Save InkCanvas strokes without using SaveFileDialog (UWP)

Question

In my UWP C# app I'm trying to save the strokes of an InkCanvas in a way that the user should be able to load the file and continue editing the strokes, is it possible to do this without asking the user to choose a location but rather by saving the file to a default location?

Thanks in advance

Answer 1

You should create a file in the AppData Local folder of your app and read it when necessary. I suggest using this code to create the file:

Windows.Storage.StorageFolder storageFolder = Windows.Storage.ApplicationData.Current.LocalFolder;
Windows.Storage.StorageFile file = await storageFolder.CreateFileAsync("sample.gif", Windows.Storage.CreationCollisionOption.ReplaceExisting);

And this one to write the strokes on it:

Windows.Storage.CachedFileManager.DeferUpdates(file);
IRandomAccessStream stream = await file.OpenAsync(Windows.Storage.FileAccessMode.ReadWrite);
using (IOutputStream outputStream = stream.GetOutputStreamAt(0)) {
   await inkCanvas.InkPresenter.StrokeContainer.SaveAsync(outputStream);
   await outputStream.FlushAsync();
}
stream.Dispose();

Windows.Storage.Provider.FileUpdateStatus status = await Windows.Storage.CachedFileManager.CompleteUpdatesAsync(file);

if (status == Windows.Storage.Provider.FileUpdateStatus.Complete) {
     // File saved
} else {
     // File NOT saved
}