本文实例讲述了C#获取真实IP地址实现方法,分享给大家供大家参考。具体实现方法如下:
通常来说,大家获取用户IP地址常用的方法是:
if((HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]!=null
&& HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] !=String.Empty) )
{
IpAddress=HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] ;
}
else
{
HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
}</div>
事实上,上面的代码只试用与用户只使用了1层代理,如果用户有2层,3层HTTP_X_FORWARDED_FOR 的值是:"本机真实IP,1层代理IP,2层代理IP,....." ,如果这个时候你的数据中保存IP字段的长度很小(15个字节),数据库就报错了。
实际应用中,因为使用多层透明代理的情况比较少,所以这种用户并不多。
获取用户真实IP的方法
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text.RegularExpressions;
namespace Common
{
/// <summary>
/// IPAddress 的摘要说明
/// </summary>
public class IPAddress : System.Web.UI.Page
{
public static Int64 toDenaryIp ( string ip )
{
Int64 _Int64 = 0;
string _ip = ip;
if ( _ip.LastIndexOf ( "." ) > -1 )
{
string[] _iparray = _ip.Split ( '.' );
_Int64 = Int64.Parse ( _iparray.GetValue ( 0 ).ToString() ) * 256 * 256 * 256 + Int64.Parse ( _iparray.GetValue ( 1 ).ToString() ) * 256 * 256 + Int64.Parse ( _iparray.GetValue ( 2 ).ToString() ) * 256 + Int64.Parse ( _iparray.GetValue ( 3 ).ToString() ) - 1;
}
return _Int64;
}
/// <summary>
/// /ip十进制
/// </summary>
public static Int64 DenaryIp
{
get {
Int64 _Int64 = 0;
string _ip = IP;
if ( _ip.LastIndexOf ( "." ) > -1 )
{
string[] _iparray= _ip.Split ( '.' );
_Int64 = Int64.Parse ( _iparray.GetValue ( 0 ).ToString() ) * 256 * 256 * 256 + Int64.Parse ( _iparray.GetValue ( 1 ).ToString() ) * 256 * 256 + Int64.Parse ( _iparray.GetValue ( 2 ).ToString() ) * 256 + Int64.Parse ( _iparray.GetValue ( 3 ).ToString() )-1;
}
return _Int64;
}
}
public static string IP
{
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." )
{
&nb