windows开发打开文件夹

看代码。

FolderPicker folder = new FolderPicker();
folder.SuggestedStartLocation = PickerLocationId.Desktop;
folder.FileTypeFilter.Add("*");

StorageFolder selectedFolder = await folder.PickSingleFolderAsync();

报错：

System.Runtime.InteropServices.COMException
  HResult=0x80070578
  Message=Invalid window handle. (0x80070578)
Consider WindowNative, InitializeWithWindow
See https://aka.ms/cswinrt/interop#windows-sdk
  Source=HelloWorld
  StackTrace:
   at HelloWorld.MainWindow.<SelectFolderButton_Click>d__2.MoveNext() in E:\VisualStudioProjects\HelloWorld\HelloWorld\HelloWorld\MainWindow.xaml.cs:line 55

解决办法，初始化windows，具体原因不知道为啥，还需慢慢来了解：

var window = new Microsoft.UI.Xaml.Window();
var hwnd = WinRT.Interop.WindowNative.GetWindowHandle(window);
FolderPicker folder = new FolderPicker();
folder.SuggestedStartLocation = PickerLocationId.Desktop;
folder.FileTypeFilter.Add("*");
WinRT.Interop.InitializeWithWindow.Initialize(folder, hwnd);

StorageFolder selectedFolder = await folder.PickSingleFolderAsync();

微软官方提供的解决方案：
https://github.com/microsoft/CsWinRT/blob/master/docs/interop.md#windows-sdk

好了，记录到这里，持续更新中。

记录问题也是一种修行。

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