InternetHelper

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本文介绍了一个C#实现的网络工具箱，包含检查网络连接状态、获取工作组及计算机信息等功能。提供了实用的方法如发送局域网消息、获取主机名等。

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Text.RegularExpressions; using System.Runtime.InteropServices; using System.DirectoryServices; using System.Diagnostics; using System.Net; using System.Web; namespace Ella.ToolKit { /// <summary> /// IP操作 /// <para/>Author : AnDequan /// <para/>Date : 2010-12-23 /// </summary> public sealed class InternetHelper : Singleton<InternetHelper> { [DllImport("wininet.dll", EntryPoint = "InternetGetConnectedState")] public extern static bool InternetGetConnectedState(out int conState, int reder); /// <summary> /// 是否已经连接上网络 /// <para/>Author : AnDequan /// <para/>Date : 2010-12-23 /// </summary> /// <returns>true - 是，false - 否</returns> public bool IsConnectedToInternet() { int iDesc = 0; return InternetGetConnectedState(out iDesc, 0); } /// <summary> /// 获取网络中所有工作组 /// <para/>Author : AnDequan /// <para/>Date : 2010-12-23 /// </summary> /// <returns></returns> public List<string> GetGroup() { List<string> group = new List<string>(); try { DirectoryEntry MainGroup = new DirectoryEntry("WinNT:"); foreach (DirectoryEntry domain in MainGroup.Children) { group.Add(domain.Name); } } catch (Exception ex) { LogHelper.Instance.Add(ex); } return group; } /// <summary> /// 获取工作组内所有计算机 /// <para/>Author : AnDequan /// <para/>Date : 2010-12-23 /// </summary> /// <param name="group">工作组名称</param> /// <returns></returns> public List<string> GetComputerOfGroup(string group) { List<string> lstComputer = new List<string>(); try { DirectoryEntry MainGroup = new DirectoryEntry("WinNT:"); foreach (DirectoryEntry domain in MainGroup.Children) { if (domain.Name == group) { foreach (DirectoryEntry pc in domain.Children) { if (pc.Name != "Schema")//Schema是结束标记 { lstComputer.Add(pc.Name); } } } } } catch (Exception ex) { LogHelper.Instance.Add(ex); } return lstComputer; } /// <summary> /// 局域网内发消息 /// <para/>Author : AnDequan /// <para/>Date : 2010-12-23 /// </summary> /// <param name="acceptIP">接受者IP</param> /// <param name="info">消息</param> public void SendInfo(string acceptIP, string info) { ProcessStartInfo psi = new ProcessStartInfo(); psi.FileName = @"cmd.exe"; psi.Arguments = @"/c net send" + acceptIP + " " + info + ""; psi.WindowStyle = ProcessWindowStyle.Hidden; Process.Start(psi); } /// <summary> /// 通过IP取得主机名称 /// <para/>Author : AnDequan /// <para/>Date : 2010-12-23 /// </summary> /// <param name="IP"></param> /// <returns></returns> public string HostOfIP(string IP) { IPHostEntry hostInfo = null; ; try { if (ValidateHelper.Instance.IsRightIP(IP)) hostInfo = Dns.Resolve(IP); } catch (Exception ex) { LogHelper.Instance.Add(ex); } return null == hostInfo ? string.Empty : hostInfo.HostName; } /// <summary> /// 取得客户端真实IP。如果有代理则取第一个非内网地址 /// </summary> public string IPAddress { get { string result = String.Empty; result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]; if (result != null && result != String.Empty) { //可能有代理 if (result.IndexOf(".") == -1) //没有“.”肯定是非IPv4格式 result = null; else { if (result.IndexOf(",") != -1) { //有“,”，估计多个代理。取第一个不是内网的IP。 result = result.Replace(" ", "").Replace("'", ""); string[] temparyip = result.Split(",;".ToCharArray()); for (int i = 0; i < temparyip.Length; i++) { if (IsIPAddress(temparyip[i]) && temparyip[i].Substring(0, 3) != "10." && temparyip[i].Substring(0, 7) != "192.168" && temparyip[i].Substring(0, 7) != "172.16.") { return temparyip[i]; //找到不是内网的地址 } } } else if (IsIPAddress(result)) //代理即是IP格式 return result; else result = null; //代理中的内容非IP，取IP } } string IpAddress = (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null && HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != String.Empty) ? HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] : HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"]; if (null == result || result == String.Empty) result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"]; if (result == null || result == String.Empty) result = HttpContext.Current.Request.UserHostAddress; return result; } } /// <summary> /// 判断是否是IP地址格式 0.0.0.0 /// </summary> /// <param name="str1">待判断的IP地址</param> /// <returns>true or false</returns> private bool IsIPAddress(string value) { if (value == null || value == string.Empty || value.Length < 7 || value.Length > 15) return false; string regformat = @"^d{1,3}[.]d{1,3}[.]d{1,3}[.]d{1,3}___FCKpd___0quot;"; Regex regex = new Regex(regformat, RegexOptions.IgnoreCase); return regex.IsMatch(value); } #region User - Defined Private Function #endregion } }