C#实现启动，关闭与查找进程的方法

using System;
using System.Diagnostics;
using System.Windows.Forms;
namespace ProcessDemo
{
  public partial class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
    }
    private void Form1_Load(object sender, EventArgs e)
    {
      this.linkLabel1.Links.Add(0, linkLabel1.Text.Length, "//www.jb51.net/");
    }
    private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
    {
      this.linkLabel1.Links[linkLabel1.Links.IndexOf(e.Link)].Visited = true;
      string target = e.Link.LinkData as string;
      if (target != null && target.StartsWith("http://"))
      {
        Process.Start(target);
      }
    }
    /// <summary>
    /// 列出所有可访问进程
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void btnList_Click(object sender, EventArgs e)
    {
      Process[] processes;
      processes = Process.GetProcesses();
      string str = "";
      foreach (Process p in processes)
      {
        try
        {
          str = p.ProcessName;
          this.lst1.Items.Add("名称：" + p.ProcessName + "，启动时间：" + p.StartTime.ToShortTimeString() + "，进程ID：" + p.Id.ToString() );
        }
        catch (Exception ex)
        {
          this.lst1.Items.Add(ex.Message.ToString());//某些系统进程禁止访问，所以要加异常处理
        }
      }
    }
    private void btnFind_Click(object sender, EventArgs e)
    {
      txtFind.Text = txtFind.Text.Trim().ToLower();
      if (txtFind.Text.Length > 0) 
      {
        Process[] arrP = Process.GetProcesses();
        foreach (Process p in arrP)
        {
          try
          {
            if (p.ProcessName.ToLower() == txtFind.Text)
            {
              MessageBox.Show(txtFind.Text + " 找到了，PID为 " + p.Id.ToString());
              return;
            }
          }
          catch { }
        }
        MessageBox.Show("未找到该进程，请检查输入!");
      }
    }
    private void btnKill_Click(object sender, EventArgs e)
    {
      txtFind.Text = txtFind.Text.Trim().ToLower();
      int pid = -1;
      if (txtFind.Text.Length > 0)
      {
        Process[] arrP = Process.GetProcesses();
        foreach (Process p in arrP)
        {
          try
          {
            if (p.ProcessName.ToLower() == txtFind.Text)
            {
              pid = p.Id;
              break;
            }
          }
          catch { }
        }
        if (pid != -1)
        {
          RunCmd("ntsd -c q -p " + pid);
        }
      }
    }
    /// <summary>
    /// 运行DOS命令
    /// DOS关闭进程命令(ntsd -c q -p PID )PID为进程的ID
    /// </summary>
    /// <param name="command"></param>
    /// <returns></returns>
    public string RunCmd(string command)
    {
      Process p = new Process();
      p.StartInfo.FileName = "cmd.exe";
      p.StartInfo.Arguments = "/c " + command;
      p.StartInfo.UseShellExecute = false;
      p.StartInfo.RedirectStandardInput = true;
      p.StartInfo.RedirectStandardOutput = true;
      p.StartInfo.RedirectStandardError = true;
      p.StartInfo.CreateNoWindow = true;
      p.Start();
      return p.StandardOutput.ReadToEnd();
    }
  }
}