#region 获得客户端IP
    private string GetClientIP()
    {
        string result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
        if (null == result || result == String.Empty)
        {
            result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
        }

        if (null == result || result == String.Empty)
        {
            result = HttpContext.Current.Request.UserHostAddress;
        }
        return result;
    }
    #endregion

------解决方案--------------------
你要获取客户端的内网IP?

------解决方案--------------------
C# code

                string ip; //获取登录者的IP
                if (Context.Request.ServerVariables["HTTP_VIA"] != null)
                {
                    ip = Context.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
                }
                else
                {
                    ip = Context.Request.ServerVariables["REMOTE_ADDR"].ToString();
                }

------解决方案--------------------
Context.Request.ServerVariables["REMOTE_ADDR"].ToString();


------解决方案--------------------

看看这个