UserPrincipal.GetGroups失敗，未知錯誤

Question

我試圖讓所有Active Directory組的用戶，用下面的代碼：

private static IEnumerable<string> GetGroupNames(string userName) 
    { 
     using (var context = new PrincipalContext(ContextType.Domain)) 
     { 
      using (var userPrincipal = UserPrincipal.FindByIdentity(context, userName)) 
      { 
       var groupSearch = userPrincipal.GetGroups(context); 
       var result = new List<string>(); 
       foreach (var principal in groupSearch) 
       { 
        Log.LogDebug("User {0} is member of group {0}", userPrincipal.DisplayName, principal.DisplayName); 
        result.Add(principal.SamAccountName); 
       } 
       return result; 
      } 
     } 
    } 

此代碼正確地找到用戶主體，但是當GetGroups被調用失敗一個PrincipalOperationException：未知的錯誤（0x80005000）。

根異常：

at System.DirectoryServices.AccountManagement.ADStoreCtx.GetGroupsMemberOf(Principal foreignPrincipal, StoreCtx foreignContext) 
    at System.DirectoryServices.AccountManagement.Principal.GetGroupsHelper(PrincipalContext contextToQuery) 
    at System.DirectoryServices.AccountManagement.Principal.GetGroups(PrincipalContext contextToQuery) 
    at [line of the GetGroup call] 

內部異常（收到COMException）：

at System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail) 
    at System.DirectoryServices.DirectoryEntry.Bind() 
    at System.DirectoryServices.DirectoryEntry.get_AdsObject() 
    at System.DirectoryServices.PropertyValueCollection.PopulateList() 
    at System.DirectoryServices.PropertyValueCollection..ctor(DirectoryEntry entry, String propertyName) 
    at System.DirectoryServices.PropertyCollection.get_Item(String propertyName) 
    at System.DirectoryServices.AccountManagement.ADUtils.RetriveWkDn(DirectoryEntry deBase, String defaultNamingContext, String serverN 

Another report with this problem。

任何線索？

Answer 1

添加Environment.UserDomainName作爲名稱參數PrincipalContext幫助：

using (var context = new PrincipalContext(ContextType.Domain, Environment.UserDomainName)) 

我仍然不知道爲什麼PrincipalContext（ContextType.Domain）只適用於尋找UserPrincipal而不是用戶的組。 COM錯誤消息「未知錯誤」不是很有幫助，只有ContextType的PrincipalContext構造函數重載實際上在MSDN上沒有記錄。正如Harvey Kwok所指出的那樣，它聽起來像是一個.NET框架的問題。