如何运行一个控制台应用程序，捕获输出，并在文字显示呢？ [英] How do I run a Console Application, capture the output and display it in a Literal?

问题描述

我看到，我可以的System.Diagnostics.Process启动进程。我用下面的代码很努力，但它不工作。该页面只是挂起，我必须重新启动IIS ...

 使用系统; 
使用System.Collections.Generic; 
使用的System.Web; 
使用System.Web.UI程序;使用System.Web.UI.WebControls 
;使用System.Diagnostics程序
; 
 
公共部分类VideoTest：System.Web.UI.Page 
 {
名单，LT;字符串> outputLines =新的List<串GT;（）; 
布尔退出= FALSE; 
 
保护无效的Page_Load（对象发件人，EventArgs五）
 {
串APPPATH = Request.PhysicalApplicationPath; 
 
流程myProcess =新工艺（）; 
 
 myProcess.StartInfo.UseShellExecute = FALSE; 
 myProcess.StartInfo.FileName = APPPATH +\\bin\\ffmpeg.exe 
 myProcess.StartInfo.CreateNoWindow = TRUE; 
 myProcess.OutputDataReceived + =新DataReceivedEventHandler（OutputHandler）; 
 myProcess.Exited + =新的EventHandler（ExitHandler）; 
 myProcess.Start（）; 
 
，而（！退出）
 {
 //这是不好不好不好不好.... 
} 
 
 litTest.Text =; 
的foreach（在outputLines串线）
 litTest.Text + =行; 
} 
 
私人无效OutputHandler（对象sendingProcess，DataReceivedEventArgs轮廓）
 {
 outputLines.Add（outLine.Data）; 
} 
 
 //处理Exited事件和显示处理信息。 
私人无效ExitHandler（对象发件人，发送System.EventArgs）
 {
退出= TRUE; 
} 
} 
  

解决方案

我已经做了非常相似的解决方案的东西 - 这是对我工作的罚款：

 的ProcessStartInfo PINFO =新的ProcessStartInfo（CMD 。可执行程序）; 
 pInfo.FileName = exePath; 
 pInfo.WorkingDirectory =新的FileInfo（exePath）.DirectoryName; 
 pInfo.Arguments = ARGS; 
 pInfo.CreateNoWindow = FALSE; 
 pInfo.UseShellExecute = FALSE; 
 pInfo.WindowStyle = ProcessWindowStyle.Normal; 
 pInfo.RedirectStandardOutput = TRUE; 
进程p =的Process.Start（PINFO）; 
 p.OutputDataReceived + = p_OutputDataReceived; 
 p.BeginOutputReadLine（）; 
 p.WaitForExit（）;根据返回代码
 //设置状态。 
如果（p.ExitCode == 0）this.Status = StatusEnum.CompletedSuccess; 
，否则this.Status = StatusEnum.CompletedFailure; 
  

有趣的差异似乎是使用WaitForExit（）的，也可能是BeginOutputReadLine（）。

I see that I can start processes with System.Diagnostics.Process. I'm trying with the following code, but its not working. The page just hangs and I have to restart IIS...

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Diagnostics;

public partial class VideoTest : System.Web.UI.Page
{
    List<string> outputLines = new List<string>();
    bool exited = false;

    protected void Page_Load(object sender, EventArgs e)
    {
        string AppPath = Request.PhysicalApplicationPath;

        Process myProcess = new Process();

        myProcess.StartInfo.UseShellExecute = false;
        myProcess.StartInfo.FileName = AppPath + "\\bin\\ffmpeg.exe";
        myProcess.StartInfo.CreateNoWindow = true;
        myProcess.OutputDataReceived += new DataReceivedEventHandler(OutputHandler);
        myProcess.Exited += new EventHandler(ExitHandler);
        myProcess.Start();

        while (!exited)
        {
            // This is bad bad bad bad....
        }

        litTest.Text = "";
        foreach (string line in outputLines)
            litTest.Text += line;
    }

    private void OutputHandler(object sendingProcess, DataReceivedEventArgs outLine)
    {
        outputLines.Add(outLine.Data);
    }

    // Handle Exited event and display process information.
    private void ExitHandler(object sender, System.EventArgs e)
    {
        exited = true;
    }
}

解决方案

I've done something very similar to your solution -- this is working fine for me:

ProcessStartInfo pInfo = new ProcessStartInfo("cmd.exe");
pInfo.FileName = exePath;
pInfo.WorkingDirectory = new FileInfo(exePath).DirectoryName;
pInfo.Arguments = args;
pInfo.CreateNoWindow = false;
pInfo.UseShellExecute = false;
pInfo.WindowStyle = ProcessWindowStyle.Normal;
pInfo.RedirectStandardOutput = true;
Process p = Process.Start(pInfo);
p.OutputDataReceived += p_OutputDataReceived;
p.BeginOutputReadLine();
p.WaitForExit();
// set status based on return code.
if (p.ExitCode == 0) this.Status = StatusEnum.CompletedSuccess;
   else this.Status = StatusEnum.CompletedFailure;

The interesting differences seem to be the use of WaitForExit(), and possibly the BeginOutputReadLine().

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