Check GetStreamAsync status

问题

Grabbing an image via GetStreamAsync, how do I determine status?

HttpClient OpenClient = new HttpClient();
Stream firstImageStream = OpenClient.GetStreamAsync("imageUrl.jpg").Result;

Sometimes this will give an error (403 or 404 typically) and I simply want to skip processing those results.

All I can find says to use the StatusCode property or IsSuccessStatusCode, but those seem to only work on HttpResponseMessage, which is from GetAsync, which does not give me the Stream I need to process the image.

回答1:

The stream doesn't have the response status code. You'll need to get the HttpResponseMessage first, check the status code, and then read in the stream.

HttpClient OpenClient = new HttpClient();
var response = await OpenClient.GetAsync("imageUrl.jpg");
if (response.StatusCode == System.Net.HttpStatusCode.OK)
{
    Stream stream = await response.Content.ReadAsStreamAsync();
}

来源：https://stackoverflow.com/questions/38724299/check-getstreamasync-status