Web响应状态码 [英] Web Response status code
本文介绍了Web响应状态码的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
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;尽管有时我会收到404.如何仅在请求成功的情况下返回HTML字符串,而在返回404或任何其他错误状态代码时返回类似BadRequest
的内容呢?
I have this simple function to get HTML pages and return it as a string; though sometimes I get a 404. How can I only return the HTML string only if the request was successful, and return something like BadRequest
when it's a 404 or any other error status code?
public static string GetPageHTML(string link)
{
using (WebClient client= new WebClient())
{
return client.DownloadString(link);
}
}
推荐答案
您可以捕获WebException:
You could catch the 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,更合适的是在调用代码中捕获此异常,而不是尝试解析html,而不是将try/catch放在函数本身中.
Of course it would be more appropriate to catch this exception in the calling code and not even attempt to parse the html instead of putting the try/catch in the function itself.
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