void TryImageAssignment(UIImage image)
{
if (cancellationTokenSource.IsCancellationRequested)
{
return;
}
lock (padlock)
isDownloadFinished = true;
if (downloadFailed)
{
image = UIImage.FromFile("error.png");
trace.IncrementMetric("failed", 1);
}
else
{
trace.IncrementMetric("completed", 1);
}
InvokeOnMainThread(() => {
ImgPicture.Image = image;
ActIndicator.StopAnimating();
BtnDownloadRetry.Title = downloadFailed ? "Retry" : "Download";
BtnDownloadRetry.Enabled = true;
});
}
void ReleaseDesignerOutlets()
{
if (ActIndicator != null)
{
ActIndicator.Dispose();
ActIndicator = null;
}
if (BtnDownloadRetry != null)
{
BtnDownloadRetry.Dispose();
BtnDownloadRetry = null;
}
if (ImgPicture != null)
{
ImgPicture.Dispose();
ImgPicture = null;
}
if (SgmDownloadTool != null)
{
SgmDownloadTool.Dispose();
SgmDownloadTool = null;
}
}
void BtnDownloadRetry_Clicked(object sender, EventArgs e)
{
BtnDownloadRetry.Enabled = false;
ActIndicator.StartAnimating();
isDownloadFinished = false;
cancellationTokenSource = new CancellationTokenSource();
cancellationToken = cancellationTokenSource.Token;
if (downloadFailed)
{
downloadFailed = false;
trace.IncrementMetric("retry", 1);
}
if (SgmDownloadTool.SelectedSegment == 0)
{
DownloadImageUsingNSUrlSession();
}
else
{
DownloadImageUsingHttpClient();
}
}
