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博客园 - 残叶

Enum视为位域 ASP.NET 2.0 HttpHandler实现生成图片验证码(转) Asp.net 2.0生命周期 - 残叶 ASP.NET 2.0 的 App_Offline.htm - 残叶 联合使用抽象类和接口 - 残叶 C#中抽象类和接口的区别 C#静态构造函数 封装K2.net 2003中的K2ROM Asp.net开发小技巧 跨页面提交数据的方法 页面的重定向 - 残叶 (转)Asp.net 中 Get和Post 的用法 (转)关于ASP.net运行流程 O/R Mapping (Object-Relation Mapping,对象关系映射) - 残叶 C#发送Email方法总结 @@IDENTITY与SCOPE_IDENTITY() .NET和SQL Server中“空值”辨析 - 残叶 Transactions - 残叶 回家了 - 残叶
网络主机名与IP
残叶 · 2007-04-16 · via 博客园 - 残叶

一、通过网址获取IP

上一个GroupBox 的ID为:groupBox1;下一个为:groupBox2

TextBox的ID为: domainName;ListBox 的ID为:ip

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;namespace WindowsApplication12
{
    
public partial class Form1 : Form
    {
        
public Form1()
        {
            InitializeComponent();
        }
private void button1_Click(object sender, EventArgs e)
        {

            ip.Items.Clear();

try
            {
                
string ipAddress = domainName.Text.ToString();
                IPAddress[] hostinfo 
= Dns.GetHostAddresses(ipAddress);
                
for (int i = 0; i < hostinfo.Length; i++)
                {
                    ip.Items.Add(hostinfo[i]);
                }
            }
            
catch (Exception exc)
            {
                MessageBox.Show(exc.Message, 
"提示");
            }

        }

private void button2_Click(object sender, EventArgs e)
        {
            
this.Close();
        }

    }
}

二、通过IP获取域名

上一个GroupBox 的ID为:groupBox1;下一个为:groupBox2

TextBox的ID为: ip;ListBox 的ID为:domainName

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;namespace WindowsApplication12
{
    
public partial class Form1 : Form
    {
        
public Form1()
        {
            InitializeComponent();
        }
private void button1_Click(object sender, EventArgs e)
        {

            domainName.Items.Clear();

try
            {
                IPAddress ipAddress 
= IPAddress.Parse(ip.Text);
                IPHostEntry hostinfo 
= Dns.GetHostEntry(ipAddress);
                
string[] alias = hostinfo.Aliases;
                domainName.Items.Add(hostinfo.HostName);
                
for (int i = 0; i < alias.Length; i++)
                {
                    domainName.Items.Add(alias[i]);
                }
            }
            
catch (Exception exc)
            {
                MessageBox.Show(exc.Message, 
"提示");
            }

        }

private void button2_Click(object sender, EventArgs e)
        {
            
this.Close();
        }

    }
}