Question

我需要创建一个带有用户名和“密码”的程序。如果他们匹配该程序将说你在，如果没有，你就出去了。我是为一个用户写的，但我不知道如何在一个程序中创建多个用户。我的代码如下。谢谢你的帮助：）

Console.WriteLine("Enter your Name");
Console.WriteLine("Enter your Pswrd");
string name = Console.ReadLine();
string pswrd = Console.ReadLine();
string myname = "John";
string mypswrd = "123456";

if (name == myname &  pswrd == mypswrd)
{
    Console.WriteLine("You are logged in");
}
else
{
    Console.WriteLine("Incorrect name or pswrd");
}

Console.ReadLine();

Answer 1

//building the user "database" each pair is <user,password>
Dictionary<string, string> users = new Dictionary<string, string>();
users.Add("John", "123456");
//Here you should add more users in the same way...
//But i would advise reading them from out side the code (SQL database for example).

Console.Writeline("Enter your Name");
string name = Console.ReadLine();
Console.WriteLine("Enter your Passward");
string password = Console.ReadLine();

if (users.ContainsKey(name) && users[name] == password)
{
    Console.WriteLine("You are logged in");
}
else
{
    Console.WriteLine("Incorrect name or password");
}

Console.ReadLine();

Answer 2

这应该有效（不包含检查输入的值是否正确，你应该自己添加这种安全性:)）：

        Dictionary<string, string> namesToCheck = new Dictionary<string, string>
        {
            {"John", "123456"},
            {"Harry", "someotherpassword"}
        };

        Console.WriteLine("Enter your Name");
        string name = Console.ReadLine();
        Console.WriteLine("Enter your Pswrd");
        string pswrd = Console.ReadLine();

        if (namesToCheck.ContainsKey(name) && namesToCheck[name] == pswrd)
        {
            Console.WriteLine("You are logged in");
        }
        else
        {
            Console.WriteLine("Incorrect name or pswrd");
        }

        Console.ReadLine();

Answer 3

为什么不使用数组？

Console.WriteLine("Enter your Name");
Console.WriteLine("Enter your Pswrd");
string name = Console.ReadLine();
string pswrd = Console.ReadLine();

string[] names = "James,John,Jude".Split(Convert.ToChar(","));
string[] passes = "Pass1, Word2, Password3".Split(Convert.ToChar(","));

for (int i = 0; i<names.Length, i++)
{
    if (names[i] == name && passes[i] == pswrd)
    {
        Console.WriteLine("You are logged in");
    }
    else
    {
        Console.WriteLine("Incorrect name or pswrd");
    }
}

这将使用以下名称/ pswrd组合： James / Pass1，John / Word2，Jude / Password3

对于更大的列表，我建议您使用外部文本文件并在每个文件中读取行。

字符串 - 创建“密码”和“用户”（简单的字符串）

3 个答案: