Lettura dell'objectGUID di un oggetto e Creazione di una rappresentazione di stringa del GUID

La proprietà objectGUID di ogni oggetto in Dominio di Active Directory Services viene archiviata nella directory come stringa ottetto. Una stringa ottetto è una matrice di caratteri a un byte. Utilizzare il metodo IADs::get_GUID per recuperare il formato stringa associabile dell'objectGUID di un oggetto directory.

Negli esempi di codice seguenti viene mostrata una funzione che legge l'attributo objectGUID e restituisce una rappresentazione di stringa del GUID usato per l'associazione all'oggetto.

• Esempio di Visual Basic
• Esempio di C++

Esempio di Visual Basic

Dim sADsPathObject As String
Dim sObjectGUID As String
Dim sBindByGuidStr As String
 
Dim IADsObject As IADs
Dim IADsObject2 As IADs
On Error Resume Next
 
' Query the user for an ADsPath to start.
sADsPathObject = InputBox("This code binds to a directory object by ADsPath, retrieves the GUID, then rebinds by GUID." & vbCrLf & vbCrLf & "Specify the ADsPath of the object to bind to :")
 
If sADsPathObject = "" Then
    GoTo CleanUp
End If
 
MsgBox "Binding to " & sADsPathObject
 
' Bind to initial object.
Set IADsObject = GetObject(sADsPathObject)
 
If (Err.Number <> 0) Then
   MsgBox Err.Number & " on GetObject method"
   GoTo CleanUp
End If
 
' Save the GUID of the object.
sObjectGUID = IADsObject.Guid
 
MsgBox "The GUID for " & vbCrLf & vbCrLf & sADsPathObject & vbCrLf & vbCrLf & " is " & vbCrLf & vbCrLf & sObjectGUID
 
' Release the initial object.
Set IADsObject = Nothing
 
' Build a string for Binding to the object by GUID.
sBindByGuidStr = "LDAP://<GUID=" & sObjectGUID & ">"

MsgBox sBindByGuidStr
 
' Bind BACK to the Same object using the GUID.
Set IADsObject = GetObject(sBindByGuidStr)
 
If (Err.Number <> 0) Then
   MsgBox Err.Number & " on GetObject method "
   GoTo CleanUp
End If
 
MsgBox "Successfully RE bound to " & sADsPathObject & vbCrLf & vbCrLf & " using the path:" & vbCrLf & vbCrLf & sBindByGuidStr
 
' Release bind by GUID Object.
CleanUp:
   Set IADsObject = Nothing

Esempio di C++

#define UNICODE
#include <ole2.h>
#include <stdio.h>
#include <activeds.h>

#define PATH_SIZE 1024

void wmain(int argc, wchar_t *argv[])
{
    // Initialize COM.
    CoInitialize(0);
     
    WCHAR wszADsPathObject[PATH_SIZE + 1];
    HRESULT hr;
    IADs *pIADsObject = NULL;
    IADs *pIADsObjectByGuid = NULL;
     
    // If no ADsPath was specified on the command line, query the user for a ADsPath to start.
    if(!argv[1])
    {
        _putws(L"This code binds to a directory object by ADsPath, retrieves the GUID,\n"
            L" then rebinds by GUID. \n\nEnter the ADsPath of the object to bind to :\n");
        fgetws(wszADsPathObject, PATH_SIZE, stdin);
    }
    else
    {
        wcsncpy_s(wszADsPathObject, argv[1], PATH_SIZE - 1);
        wszADsPathObject[PATH_SIZE] = 0;
    }
     
    if (!wszADsPathObject[0])
    {
        return;
    }
     
    wprintf(L"\nBinding to %s\n", wszADsPathObject);
     
    // Bind to initial object.
    hr = ADsGetObject(wszADsPathObject, IID_IADs, (void**)&pIADsObject);
    if (SUCCEEDED(hr))
    {
        BSTR bstrGuid = NULL;
        hr = pIADsObject->get_GUID(&bstrGuid); 
        
        if (SUCCEEDED(hr))
        {
            LPWSTR wszFormat = L"LDAP://<GUID=%s>";
            LPWSTR pwszBindByGuidStr; 

            wprintf(L"\n The GUID for\n\n%s\n\nis\n\n%s\n", wszADsPathObject, bstrGuid);
     
            // Build a string for Binding to the object by GUID.
            pwszBindByGuidStr = new WCHAR[wcslen(wszFormat) + wcslen(bstrGuid) + 1];
            if(pwszBindByGuidStr)
            {
                swprintf_s(pwszBindByGuidStr, wszFormat, bstrGuid);
         
                // Bind BACK to the Same object using the GUID.
                hr = ADsGetObject(pwszBindByGuidStr, IID_IADs, (void**)&pIADsObjectByGuid);
                 
                if (SUCCEEDED(hr))
                {
                    wprintf(L"\nSuccessfully re-bound to\n\n%s\n\nUsing the path:\n\n%s\n", 
                        wszADsPathObject, pwszBindByGuidStr);
         
                    // Release bind by GUID Object.
                    pIADsObjectByGuid->Release();
                    pIADsObjectByGuid = NULL;
                }

                delete pwszBindByGuidStr;
            }
            else
            {
                hr = E_OUTOFMEMORY;
            }
     
            SysFreeString(bstrGuid);
        }
     
        pIADsObject->Release();
        pIADsObject = NULL;
    }
     
    if (FAILED(hr))
    {
        wprintf(L"Failed");
    }
}