// Cannot load photo set photos private void OnPhotoStreamException(object sender, GetPhotoSetPhotosExceptionEventArgs e) { Dispatcher.BeginInvoke(() => { if (e.PhotoSetId != PhotoSetSource.ResourceId) return; SystemTray.ProgressIndicator.IsVisible = false; if (PhotoSetSource.Photos.Count == 0) { StatusLabel.Text = AppResources.GenericPhotoLoadingErrorText; StatusLabel.Visibility = Visibility.Visible; PhotoStreamListView.Visibility = Visibility.Collapsed; } }); }
public async void GetPhotoSetPhotosAsync(string setId, Dictionary<string, string> parameters = null) { if (setPhotoFetchingQueue.Contains(setId)) return; setPhotoFetchingQueue.Add(setId); string timestamp = DateTimeUtils.GetTimestamp(); string nonce = Guid.NewGuid().ToString().Replace("-", null); Dictionary<string, string> paramDict = new Dictionary<string, string>(); paramDict["method"] = "flickr.photosets.getPhotos"; paramDict["format"] = "json"; paramDict["nojsoncallback"] = "1"; paramDict["oauth_consumer_key"] = consumerKey; paramDict["oauth_nonce"] = nonce; paramDict["oauth_signature_method"] = "HMAC-SHA1"; paramDict["oauth_timestamp"] = timestamp; paramDict["oauth_token"] = AccessToken; paramDict["oauth_version"] = "1.0"; paramDict["photoset_id"] = setId; if (parameters != null) { foreach (var entry in parameters) { paramDict[entry.Key] = entry.Value; } } paramDict["extras"] = UrlHelper.Encode(commonExtraParameters); string paramString = GenerateParamString(paramDict); string signature = GenerateSignature("GET", AccessTokenSecret, "https://api.flickr.com/services/rest", paramString); string requestUrl = "https://api.flickr.com/services/rest?" + paramString + "&oauth_signature=" + signature; HttpWebResponse response = await DispatchRequest("GET", requestUrl, null).ConfigureAwait(false); using (StreamReader reader = new StreamReader(response.GetResponseStream())) { if(setPhotoFetchingQueue.Contains(setId)) setPhotoFetchingQueue.Remove(setId); GetPhotoSetPhotosExceptionEventArgs exceptionEvt = null; if (response.StatusCode != HttpStatusCode.OK) { HandleHTTPException(response); exceptionEvt = new GetPhotoSetPhotosExceptionEventArgs(); exceptionEvt.PhotoSetId = setId; PhotoSetPhotosException(this, exceptionEvt); return; } string jsonString = await reader.ReadToEndAsync().ConfigureAwait(false); if (!TryHandleResponseException(jsonString, () => { GetPhotoSetPhotosAsync(setId, parameters); })) { exceptionEvt = new GetPhotoSetPhotosExceptionEventArgs(); exceptionEvt.PhotoSetId = setId; PhotoSetPhotosException(this, exceptionEvt); return; } GetPhotoSetPhotosEventArgs args = new GetPhotoSetPhotosEventArgs(); args.PhotoSetId = setId; args.Response = jsonString; PhotoSetPhotosReturned.DispatchEvent(this, args); } }