VB6 ADODB.Recordset RecordCount property always returns -1

Question

I am trying to get some old VB6 code to work with SQL Server Compact.

I can connect, open the database and all seems well. I can run insert select commands which

Answer 1

You may try something like this..

Set rs = mCmd.Execute

rs.MoveFirst

Do Until rs.EOF = true

    Debug.Print rs.RecordCount  ' Always returns -1  !!
    Debug.Print rs.Fields(0)   ' returns correct data for first row, first col
    Debug.Print rs.Fields(1)   ' returns correct data for first row, 2nd col
    Debug.Print rs.Fields(2)   ' returns correct data for first row, 3rd col

   counter = counter + 1
   rs.MoveNext

Loop

Answer 2

Actually the CursorLocation plays a major role in this case. Use rs.CursorLocation = adUseClient to set the cursor location and try.

    Set rs = New ADODB.Recordset
    rs.CursorLocation = adUseClient
    Dim DbConnectionString As String

    DbConnectionString = mSqlProvider & _
                            mSqlHost


    Set mDbConnection = New ADODB.Connection
    mDbConnection.CursorLocation = adUseServer

    Call mDbConnection.Open(DbConnectionString)

    If mDbConnection.State = adStateOpen Then
        Debug.Print (" Database is open")
        ' Initialise the command object
        Set mCmd = New ADODB.Command
        mCmd.ActiveConnection = mDbConnection

        mCmd.CommandText = "select * from myTestTable"
        mCmd.CommandType = adCmdText

        Set rs = mCmd.Execute

        Debug.Print rs.RecordCount  ' This should now return the right value.
        Debug.Print rs.Fields(0)   ' returns correct data for first row, first col
        Debug.Print rs.Fields(1)   ' returns correct data for first row, 2nd col
        Debug.Print rs.Fields(2)   ' returns correct data for first row, 3rd col

    End If

End Sub

Answer 3

That's a result of the type of cursor used to access the data, this post covers the issue and possible fixes.

http://www.devx.com/tips/Tip/14143

EDIT

I apologize for not being more attentive to the fact that you were dealing with Compact. With Compact the situation is similar to the one I referenced, as it uses forward only cursors by default (which do not support row count) but there are two other cursor types available as documented in the link below.

http://support.microsoft.com/kb/272067

Answer 4

Here is a solution for you that I used

Dim recordnumber As Long
Dim SalRSrec As New ADODB.Recordset
Set SalRSrec = Nothing
SalRSrec.Open ("SELECT count(*) from SALARY where EMPID= '" & cmb_empid & "' ;"), Dbase, adOpenKeyset, adLockOptimistic
recordnumber = SalRSrec.GetString
MsgBox recordnumber

Answer 5

Below code might help you,

set conn = CreateObject("ADODB.Connection") 
conn.open "<connection string>" 
set rs = CreateObject("ADODB.Recordset") 
sql = "SELECT columns FROM table WHERE [...]" 
rs.open sql,conn,1,1 
if not rs.eof then 
    nr = rs.recordcount 
    response.write "There were " & nr & " matches." 
    ' ... process real results here ... 
else 
    response.write "No matches." 
end if 
rs.close: set rs = nothing 
conn.close: set conn = nothing 

Answer 6

Replace Set rs = mCmd.Execute with:

set rs = new ADODB.Recordset
rs.Open "select * from myTestTable", mDBConnection, adOpenDynamic, adLockOptimistic

The adOpenDynamic will allow a forward/backward read through to get your recordcount.