C# 获取系统打开的端口和状态

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Diagnostics;using System.IO;namespace Ex14_07{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { Process p = new Process(); p.StartInfo.FileName = "cmd.exe"; p.StartInfo.UseShellExecute = false; p.StartInfo.RedirectStandardInput = true; p.StartInfo.RedirectStandardOutput = true; p.StartInfo.RedirectStandardError = true; p.StartInfo.CreateNoWindow = true; p.Start(); p.StandardInput.WriteLine(@"netstat -a -n > c:\port.txt"); } private void button1_Click(object sender, EventArgs e) { this.richTextBox1.Text = ""; try { string path = @"c:\port.txt"; using (StreamReader sr = new StreamReader(path)) { while (sr.Peek() >= 0) { this.richTextBox1.Text = sr.ReadLine() "\r\n"; } } } catch (Exception hy) { MessageBox.Show(hy.Message); } } }}