C# 获取并更改当前机器名

【实例截图】

【核心代码】

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

using System.Net;
using System.Runtime.InteropServices;
namespace Ex14_01
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
       
        [DllImport("kernel32.dll",EntryPoint="SetComputerNameEx")]
        public static extern int SetComputerNameEx(int type, String strname);
        private void Form1_Load(object sender, EventArgs e)
        {
            this.label3.Text = Dns.GetHostName();

       
        }
        private void button1_Click(object sender, EventArgs e)
        {
            if (this.textBox2.Text != "")
            {
                if (SetComputerNameEx(5, this.textBox2.Text) != 0)
                {
                    if (MessageBox.Show("  要使修改生效必需重新启动计算机  \r\n\t是否现在重启", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
                    {
                        try
                        {
                            System.Diagnostics.ProcessStartInfo psi = new System.Diagnostics.ProcessStartInfo();
                            psi.FileName = @"cmd.exe";
                            psi.Arguments = @"/c shutdown -r -t 0";
                            psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
                            System.Diagnostics.Process.Start(psi);
                        }
                        catch (Exception ey)
                        {
                            MessageBox.Show(ey.Message);
                        }

                    }
                }
                else
                {
                    MessageBox.Show("修改失败");
                }
            }
            else
            {
                MessageBox.Show("请输入要修改的机器名");
            }
        }
    }
}