Question

我创建了一个方法，该方法应该使用Membership返回登录用户的Active Directory属性。

我收到此错误The parameter 'username' must not be empty.任何想法如何解决？

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Configuration;
using System.Web.Security;
using System.DirectoryServices.AccountManagement;
using System.Threading;

   public static string SetGivenNameUser()
    {
        string givenName = string.Empty;
        MembershipUser user = Membership.GetUser();
        PrincipalContext ctx = new PrincipalContext(ContextType.Domain);
        UserPrincipal userP = UserPrincipal.FindByIdentity(ctx, user.UserName);
        if (userP != null)
            givenName = userP.GivenName;
        return givenName;
    }

STACK

ArgumentException: The parameter 'username' must not be empty.
Parameter name: username]
   System.Web.Util.SecUtility.CheckParameter(String& param, Boolean checkForNull, Boolean checkIfEmpty, Boolean checkForCommas, Int32 maxSize, String paramName) +2386569
   System.Web.Security.ActiveDirectoryMembershipProvider.CheckUserName(String& username, Int32 maxSize, String paramName) +30
   System.Web.Security.ActiveDirectoryMembershipProvider.GetUser(String username, Boolean userIsOnline) +86
   System.Web.Security.Membership.GetUser(String username, Boolean userIsOnline) +63
   System.Web.Security.Membership.GetUser() +19

Answer 1

除非您只是设置授权，在这种情况下需要重置httpcontext对象，获取用户名的最可靠方法是

HttpContext.Current.User.Identity.Name

所以，重构代码看起来像这样：

UserPrincipal userP = UserPrincipal.FindByIdentity(ctx, HttpContext.Current.User.Identity.Name);

原因是，某些对象有自己的本地“钩子”成为成员资格。有时这些钩子还没有填充我的httpcontext对象。

Answer 2

我分享解决了我的问题的代码。我的问题是当用户没有登录时我正在调用SetGivenNameUser，因此我必须进行调整。谢谢大家的建议。

   public static string SetGivenNameUser()
    {
        string givenName = string.Empty;
        string currentUser = HttpContext.Current.User.Identity.Name;
        // If the USer is logged in
        if (!string.IsNullOrWhiteSpace(currentUser))
        {
            MembershipUser user = Membership.GetUser();
            PrincipalContext ctx = new PrincipalContext(ContextType.Domain);
            UserPrincipal userP = UserPrincipal.FindByIdentity(ctx, user.UserName);
            if (userP != null)
                givenName = userP.GivenName;
        }
        return givenName;
    }

参数“username”不得为空

2 个答案: