如何检查stdin的管道数据 [英] how to check stdin for piped data

问题描述

我希望能够将数据从stdin传输到我的prog或从文件中获取数据。

如果我尝试使用

Hi,
I would like to be able to either pipe data into my prog from stdin or get data from a file.
If I try to check by using

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推荐答案

如果是WinForm应用程序，我建议您对按键事件作出反应。

这样，只要按下任何键，你就可以继续你想要的任何东西。

它必须是一个控制台应用吗？

If it were a WinForm app I would suggest reacting to the keypress event.
That way as soon as any key is pressed you can move on to whatever you like.
Does it have to be a console app?

这是否work？

Console.OpenStandardInput（）。Length

Does this work?
Console.OpenStandardInput().Length

感谢您的回复。

>它必须是一个控制台应用程序吗？ - 对按键事件作出反应

是的，它只是一个过滤器应用程序。


我认为你可以在Console应用程序中获得按键事件但是

我不认为管道数据会导致按键事件和

程序不会接受任何Q& A用户输入。

程序将过滤浮点数流。

我希望用户成为能够提供流：

- 在命令行上输入

。 。例如：echo1.2334 2.345 3.456 | myprog

- 或者来自用户提供的文件arg [0]


如果两者都没有提供，编程将创建它自己的样本数据。


我无法从Console.OpenStandardInput（）。长度中获取任何内容

Thanks for your replies.
> Does it have to be a console app? - reacting to the keypress event
Yes it is just a filter app.

I think you CAN get keypress events in a Console app but
I don''t think piped data would cause a keypress event and
the program will not be taking any Q&A user input.
The program will filter a stream of floating point numbers.
I wanted the user to be able to supply the stream either:
- piped in on the command line
. . eg: echo "1.2334 2.345 3.456 " | myprog
- or from a file supplied by user as arg[0]

If neither is supplied the prog will create it''s own sample data.

I couldnt get anything out of "Console.OpenStandardInput().Length"

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