C#在异常中获取HttpStatusCode用法

HttpStatusCode用法
原来我的写法是：

            catch (Exception ex)            {                msg = ex.ToString();                return false;            }

发现这么写没法获取到status code，所以参考该文章，取WebException e，即可。

catch (WebException e){       string status = null;       HttpWebResponse response = (HttpWebResponse)e.Response;       if (response.StatusCode == HttpStatusCode.NotFound)             status = "404";       if (response.StatusCode == HttpStatusCode.InternalServerError)             status = "500";       if (response.StatusCode == HttpStatusCode.BadGateway)             status = "502";}