asp.net中获取客户端IP

private string GetClientIP()

{

string result = Request.ServerVariables["HTTP_X_FORWARDED_FOR"]; //http_forwarded_for

if (null == result || result == String.Empty)

{

result = Request.ServerVariables["REMOTE_ADDR"];//remote_addr

}

if (null == result || result == String.Empty)

{

result = Request.UserHostAddress;

}

return result;

}