Пример метода ConvertToString (Visual Basic)
'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. также:
Метод ConvertToString (служба удаленных рабочих столов)
Объект Recordset (ADO)