获得绝对的服务器地址(原创)

 

 public string GetUrl()
    {
        try
        {
            url = "http://" + HttpContext.Current.Request.Url.Authority + HttpContext.Current.Request.ApplicationPath + "/";
        }
        catch
        {
            url = "http://" + HttpContext.Current.Request.Url.Authority+ "/"; 
       }
        return url;
    }