Пример метода ConvertToString (Visual Basic)ConvertToString Method Example (VB)

'BeginConvertToStringVB  
  
    'To integrate this code  
    'replace the data source and initial catalog values  
    'in the connection string  
  
Public Sub Main()  
    On Error GoTo ErrorHandler  
  
     ' to integrate this code replace the server name  
     ' in the CreateObject call  
  
     ' RDS variables  
    Dim rdsDS As RDS.DataSpace  
    Dim rdsDC As RDS.DataControl  
    Dim rdsDF As Object  
     ' recordset and connection variables  
    Dim rsAuthors As ADODB.Recordset  
    Dim strSQLAuthors As String  
    Dim strCnxn As String  
    Dim varString As Variant  
  
     ' Create a DataSpace object  
    Set rdsDS = New RDS.DataSpace  
     ' Create a DataFactory object  
    Set rdsDF = rdsDS.CreateObject("RDSServer.DataFactory", "https://MyServer") 'MyServer  
  
     ' Get all of the Author records  
  
    strCnxn = "Provider='sqloledb';Data Source='MySqlServer';" & _  
        "Initial Catalog='Pubs';Integrated Security='SSPI';"  
    strSQLAuthors = "SELECT * FROM Authors"  
    Set rsAuthors = rdsDF.Query(strCnxn, strSQLAuthors)  
     ' Show results  
    Debug.Print "Old RDS recordset count:" & rsAuthors.RecordCount  
  
     ' Convert the recordset into a MIME formatted string  
    varString = rdsDF.ConvertToString(rsAuthors)  
    Debug.Print "Recordset as MIME format string:"  
    Debug.Print varString  
  
     ' Convert string value back into an ADO Recordset  
    Set rdsDC = New RDS.DataControl  
    rdsDC.SQL = varString  
    rdsDC.ExecuteOptions = adcExecSync  
    rdsDC.FetchOptions = adcFetchUpFront  
    rdsDC.Refresh  
     ' Show results  
    Debug.Print "New ADO recordset count:" & rdsDC.Recordset.RecordCount  
  
     ' clean up  
    rsAuthors.Close  
    Set rsAuthors = Nothing  
    Set rdsDC = Nothing  
    Set rdsDS = Nothing  
    Set rdsDC = Nothing  
  
ErrorHandler:  
  
    If Not rsAuthors Is Nothing Then  
        If rsAuthors.State = adStateOpen Then rsAuthors.Close  
    End If  
    Set rsAuthors = Nothing  
    Set rdsDC = Nothing  
    Set rdsDS = Nothing  
    Set rdsDC = Nothing  
  
    If Err <> 0 Then  
        MsgBox Err.Source & "-->" & Err.Description, , "Error"  
    End If  
  
End Sub  
'EndConvertToStringVB  

См. такжеSee Also

Метод ConvertToString (RDS) ConvertToString Method (RDS)
Объект Recordset (ADO)Recordset Object (ADO)