在我的UWP C#应用程序中,我试图以用户应该能够加载文件并继续编辑笔划的方式保存InkCanvas的笔划,是否可以在不要求用户选择的情况下执行此操作一个位置,而是通过将文件保存到默认位置?
提前致谢
答案 0 :(得分:0)
您应该在应用的AppData Local文件夹中创建一个文件,并在必要时阅读。我建议使用此代码创建文件:
Windows.Storage.StorageFolder storageFolder = Windows.Storage.ApplicationData.Current.LocalFolder;
Windows.Storage.StorageFile file = await storageFolder.CreateFileAsync("sample.gif", Windows.Storage.CreationCollisionOption.ReplaceExisting);
这一个用它写笔画:
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
}