列舉服務的複本

本主題包含程式碼範例,列舉整個企業中不同主機電腦上複寫服務的已安裝實例。 若要變更複寫服務每個實例的服務帳戶密碼,請使用此程式碼範例與 變更服務使用者帳戶上的密碼 主題中的程式碼範例搭配使用。

程式碼範例假設每個服務實例都有自己的服務連接點, (SCP) 物件位於 目錄中。 SCP 是 serviceConnectionPoint 類別的物件。 這個類別具有 關鍵字 屬性,這是複寫到樹系中每個通用類別目錄 (GC) 的多值屬性。 每個實例 SCP 的 關鍵字 屬性都包含服務的產品 GUID。 這可藉由搜尋 GC 來尋找等於產品 GUID 之 關鍵字 屬性的物件,以尋找各種服務實例的所有 SCP。

程式碼範例會取得 GC 的 IDirectorySearch 指標,並使用 IDirectorySearch::ExecuteSearch 方法來搜尋 SCP。 請注意,GC 包含每個 SCP 的部分複本。 也就是說,它包含一些 SCP 屬性,但不包含所有屬性。 在此程式碼範例中,將焦點放在 serviceDNSName 屬性上,其中包含該服務實例之主機伺服器的 DNS 名稱。 由於 serviceDNSName 不是在 GC 中複寫的其中一個屬性,因此程式碼範例會使用雙步驟程式來擷取它。 首先,它會使用 GC 搜尋來取得 SCP (DN) 的辨別名稱,然後使用該 DN 直接系結至 SCP 來擷取 serviceDNSName 屬性。

HRESULT EnumerateServiceInstances(
       LPWSTR szQuery,                // Search string filter.
       LPWSTR *pszAttribs,            // An array of attributes 
                                      // to retrieve.
       DWORD dwAttribs,               // # of attributes requested.
       DWORD *pdwAttribs,             // # of attributes retrieved.
       ADS_ATTR_INFO **ppPropEntries  // Returns a pointer to the 
                                      // retrieved attributes.
        )
{
HRESULT hr;
IEnumVARIANT *pEnum = NULL;
IADsContainer *pCont = NULL;
VARIANT var;
IDispatch *pDisp = NULL;
BSTR  bstrPath = NULL;
ULONG lFetch;
IADs *pADs = NULL;
int iRows=0;
static IDirectorySearch *pSearch = NULL;
static ADS_SEARCH_HANDLE hSearch = NULL;

// Parameters for IDirectoryObject.
IDirectoryObject *pSCP = NULL;
 
// Structures and parameters for IDirectorySearch.
DWORD               dwPref;
ADS_SEARCH_COLUMN   Col;
ADS_SEARCHPREF_INFO SearchPref[2];
 
// First time through; set up the search.
if (pSearch == NULL) 
{
    // Bind to the GC: namespace container object. The GC DN 
    // is a single immediate child of the GC: namespace, which must 
    // be obtained through enumeration.
    hr = ADsGetObject(L"GC:", 
        IID_IADsContainer, 
        (void**) &pCont );
    if (FAILED(hr)) {
        _tprintf(TEXT("ADsGetObject(GC) failed: 0x%x\n"), hr);
        goto Cleanup;
    }
 
    // Obtain an enumeration interface for the GC container. 
    hr = ADsBuildEnumerator(pCont,&pEnum);
    if (FAILED(hr)) {
        _tprintf(TEXT("ADsBuildEnumerator failed: 0x%x\n"), hr);
        goto Cleanup;
    }
 
    // Enumerate. There is only one child of the GC: object.
    hr = ADsEnumerateNext(pEnum,1,&var,&lFetch);
    if (( hr == S_OK ) && ( lFetch == 1 ) ) 
    {
        pDisp = V_DISPATCH(&var);
        hr = pDisp->QueryInterface( IID_IADs, (void**)&pADs);
        if (hr == S_OK) 
            hr = pADs->get_ADsPath(&bstrPath);
    }
    if (FAILED(hr)) {
        _tprintf(TEXT("Enumeration failed: 0x%x\n"), hr);
        goto Cleanup;
    }
 
    // Now bstrPath contains the ADsPath for the current GC.  
    // Bind the GC to get the search interface.
    hr = ADsGetObject(bstrPath, 
                      IID_IDirectorySearch, 
                      (void**)&pSearch);
    if (FAILED(hr)) {
        _tprintf(TEXT("Failed to bind search root: 0x%x\n"), hr);
        goto Cleanup;
    } 
 
    // Set up a deep search.
    // Thousands of objects are not expected
    // in this example; request 1000 rows per page.
    dwPref=sizeof(SearchPref)/sizeof(ADS_SEARCHPREF_INFO);
    SearchPref[0].dwSearchPref =    ADS_SEARCHPREF_SEARCH_SCOPE;
    SearchPref[0].vValue.dwType =   ADSTYPE_INTEGER;
    SearchPref[0].vValue.Integer =  ADS_SCOPE_SUBTREE;
 
    SearchPref[1].dwSearchPref =    ADS_SEARCHPREF_PAGESIZE;
    SearchPref[1].vValue.dwType =   ADSTYPE_INTEGER;
    SearchPref[1].vValue.Integer =  1000;
 
    hr = pSearch->SetSearchPreference(SearchPref, dwPref);
    if (FAILED(hr))    {
        _tprintf(TEXT("Failed to set search prefs: 0x%x\n"), hr);
        goto Cleanup;
    } 
 
    // Execute the search. From the GC, get the distinguished name 
    // of the SCP. Use the DN to bind to the SCP and get the other 
    // properties.
    hr = pSearch->ExecuteSearch(szQuery, pszAttribs, 1, &hSearch);
    if (FAILED(hr)) {
        _tprintf(TEXT("ExecuteSearch failed: 0x%x\n"), hr);
        goto Cleanup;
    } 
}
 
// Get the next row.
hr = pSearch->GetNextRow(hSearch);
 
// Process the row.
if (SUCCEEDED(hr) && hr !=S_ADS_NOMORE_ROWS) 
{
    // Get the distinguished name of the object in this row.
    hr = pSearch->GetColumn(hSearch, L"distinguishedName", &Col);
    if FAILED(hr) { 
        _tprintf(TEXT("GetColumn failed: 0x%x\n"), hr);
        goto Cleanup;
    }
    // Bind to the DN to get the properties.
    if (Col.dwADsType == ADSTYPE_CASE_IGNORE_STRING)
    {
        LPWSTR szSCPPath = 
          new WCHAR[7 + lstrlenW(Col.pADsValues->CaseIgnoreString) + 1];
        wcscpy_s(szSCPPath, L"LDAP://");
        wcscat_s(szSCPPath, Col.pADsValues->CaseIgnoreString);
        hr = ADsGetObject(szSCPPath, 
                          IID_IDirectoryObject,
                          (void**)&pSCP);
        delete szSCPPath;
        if (SUCCEEDED(hr)) 
        {
            hr = pSCP->GetObjectAttributes(pszAttribs, dwAttribs,
                          ppPropEntries, pdwAttribs);
            if(FAILED(hr)) {
                _tprintf(TEXT("GetObjectAttributes Failed."), hr);
                goto Cleanup;
            }
        }
    }
    pSearch->FreeColumn(&Col);}
 
Cleanup:
if (bstrPath)
    SysFreeString(bstrPath);
if (pSCP) 
    pSCP->Release();
if (pCont) 
    pCont->Release();
if (pEnum)
    ADsFreeEnumerator(pEnum);
if (pADs) 
    pADs->Release();
if (pDisp)
    pDisp->Release();
 
return hr;
 
}