Web响应状态代码

Question

我有这个简单的函数来获取HTML页面并将其作为字符串返回; 虽然有时我得到404.如果请求成功,我怎么才能返回HTML字符串,并返回类似BadRequest404或任何其他错误状态代码的东西？

public static string GetPageHTML(string link)
{
    using (WebClient client= new WebClient())
    {
        return client.DownloadString(link);
    }
}

Answer 1

您可以捕获WebException:

public static string GetPageHTML(string link)
{
    try
    {
        using (WebClient client = new WebClient())
        {
            return client.DownloadString(link);
        }
    }
    catch (WebException ex)
    {
        var statusCode = ((HttpWebResponse)ex.Response).StatusCode;
        return "An error occurred, status code: " + statusCode;
    }
}

当然,在调用代码中捕获此异常更为合适,甚至不会尝试解析html而不是将try/catch放在函数本身中.