检查控制台应用程序 C# 中是否按下了任何键
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Checking if any key pressed in console application C#
提问by user1502952
I need to check if any key is pressed in a console application. The key can be any key in the keyboard. Something like:
我需要检查是否在控制台应用程序中按下了任何键。键可以是键盘中的任意键。就像是：
if(keypressed)
{
//Cleanup the resources used
}
I had come up with this:
我想出了这个：
ConsoleKeyInfo cki;
cki=Console.ReadKey();
if(cki.Equals(cki))
Console.WriteLine("key pressed");
It works well with all keys except modifier keys - how can I check these keys?
它适用于除修饰键之外的所有键 - 我如何检查这些键？
采纳答案by Ionic? Biz?u
This can help you:
这可以帮助您：
Console.WriteLine("Press any key to stop");
do {
while (! Console.KeyAvailable) {
// Do something
}
} while (Console.ReadKey(true).Key != ConsoleKey.Escape);
If you want to use it in an if, you can try this:
如果你想在一个中使用它if，你可以试试这个：
ConsoleKeyInfo cki;
while (true)
{
cki = Console.ReadKey();
if (cki.Key == ConsoleKey.Escape)
break;
}
For any key is very simple: remove the if.
对于任何键非常简单：删除if.
As @DawidFerenczymentioned we have to note that Console.ReadKey()is blocking. It stops the execution and waits until a key is pressed. Depending on the context, this may (not) be handy.
正如@DawidFerenczy提到的，我们必须注意这Console.ReadKey()是阻塞的。它停止执行并等待直到按下某个键。根据上下文，这可能（不）方便。
If you need to not block the execution, just test Console.KeyAvailable. It will contain trueif a key was pressed, otherwise false.
如果您不需要阻止执行，只需 test Console.KeyAvailable。它将包含true是否按下了一个键，否则false.
回答by John Mitchell
Have a look at the Console.KeyAvailibleif you want nonblocking.
Console.KeyAvailible如果您想要非阻塞，请查看。
do {
Console.WriteLine("\nPress a key to display; press the 'x' key to quit.");
// Your code could perform some useful task in the following loop. However,
// for the sake of this example we'll merely pause for a quarter second.
while (Console.KeyAvailable == false)
Thread.Sleep(250); // Loop until input is entered.
cki = Console.ReadKey(true);
Console.WriteLine("You pressed the '{0}' key.", cki.Key);
} while(cki.Key != ConsoleKey.X);
}
If you want blocking then use Console.ReadKey.
如果你想阻塞然后使用Console.ReadKey.
