How I can Check keyboard buffer?

nikulin_andrey

Hi! Please help me! I hava a problem. How I can check Keyboard buffer is empty or not? For instance do { // do something } while (CharFromKeyBoard != "q"); System.Read and SystemReadLine waiting user input, but I need do some operation until user press some key, for instance char "q". Sorry my English.

Heath Stewart

Try something like this (especially StreamReader.Peek()):

StreamReader reader = new StreamReader(Console.In);
try
{
reader = new StreamReader(Console.In); // Or whatever Stream.
do
{
// Do something.
} while (reader.Peek() != 113); // Might want to check 81, too.
}
finally
{
if (reader != null)
reader.Close();
}

Reminiscent of my younger years... 10 LOAD "SCISSORS" 20 RUN

nikulin_andrey

This sample doesn't work. The best overloaded method match for 'System.IO.StreamReader.StreamReader(System.IO.Stream)' has some invalid arguments Argument '1': cannot convert from 'System.IO.TextReader' to 'System.IO.Stream' :zzz:

Heath Stewart

That exception message is self-explanitory - you should be able to figure that one out. I just threw this sample together quick, but you have to learn to research problems yourself or you're really in trouble. If Console.In is a TextReader, then take a look at its methods or StreamReader's constructors. The former yields that TextReader.Peek does exist so you don't even have to create a new class instance. Just use Console.In.Peek to look at the next character in the buffer. Researching the docs is at least half of what development is.

Reminiscent of my younger years... 10 LOAD "SCISSORS" 20 RUN

scarecrow900

I know this is some years late but you might still be interested. do { } while(!Console.KeyAvailable) or do { } while(!Console.KeyAvailable && Console.ReadKey().KeyChar == 'q')

Thats the sound of Inevitability ....