转 C# Process运行cmd命令的异步回显

以下的代码为new Process() 调用cmd命令，并将结果异步回显到Form的例子：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;

namespace CmdCallbackShow
{
// 1.定义委托
public delegate void DelReadStdOutput(string result);
public delegate void DelReadErrOutput(string result);

public partial class Form1 : Form  
{  
    // 2.定义委托事件  
    public event DelReadStdOutput ReadStdOutput;  
    public event DelReadErrOutput ReadErrOutput;  

    public Form1()  
    {  
        InitializeComponent();  
        Init();  
    }  

    private void Init()  
    {  
        //3.将相应函数注册到委托事件中  
        ReadStdOutput += new DelReadStdOutput(ReadStdOutputAction);  
        ReadErrOutput += new DelReadErrOutput(ReadErrOutputAction);  
    }  

    private void button1_Click(object sender, EventArgs e)  
    {  
        // 启动进程执行相应命令,此例中以执行ping.exe为例  
        RealAction("ping.exe", textBox1.Text);  
    }  
      
    private void RealAction(string StartFileName, string StartFileArg)  
    {  
        Process CmdProcess = new Process();  
        CmdProcess.StartInfo.FileName = StartFileName;      // 命令  
        CmdProcess.StartInfo.Arguments = StartFileArg;      // 参数  

        CmdProcess.StartInfo.CreateNoWindow = true;         // 不创建新窗口  
        CmdProcess.StartInfo.UseShellExecute = false;  
        CmdProcess.StartInfo.RedirectStandardInput = true;  // 重定向输入  
        CmdProcess.StartInfo.RedirectStandardOutput = true; // 重定向标准输出  
        CmdProcess.StartInfo.RedirectStandardError = true;  // 重定向错误输出  
        //CmdProcess.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;  

        CmdProcess.OutputDataReceived += new DataReceivedEventHandler(p_OutputDataReceived);  
        CmdProcess.ErrorDataReceived += new DataReceivedEventHandler(p_ErrorDataReceived);  

        CmdProcess.EnableRaisingEvents = true;                      // 启用Exited事件  
        CmdProcess.Exited += new EventHandler(CmdProcess_Exited);   // 注册进程结束事件  

        CmdProcess.Start();  
        CmdProcess.BeginOutputReadLine();  
        CmdProcess.BeginErrorReadLine();  

        // 如果打开注释，则以同步方式执行命令，此例子中用Exited事件异步执行。  
        // CmdProcess.WaitForExit();       
    }  

    private void p_OutputDataReceived(object sender, DataReceivedEventArgs e)  
    {  
        if (e.Data != null)  
        {  
            // 4. 异步调用，需要invoke  
            this.Invoke(ReadStdOutput, new object[] { e.Data });  
        }  
    }  

    private void p_ErrorDataReceived(object sender, DataReceivedEventArgs e)  
    {  
        if (e.Data != null)  
        {  
            this.Invoke(ReadErrOutput, new object[] { e.Data });  
        }  
    }  

    private void ReadStdOutputAction(string result)  
    {  
        this.textBoxShowStdRet.AppendText(result + "\r\n");  
    }  

    private void ReadErrOutputAction(string result)  
    {  
        this.textBoxShowErrRet.AppendText(result + "\r\n");  
    }  

    private void CmdProcess_Exited(object sender, EventArgs e)  
    {  
        // 执行结束后触发  
    }  
}  

}