如何在.NET中生成進程并捕獲其STDOUT？我需要生成一個作為控制臺應用程序的子進程，并捕獲它的輸出。我為一個方法編寫了以下代碼：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 += new DataReceivedEventHandler(
delegate(object sender, DataReceivedEventArgs e)
{
using (StreamReader output = p.StandardOutput)
{
retMessage = output.ReadToEnd();
}
});p.WaitForExit();return retMessage;然而，這不會返回任何東西。我不相信OutputDataReceived事件正在被回調，或者WaitForExit()命令可能阻塞線程，因此它將永遠不會回調。有什么建議嗎？編輯：看來我對回調太費勁了。做：return p.StandardOutput.ReadToEnd();似乎運轉良好。
3 回答
侃侃爾雅
TA貢獻1801條經驗 獲得超16個贊
這是我驗證過的代碼。我使用它來生成MSBuild并監聽它的輸出：
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardOutput = true;
process.OutputDataReceived += (sender, args) => Console.WriteLine("received output: {0}", args.Data);
process.Start();
process.BeginOutputReadLine();
倚天杖
TA貢獻1828條經驗 獲得超3個贊
我需要捕獲stdout和stderr，如果進程沒有在預期的情況下退出，則需要超時。我想出了這個：
Process process = new Process();
StringBuilder outputStringBuilder = new StringBuilder();
try
{
process.StartInfo.FileName = exeFileName;
process.StartInfo.WorkingDirectory = args.ExeDirectory;
process.StartInfo.Arguments = args;
process.StartInfo.RedirectStandardError = true;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
process.StartInfo.CreateNoWindow = true;
process.StartInfo.UseShellExecute = false;
process.EnableRaisingEvents = false;
process.OutputDataReceived += (sender, eventArgs) => outputStringBuilder.AppendLine(eventArgs.Data);
process.ErrorDataReceived += (sender, eventArgs) => outputStringBuilder.AppendLine(eventArgs.Data);
process.Start();
process.BeginOutputReadLine();
process.BeginErrorReadLine();
var processExited = process.WaitForExit(PROCESS_TIMEOUT);
if (processExited == false) // we timed out...
{
process.Kill();
throw new Exception("ERROR: Process took too long to finish");
}
else if (process.ExitCode != 0)
{
var output = outputStringBuilder.ToString();
var prefixMessage = "";
throw new Exception("Process exited with non-zero exit code of: " + process.ExitCode + Environment.NewLine +
"Output from process: " + outputStringBuilder.ToString());
}
}
finally
{
process.Close();
}
我正在將stdout和stderr連接到相同的字符串中，但是如果需要的話，您可以將它分開。它使用事件，所以它應該處理它們的到來(我相信)。我已經成功地運行了這個程序，并將很快進行卷測試。
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