在WPF UWP WinUI中相同功能的用法的区别

文件选择器

WPF：OpenFileDialog

Microsoft.Win32.OpenFileDialog openFileDialog = new();
bool? result = openFileDialog.ShowDialog();
if (result.HasValue&&result.Value)
    FileName.Text = openFileDialog.FileName;
else 
    FileName.Text= null;

UWP：FileOpenPicker

FileOpenPicker picker = new FileOpenPicker();
picker.FileTypeFilter.Add("*");
StorageFile file = await picker.PickSingleFileAsync();
if (file!=null)
    FileName.Text=file.Name;
else 
    FileName.Text = "";

WinUI：FileOpenPicker

FileOpenPicker fileOpenPicker = new FileOpenPicker();
IntPtr hwnd = WinRT.Interop.WindowNative.GetWindowHandle(this);
WinRT.Interop.InitializeWithWindow.Initialize(fileOpenPicker, hwnd);
fileOpenPicker.FileTypeFilter.Add("*");
StorageFile file = await fileOpenPicker.PickSingleFileAsync();
if (file != null)
    FileName.Text = file.Name;
else
    FileName.Text = "";

WinUI：FileOpenPicker

winrt::Windows::Storage::Pickers::FileOpenPicker FPK;
auto initializeWithWindow{ FPK.as<IInitializeWithWindow>() };
initializeWithWindow->Initialize(MYHWND);
FPK.SuggestedStartLocation(winrt::Windows::Storage::Pickers::PickerLocationId::MusicLibrary);
FPK.FileTypeFilter().Append(L"*");
winrt::Windows::Storage::StorageFile file = co_await FPK.PickSingleFileAsync();

异步线程更新UI

WPF：InvokeAsync

  await Dispatcher.InvokeAsync(() => { MyTextBlock.Text = "123"; });

UWP：RunAsync

 await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => { MyTextBlock.Text = "123"; });

WinUI：TryEnqueue

 DispatcherQueue.TryEnqueue(Microsoft.UI.Dispatching.DispatcherQueuePriority.Normal, () => { MyTextBlock.Text = "123"; });