HttpWebResponse returns 404 error

问题

How to let Httpwebresponse ignore the 404 error and continue with it? It's easier than looking for exceptions in input as it is very rare when this happens.

回答1:

I'm assuming you have a line somewhere in your code like:

HttpWebResponse response = request.GetResponse() as HttpWebResponse;

Simply replace it with this:

HttpWebResponse response;

try
{
    response = request.GetResponse() as HttpWebResponse;
}
catch (WebException ex)
{
    response = ex.Response as HttpWebResponse;
}

回答2:

    try
    {
        HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://mysite.com");
        HttpWebResponse response = (HttpWebResponse)request.GetResponse();          
    }
    catch(WebException ex)
    {
        HttpWebResponse webResponse = (HttpWebResponse)ex.Response;          
        if (webResponse.StatusCode == HttpStatusCode.NotFound)
        {
            //Handle 404 Error...
        }
    }

回答3:

If you look at the properties of the WebException that gets thrown, you'll see the property Response. Is this what you are looking for?

来源：https://stackoverflow.com/questions/1857512/httpwebresponse-returns-404-error