从方法返回多个值的正确方法 [英] The right way of returning multiple values from a method

问题描述

我正在使用LINQ查询来获取userID和userRole，并将它们返回. 我想知道如何在返回数据后读取每个值. 这是代码.

I am fetching userID and userRole using LINQ query and I am returning them back. I want to know how can I read each value after returning data. Here's the code.

public object[] GetUserInfoFromUsernameAndPassword(string userName, string password)
{
  var userInfo = from u in STE.tblUsers
  where u.UserName == userName
  && u.PWD == password
  select new
  {
    u.UserID,
    u.UserRole
  };

  return userInfo.ToArray();
}

这是一个好方法吗? 如果有人知道更好的方法，请分享..

Is this a good way of doing it? If anyone know better way, please share..

谢谢

推荐答案

对于正在寻找一种无需创建新类的方法的人，请使用out或ref参数-

For those who are looking for a way to do this without creating a new class, use either out or ref parameters-

public void GetUserInfoFromUsernameAndPassword(string userName, string password, out int userID, out string userRole)
{
  var userInfo = from u in STE.tblUsers
  where u.UserName == userName
  && u.PWD == password
  select new
  {
    userID = u.UserID,
    userRole = u.UserRole
  };
}

从您的代码中调用它-

string username = "abc";
string password = "***";
string uid, role;

GetUserInfoFromUsernameAndPassword(username, password, out uid, out role);

Console.WriteLine(uid);
Console.WriteLine(role);

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