protected virtual void OnFileChanged()
{
controlNumber++;
fileNameLabel.Text = DriveFile.Name;
fileSizeLabel.Text = Common.NumberOfBytesToString(DriveFile.Size);
lblID.Text = DriveFile.StorageFileId;
label3.Visible = false;
widthAndHeightLabel.Visible = false;
if (!DriveFile.IsImage)
{
lock (pictureCancellationTokenSourceLoker)
{
pictureCancellationTokenSource?.Cancel();
pictureCancellationTokenSource = new CancellationTokenSource();
}
ImageLoaded?.Invoke(this, new EventArgs());
pictureBox1.BackgroundImage = Resources.no_image;
Picture = null;
return;
}
// Image preview async loading
ImageLoading?.Invoke(this, new EventArgs());
Task.Run(async delegate
{
try
{
lock (pictureCancellationTokenSourceLoker)
{
if (pictureCancellationTokenSource != null)
{
pictureCancellationTokenSource.Cancel();
}
pictureCancellationTokenSource = new CancellationTokenSource();
}
pictureBox1.BackgroundImage = Resources.loading;
Picture = null;
int cn = controlNumber;
Image image;
try
{
image = await DriveFile.Drive.GetImageAsync(DriveFile, pictureCancellationTokenSource.Token);
if (cn != controlNumber)
{
return;
}
Invoke(new MethodInvoker(() =>
{
label3.Visible = true;
widthAndHeightLabel.Visible = true;
widthAndHeightLabel.Text = string.Format("{0} x {1}", DriveFile.ImageWidth, DriveFile.ImageHeight);
pictureBox1.BackgroundImage = image;
Picture = image;
Invoke(new MethodInvoker(() =>
{
ImageLoaded?.Invoke(this, new EventArgs());
}));
if (widthAndHeightLabel.Text == "0 x 0")
{
widthAndHeightLabel.Text = string.Format("{0} x {1}", image.Width, image.Height);
}
}));
}
catch (System.IO.FileNotFoundException) { }
catch (OperationCanceledException) { }
catch (BadImageFormatException)
{
pictureBox1.BackgroundImage = Resources.no_image;
Invoke(new MethodInvoker(() =>
{
ImageLoaded?.Invoke(this, new EventArgs());
}));
}
}
catch (Exception ex)
{
OnError(ex);
}
});
}