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：

[csharp] view plain copy

    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

            }

        }

    }