C＃的System.Diagnostics.Process重定向标准输出的大量数据

问题描述：

我跑从.NET应用程序的exe文件，并试图重定向标准输出到一个StreamReader。问题是，当我做

I running an exe from a .NET app and trying to redirect standard out to a streamreader. The problem is that when I do

myprocess.exe >> out.txt

out.txt接近14MB。当我这样做的命令行版本，它是非常快的，但是当我从我的CSHARP应用程序运行的过程中，它是速度奇慢因为我相信默认StreamReader的刷新每4096个字节。

out.txt is close to 14mb. When I do the command line version it is very fast but when I run the process from my csharp app it is excruciatingly slow because I believe the default streamreader flushes every 4096 bytes.

有没有办法更改默认流读取器的进程对象？

Is there a way to change the default stream reader for the Process object?

答

我还没有尝试过，但它看起来像异步方法可以提供更好的性能。相反 process.StandardOutput 的使用，试试这个方法来代替：

I haven't tried, but it looks like the asynchronous methods may offer better performance. Instead of using process.StandardOutput, try this method instead:

Process process = Process
    .Start(new ProcessStartInfo("a.exe"){RedirectStandardOutput = true});
if (process != null)
{
    process.OutputDataReceived += ((sender, e) =>
                                   {
                                       string consoleLine = e.Data;
                                       //handle data
                                   });
    process.BeginOutputReadLine();
}

C＃的System.Diagnostics.Process重定向标准输出的大量数据

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