UserPrincipal.IsMemberOf is returning false

Question

我试图验证用户是否在"TestGroup"组中。用户是"TestGroup"组的一部分，即使我得到retval = false @line(retval = user. ismemberof (groupPrincipal);)，并且在事件查看器中显示msg为"用户名或密码不正确"。

你能帮我一下吗?

string userName = this.Request.ServerVariables["AUTH_USER"];
if (ValidateUser(userName) == false)
      Response.Redirect("Error.aspx?errormsg=" + userName + " does not have permission to view this page");
 public static bool ValidateUser(String userName)
        {
            bool useGroupAuthorization = true;
            if (useGroupAuthorization)
                return GroupLookup(userName, "TestGroup");            
} 
private static bool GroupLookup(string userName, string groupName)
        {
            System.Diagnostics.EventLog appLog = new System.Diagnostics.EventLog();
            appLog.Source = "Test App";
            bool retVal = false;
            PrincipalContext pc = null;
            UserPrincipal user = null;
            GroupPrincipal groupPrincipal = null;
            try
            {
                string strdomain = "TestDomain"; 
                pc = new PrincipalContext(ContextType.Domain,strdomain);
                user = UserPrincipal.FindByIdentity(pc, userName);
                groupPrincipal = GroupPrincipal.FindByIdentity(pc, groupName);     
                retVal = user.IsMemberOf(groupPrincipal);
            }
            catch (NoMatchingPrincipalException nmpx)
            {              
                appLog.WriteEntry(nmpx.Message);
            }
            catch (PrincipalOperationException pox)
            {
               appLog.WriteEntry(pox.Message);
            }
            catch (Exception ex)
            {
                if (user == null)
                {
                    appLog.WriteEntry(ex.Message);
                }
                else
                {
                    appLog.WriteEntry(ex.Message);
                }
            }
            return retVal;
        }


    // when i tried with below code i am getting userPrincipal is null
     //    bool retVal = false; string strdomain = "TestDomain";
        //    PrincipalContext principalCtx = new PrincipalContext(ContextType.Domain, strdomain);
        //      UserPrincipal queryByExampleUser = new UserPrincipal ( principalCtx );
        //      queryByExampleUser.SamAccountName = userName;
        //      PrincipalSearcher principalSearcher = new PrincipalSearcher ( );
        //      principalSearcher.QueryFilter = queryByExampleUser;
        //      UserPrincipal userPrincipal = principalSearcher.FindOne ( ) as UserPrincipal;
        //      retVal =  IsUserInGroup("TestGroup", userPrincipal);
        //      return retVal;
        // }
        //static bool IsUserInGroup(string groupName, UserPrincipal user)
        //{
        //    PrincipalContext principalContext = new PrincipalContext(ContextType.Domain);
        //    GroupPrincipal groupPrincipal = GroupPrincipal.FindByIdentity(principalContext, groupName);
        //    if (user.IsMemberOf(groupPrincipal))
        //    {
        //        return true;
        //    }
        //    return false;
        //}

Answer 1

"gpKnownAccountToCheck. "

使用方法:GetMembers(recursive: true)

 var result = groupPrincipal
                    .GetMembers(true)
                    .Where(x => x.Sid == userPrincipal.Sid)
                    .Count() > 0;

Answer 2

UserPrincipal.IsMemberOf(GroupPrincipal)似乎适用于某些组而不适用于其他组。在我的域上，它与域开发人员(自定义组)一起工作，而不是域域用户。图。我在调试器中停止了代码并检查了Domain Users组的成员列表，并在其中找到了我的用户，但是IsMemberOf仍然返回false。然而，我发现如果我在GroupPrincipal中循环遍历UserPrincipal对象集合。我可以通过将集合中的UserPrincipal与我正在搜索的UserPrincipal进行比较来进行检查。很糟糕，但这是我能找到的唯一可靠的解决方案。

示例代码:

string sAccountToCheckSID = upAccountToCheck.Sid.Value;
foreach(UserPrincipal up in gpKnownAccountToCheck.Members)
{
     string sKnownSIDInGroup = up.Sid.Value;
     if(sKnownSIDInGroup.Equals(sAccountToCheckSID))
     {
          userMatchingUserObject = userKnownUser;
          return true;
     }
}

所以我不知道为什么。但这是我的工作。