search Crit. to Fill Listbox

Article: Q142836
Product(s): Microsoft Visual Basic for Windows
Version(s): 
Operating System(s): 
Keyword(s): kbGrpDSVBDB
Last Modified: 13-JAN-2001

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The information in this article applies to:

- Microsoft Visual Basic Learning Edition for Windows, version 6.0 
- Microsoft Visual Basic Professional Edition for Windows, version 6.0 
- Microsoft Visual Basic Enterprise Edition for Windows, version 6.0 
- Microsoft Visual Basic Enterprise Edition for Windows, version 5.0 
- Microsoft Visual Basic Enterprise Edition, 32-bit, for Windows, version 4.0 
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SUMMARY
=======

RDO does not have a FindFirst or a Seek method. This sample uses an RDO prepared
statement to provide this kind of functionality. The code included below allows
the user to type in search criteria in a text box, click a command button and
the list box will be filled with any records that satisfy the search criteria.
You may also want to use a stored procedure once you know that your query is
working the way that you want it to. Keep in mind that RDO is available in
Visual Basic 4.0 32-bit and Visual Basic 5.0 Enterprise editions only.

MORE INFORMATION
================

Step-By-Step Example
--------------------

1. Start a new project in Visual Basic. Form1 is created by default. Add a
  CommandButton, a text box and a list control. Accept the default names for
  all.

2. Make sure a reference to the Microsoft Remote Data Object library has been
  established. In Visual Basic 4.0, you can establish the reference by clicking
  References from the Tools menu. In Visual Basic 5.0, click References from
  the Project menu.

3. Add the following code to the General Declarations section of Form1:

      Option Explicit
      Dim ps As rdoPreparedStatement
      Dim conn As rdoConnection
      Dim rs As rdoResultset

      Private Sub Form_Load()
          With rdoEnvironments(0)
            .CursorDriver = rdUseOdbc
      Set conn = .OpenConnection("", rdDriverNoPrompt, False, _
      "driver={SQL Server};server=Myserv;uid=MyUID;pwd=Mypwd;database=pubs")
       End With
          Set ps = conn.CreatePreparedStatement("", " select au_lname " & _
            "from authors where au_lname like ?")
      End Sub

      Private Sub Command1_Click()
        list1.Clear
        ps.rdoParameters(0) = Text1.Text
        If rs Is Nothing Then
            Set rs = ps.OpenResultset(rdOpenKeyset)
        Else
            rs.Requery
        End If
        While Not rs.EOF
            list1.AddItem rs!au_lname
            rs.MoveNext
        Wend
        End Sub

      Private Sub Form_Unload(Cancel As Integer)
        rs.Close
        conn.Close
      End Sub

4. Make sure you have an appropriate ODBC data source, user ID, and password,
  then press the F5 key to run the program. Type your search criteria in Text1
  and click the CommandButton.

Additional query words: kbVBp400 kbVBp500 vkbVBp600 kbdse kbDSupport kbVBp kbRDO

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Keywords          : kbGrpDSVBDB 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB500Search kbVB600Search kbVB500 kbVB600 kbVB400Search kbVB400
Issue type        : kbhowto

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