OutputDataReceivedイベントを介したプロセス出力のキャプチャ

Question

「リアルタイム」（プロセスの実行中）でプロセス出力を取得しようとしています。私が使用するコードはかなりシンプルです（下記参照）。いくつかの奇妙な理由で、OutputDataReceivedイベントが呼び出されることはありません。どうして？

あなたが

mProcess.BeginOutputReadLine(); 

BeginOutputReadLineを呼び出す必要が

private void button2_Click(object sender, EventArgs e) 
    { 
     // Setup the process start info 
     var processStartInfo = new ProcessStartInfo("ping.exe", "-t -n 3 192.168.100.1") 
     { 
     UseShellExecute = false, 
     RedirectStandardOutput = true 
     }; 

     // Setup the process 
     mProcess = new Process { StartInfo = processStartInfo, EnableRaisingEvents = true }; 

     // Register event 
     mProcess.OutputDataReceived += OnOutputDataReceived; 

     // Start process 
     mProcess.Start(); 
     mProcess.WaitForExit(); 
    } 

    void OnOutputDataReceived(object sender, DataReceivedEventArgs e) 
    { 
     //Never gets called... 
    } 

Answer 1

は - "アプリケーションのリダイレクトStandardOutputストリーム上で、非同期読み取り操作を開始します。"また

Answer 2

void ExecuteCommand(string cmdpath, string cmdargs) 
{ 
    string command = cmdpath + " " + cmdargs; 

    tabc_results.SelectTab(1); 
    DoConsole("\r\nCmd>> " + command + "\r\n"); 

    var processInfo = new System.Diagnostics.ProcessStartInfo("cmd.exe", "/c " + command); 
    processInfo.CreateNoWindow = true; 
    processInfo.UseShellExecute = false; 
    processInfo.RedirectStandardError = true; 
    processInfo.RedirectStandardOutput = true; 

    var process = System.Diagnostics.Process.Start(processInfo); 

    process.OutputDataReceived += (
     object sender, System.Diagnostics.DataReceivedEventArgs e 
    ) => DoConsole("stdout>> " + e.Data + "\r\n"); 
    //Console.WriteLine("output>>" + e.Data); 
    process.BeginOutputReadLine(); 

    process.ErrorDataReceived += (
     object sender, System.Diagnostics.DataReceivedEventArgs e 
    ) =>DoConsole("stderr>> " + e.Data + "\r\n"); 
    //Console.WriteLine("error>>" + e.Data); 
    process.BeginErrorReadLine(); 

    process.WaitForExit(); 

    DoConsole("retcode>> " + process.ExitCode.ToString() + "\r\n"); 
    //Console.WriteLine("ExitCode: {0}", process.ExitCode); 
    process.Close(); 
}