Примеры методов CopyRecord, CopyTo и SaveToFile (VB)

В этом примере показано, как создать копии файла с помощью объектов Stream или Record . Одна копия создается в веб-папку для публикации в Интернете. Другие свойства и методы: Stream Type, Open, LoadFromFile и Record Open.

'BeginCopyRecordVB  
  
'Note:  
' This sample requires that "C:\checkmrk.wmf" and  
' "https://MyServer/mywmf.wmf" exist.  
  
Option Explicit  
  
Private Sub Form_Load()  
    On Error GoTo ErrorHandler  
  
    ' Declare variables  
    Dim strPicturePath, strStreamPath, strStream2Path, _  
        strRecordPath, strStreamURL, strRecordURL As String  
    Dim objStream, objStream2 As Stream  
    Dim objRecord As Record  
    Dim objField As Field  
  
    ' Instantiate objects  
    Set objStream = New Stream  
    Set objStream2 = New Stream  
    Set objRecord = New Record  
  
    ' Initialize path and URL strings  
    strPicturePath = "C:\checkmrk.wmf"  
    strStreamPath = "C:\mywmf.wmf"  
    strStreamURL = "URL=https://MyServer/mywmf.wmf"  
    strStream2Path = "C:\checkmrk2.wmf"  
    strRecordPath = "C:\mywmf.wmf"  
    strRecordURL = "https://MyServer/mywmf2.wmf"  
  
    ' Load the file into the stream  
    objStream.Open  
    objStream.Type = adTypeBinary  
    objStream.LoadFromFile (strPicturePath)  
  
    ' Save the stream to a new path and filename  
    objStream.SaveToFile strStreamPath, adSaveCreateOverWrite  
  
    ' Copy the contents of the first stream to a second stream  
    objStream2.Open  
    objStream2.Type = adTypeBinary  
    objStream.CopyTo objStream2  
  
    ' Save the second stream to a different path  
    objStream2.SaveToFile strStream2Path, adSaveCreateOverWrite  
  
    ' Because strStreamPath is a Web Folder, open a Record on the URL  
    objRecord.Open "", strStreamURL  
  
    ' Display the Fields of the record  
    For Each objField In objRecord.Fields  
        Debug.Print objField.Name & ": " & objField.Value  
    Next  
  
    ' Copy the record to a new URL  
    objRecord.CopyRecord "", strRecordURL, , , adCopyOverWrite  
  
    ' Load each copy of the graphic into Image controls for viewing  
    Image1.Picture = LoadPicture(strPicturePath)  
    Image2.Picture = LoadPicture(strStreamPath)  
    Image3.Picture = LoadPicture(strStream2Path)  
    Image4.Picture = LoadPicture(strRecordPath)  
  
    ' clean up  
    objStream.Close  
    objStream2.Close  
    objRecord.Close  
    Set objStream = Nothing  
    Set objStream2 = Nothing  
    Set objRecord = Nothing  
    Exit Sub  
  
ErrorHandler:  
    ' clean up  
    If Not objStream Is Nothing Then  
        If objStream.State = adStateOpen Then objStream.Close  
    End If  
    Set objStream = Nothing  
  
    If Not objStream2 Is Nothing Then  
        If objStream2.State = adStateOpen Then objStream2.Close  
    End If  
    Set objStream2 = Nothing  
  
    If Not objRecord Is Nothing Then  
        If objRecord.State = adStateOpen Then objRecord.Close  
    End If  
    Set objRecord = Nothing  
  
    If Err <> 0 Then  
        MsgBox Err.Source & "-->" & Err.Description, , "Error"  
    End If  
End Sub  
'EndCopyRecordVB  

См. также:

Метод CopyRecord (ADO)
Метод CopyTo (ADO)
Метод LoadFromFile (ADO)
Метод Open (объект Record ADO)
Метод Open (объект Stream ADO)
Объект Record (ADO)
Метод SaveToFile
Объект Stream (ADO)
Свойство Type (объект Stream ADO)