获取在 C# 中输入控制台输入所花费的时间

Question

我有一个方法可以使用Console.ReadLine()从控制台获取输入

我想知道用户写输入花了多长时间。

我知道我可以用StopWatch记录时间，但我只想记录第一次按下的键和回车键之间的时间。

我能做什么？

用谷歌翻译器翻译

Answer 1

版本 1

Stopwatch stopWatch = new Stopwatch();

// Read first key pressed, then start stopwatch
var firstChar = Console.ReadKey();
stopWatch.Start();

// Read the rest followed by enter, then stop stopwatch
var restOfString = Console.ReadLine();
stopWatch.Stop();

// Join first char and rest of string together
var wholeString = string.Concat(firstChar.KeyChar, restOfString);
TimeSpan ts = stopWatch.Elapsed;

Console.WriteLine($"String entered: {wholeString}.");
Console.WriteLine($"It took {ts.Seconds} seconds.");
Console.ReadLine();

第 2 版

var keyInfo = new ConsoleKeyInfo();
var userInput = new StringBuilder();
var stopWatch = new Stopwatch();
var started = false;

do
{
     keyInfo = Console.ReadKey(false);

     if (started == false)
     {
          stopWatch.Start();
          started = true;
     }                

     switch (keyInfo.Key)
     {
          case ConsoleKey.Backspace:
              Console.Write(" \b");
              if(userInput.Length > 0) userInput.Remove(userInput.Length - 1, 1);
              break;
          // Stopping delete key outputting a space
          case ConsoleKey.Delete:
              Console.Write("\b");
              break;
          case ConsoleKey.Enter:
              break;
          default:
              userInput.Append(keyInfo.KeyChar);
              break;
    }
}
while (keyInfo.Key != ConsoleKey.Enter);

stopWatch.Stop();
TimeSpan ts = stopWatch.Elapsed;

var finalString = userInput.ToString();

Console.WriteLine();

Console.WriteLine($"String entered: {finalString}.");
Console.WriteLine($"It took {ts.Seconds} seconds.");

Console.ReadLine();

您可能需要整理处理其他特殊字符，因为这只是解决您的特定问题。另请注意，您可以使用ReadKey(true) 来拦截输入并停止任何输出。然后您可以使用Console.Write() 控制您自己的输出。

第 3 版

这里给你的选项是一个拦截和控制输出的版本。这将是我的偏好。

var keyInfo = new ConsoleKeyInfo();
var userInput = new StringBuilder();
var stopWatch = new Stopwatch();
var started = false;

do
{
    keyInfo = Console.ReadKey(true);

    if (started == false)
    {
        stopWatch.Start();
        started = true;
    }

    if (keyInfo.Key == ConsoleKey.Backspace)
    {
        Console.Write("\b \b");
        if(userInput.Length > 0) userInput.Remove(userInput.Length - 1, 1);
    }
    else if (keyInfo.Key == ConsoleKey.Enter)
    {
        // Do nothing
    }
    else if(Char.IsLetter(keyInfo.KeyChar) ||
            Char.IsDigit(keyInfo.KeyChar) ||
            Char.IsWhiteSpace(keyInfo.KeyChar) ||
            Char.IsPunctuation(keyInfo.KeyChar))

    {
        Console.Write(keyInfo.KeyChar);
        userInput.Append(keyInfo.KeyChar);
    }
} while (keyInfo.Key != ConsoleKey.Enter);

stopWatch.Stop();
TimeSpan ts = stopWatch.Elapsed;

var finalString = userInput.ToString();

Console.WriteLine();

Console.WriteLine($"String entered: {finalString}.");
Console.WriteLine($"It took {ts.Seconds} seconds.");

Console.ReadLine();

Answer 2

这样的事情怎么样：

while (!Console.KeyAvailable)
    Thread.Sleep(250);

var start = DateTime.Now;
var input = Console.ReadString();
var stop = DateTime.Now;