Active Directory異常asp .net

Question

public bool IsUserGroupMember(string user, string unit) 
{ 
    bool member = false; 

    try 
    { 
     PrincipalContext ctx = new PrincipalContext(ContextType.Domain); 
     string[] groups = unit.Split(','); 
     foreach (string word in groups) 
     { 
      GroupPrincipal grp = GroupPrincipal.FindByIdentity(ctx, IdentityType.Name, word); 

      if (grp != null) 
      { 
       foreach (Principal p in grp.GetMembers(true)) 
       { 
        if (p.SamAccountName == user) 
        { 
         member = true; 
         grp.Dispose(); 
         ctx.Dispose(); 
         return member; 
        } 
       } 
      } 
      else 
      { 
       grp.Dispose(); 
       ctx.Dispose(); 
       return member; 
      } 
     } 
    } 
    catch (COMException) 
    { 
     return member; 
    } 

    return member; 
} 

我正在使用上面的方法，以遞歸方式查找用戶是否是Active Directory中組的成員。它運作良好。儘管有時我會遇到一個奇怪的例外。

不支持指定的方法。 foreach（grp.GetMembers（true）中的Principal p）是紅色的（抱歉，我無法上傳該例外的圖片）。最奇怪的是，它似乎是隨機拋出，如果我刷新頁面效果很好..

我試着在網上找，但現在沒有好消息就解決..

Answer 1

我終於結束瞭解決方案！

我剛加入我的域名，如下：

PrincipalContext ctx = new PrincipalContext(ContextType.Domain, "MyDomain"); 

它解決了這個問題的時候了！

關於緩慢..我使用餅乾，繼此link。

Answer 2

你應該以相反的方式做到這一點：獲得用戶，然後是該用戶所屬的授權組 - 此調用（.GetAuthorizationGroups在UserPrincipal）已經是爲您遞歸搜索組！

public bool IsUserGroupMember(string user, string unit) 
{ 
    bool isMember = false; 

    try 
    { 
     // put the PrincipalContext in a using(..) block - then it's 
     // automatically, safely and properly disposed of at the end 
     using (PrincipalContext ctx = new PrincipalContext(ContextType.Domain)) 
     { 
      // get the user 
      UserPrincipal up = UserPrincipal.FindByIdentity(ctx, user); 

      if(up != null) 
      { 
       // get the authorization groups for the user 
       // this call is *RECURSIVELY* enumerating all groups 
       // that this user is a member of 
       var authGroups = up.GetAuthorizationGroups(); 

       // now that you have the groups - just determine if the user 
       // is a member of the group you're looking for...... 
      } 
     } 
    } 
    catch (COMException comEx) 
    { 
     isMember = false; 
    } 

    return isMember; 
}