How to Efficiently Capture Console Application Output in .NET?

<.> Capture the process output in the .NET

Start a console application process and capture its output in .NET. You can use the following methods:

This method uses the Event processing program to add the received output to the string. We call

string retMessage = string.Empty;
ProcessStartInfo startInfo = new ProcessStartInfo();
Process p = new Process();

startInfo.CreateNoWindow = true;
startInfo.RedirectStandardOutput = true;
startInfo.RedirectStandardInput = true;

startInfo.UseShellExecute = false;
startInfo.Arguments = command;
startInfo.FileName = exec;

p.StartInfo = startInfo;
p.Start();

p.OutputDataReceived += (sender, args) => retMessage += args.Data;

// 开始异步输出读取。
p.BeginOutputReadLine();

p.WaitForExit();

return retMessage;

to start the output asynchronous reading. By default, will block until the child process exits, which allows the output to be completely captured.

OutputDataReceived Another method of reading the output is: BeginOutputReadLine() WaitForExit()

This simpler method is enough in many cases, but it should be noted that it reads all output at one time. If the output is large, it may block the execution thread. Using event processing procedures can provide asynchronous output capture.

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