创建基于命令的（即控制台）应用程序以从文本文件C＃ [英] Create a Command-based (i.e. console) application to read from Text file C#

问题描述

应用程序请求用户名和密码。应用程序匹配来自已保存的登录名称及其在名为login.txt的文本文件中提供的密码的登录名和密码。如果用户名和密码正确，那么应用程序{do something ....}

the application ask for user name and password. The application matches the login name and password from the already saved login names and their password given in a text file called "login.txt". If the user name and password are correct then the application { do something ....}

我不想使用包含，如果我在textfile中写这个格式，用户名：密码，如何替换，而不是包含???

I don't want to use contain, If I wrote in the textfile in this format, username:password, how can replace that instead of contain ???

using (StreamReader sr = File.OpenText("E:\\login.txt"))
               {
                   string[] lines = File.ReadAllLines("E:\\login.txt");

                   {

                       if (lines.Contains(Username) && lines.Contains(Password))
                       {
                          .......
                       }

推荐答案

使用 String.Split

using (StreamReader sr = File.OpenText("E:\\login.txt"))
   {
        string[] lines = File.ReadAllLines("E:\\login.txt");
        foreach (string line in lines)
        {
            string[] userPassword = line.Split(new string[] { ":" }, StringSplitOptions.None);
            if (userPassword[0] == Username && userPassword[1] == Password)
            {
                //.....
            }
        }
    }

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