CODEWITHSUNDEEP
iostreamwindows-runtimewindows-store-appswinrt-async
Jayant Varshney
Jayant Varshney

Reputation: 1825

Exception while showing a downloaded image in windows store apps

Hi I am downloading an image from the following code

            HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, imageUri);
            HttpResponseMessage response = await http.SendAsync(request, HttpCompletionOption.ResponseHeadersRead);
            var imageFile = await ApplicationData.Current.LocalFolder.CreateFileAsync(fileName, CreationCollisionOption.ReplaceExisting);
            var fs = await imageFile.OpenAsync(FileAccessMode.ReadWrite);
            DataWriter writer = new DataWriter(fs.GetOutputStreamAt(0));
            writer.WriteBytes(await response.Content.ReadAsByteArrayAsync());
            await writer.StoreAsync();
            writer.DetachStream();
            await fs.FlushAsync();
            fs.Dispose();

But when I try it to open immediately after running downloading code.. with the help of the following code and trying to set as a source to image control

            var imageFile = await ApplicationData.Current.LocalFolder.GetFileAsync(imageName);
            IRandomAccessStream stream = await imageFile.OpenAsync(FileAccessMode.Read);
            imageControl.SetSource(stream);

It throws the following exception

Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))

and Inner Exception is:

null

Please let me know that at which point I am doing mistake.

Thanks in Advance

Upvotes: 0

Views: 290

Answers (1)

Jayant Varshney
Jayant Varshney

Reputation: 1825

Got answer here.. just had to add one more line.. now the downloading code is

            HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, imageUri);
            HttpResponseMessage response = await http.SendAsync(request, HttpCompletionOption.ResponseHeadersRead);
            var imageFile = await ApplicationData.Current.LocalFolder.CreateFileAsync(fileName, CreationCollisionOption.ReplaceExisting);
            using (var fs = await imageFile.OpenAsync(FileAccessMode.ReadWrite))
            {
                var outStream = fs.GetOutputStreamAt(0);
                DataWriter writer = new DataWriter(outStream);
                writer.WriteBytes(await response.Content.ReadAsByteArrayAsync());
                await writer.StoreAsync();
                writer.DetachStream();
                await fs.FlushAsync();
                outStream.Dispose();
                fs.Dispose();
            }

Upvotes: 1

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