RightControl.Common/Net/Net.cs

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using System.Collections.Generic;
using System.Net;
using System.Net.NetworkInformation;
using System.Net.Sockets;
using System.Text;
using System.Web;

namespace RightControl.Common
{
    /// <summary>
    /// 网络操作
    /// </summary>
    public class Net
    {
        #region Ip(获取Ip)
        /// <summary>
        /// 获取Ip
        /// </summary>
        public static string Ip
        {
            get
            {
                var result = string.Empty;
                if (HttpContext.Current != null)
                    result = GetWebClientIp();
                if (result.IsEmpty())
                    result = GetLanIp();
                return result;
            }
        }

        /// <summary>
        /// 获取Web客户端的Ip
        /// </summary>
        private static string GetWebClientIp()
        {
            var ip = GetWebRemoteIp();
            foreach (var hostAddress in Dns.GetHostAddresses(ip))
            {
                if (hostAddress.AddressFamily == AddressFamily.InterNetwork)
                    return hostAddress.ToString();
            }
            return string.Empty;
        }

        /// <summary>
        /// 获取Web远程Ip
        /// </summary>
        private static string GetWebRemoteIp()
        {
            return HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] ?? HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
        }

        /// <summary>
        /// 获取局域网IP
        /// </summary>
        private static string GetLanIp()
        {
            foreach (var hostAddress in Dns.GetHostAddresses(Dns.GetHostName()))
            {