c# 获取客户端ip

在做wcf时，需要得到客户端的ip。一开始用了几种方法总是不好使。后来在网上找到这个方法可以正确的获得客户端的ip了。

[OperationContract]

public static string GetClientIp()

{

string result = String.Empty;

result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

if (result != null && result != String.Empty)

{

//可¨¦能¨¹有®D代䨲理¤¨ª

if (result.IndexOf(".") == -1) //没?有®D“¡ã.”¡À肯?定¡§是º?非¤?IPv4格?式º?

result = null;

else

{

if (result.IndexOf(",") != -1)

{

//有®D“¡ã,”¡À，ê?估¨¤计?多¨¤个?代䨲理¤¨ª。¡ê取¨?第̨²一°?个?不?是º?内¨²网ª?的Ì?IP。¡ê

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];

}

}

}

else if (IsIPAddress(result))

return result;

else

result = null;

}

}

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;

}