C＃asp.net Membership.Getuser（）总是为空

Question

我在激活页面中有以下代码，用户通过电子邮件链接激活帐户。我得到了“newUser.IsApproved = true;”这一行错误的“对象引用未设置为对象的实例”错误。 我检查userId字符串，它得到用户Id字符串和字符串不empty.Membership.Getuser（）总是得到空，任何人都可以帮助我？

//request for signed user UserId 
    Guid activationCode = new Guid(Request.QueryString["ActivationCode"]); 
    string userId = ""; 

    string ConnectionString = ConfigurationManager.AppSettings["myConnectionString"]; 
    try 
    { 
     using (SqlConnection sqlConnection = new SqlConnection(ConnectionString)) 
     { 
      SqlCommand sqlCommand = new SqlCommand("SELECT user_id FROM ActivationCode WHERE activation_code LIKE '%" + activationCode + "%'", sqlConnection); 
      sqlConnection.Open(); 
      SqlDataReader userIdRdr; 
      userIdRdr = sqlCommand.ExecuteReader(); 
      while (userIdRdr.Read()) 
      { 
       userId = userIdRdr["user_id"].ToString(); 
      } 
      sqlConnection.Close(); 

      MembershipUser newUser = Membership.GetUser(userId); 
      //activate signed user 
      newUser.IsApproved = true; 
      Membership.UpdateUser(newUser); 
     } 
    } 

Answer 1

明白了！

Guid guid = new Guid(userId); 
MembershipUser newUser = Membership.GetUser(guid); 
newUser.IsApproved = true; 
Membership.UpdateUser(newUser);