Question

我最近升级到了Xamarin.Mac Unified API。在升级之前，我通过FolderBrowserDialog使用System.Windows.Forms。通过升级，我无法再访问System.Windows.Forms命名空间。我联系了客户支持，他们建议引用本机API。所以我添加了这个nuget及其依赖项。该nuget的存在消除了以下代码的intellisense错误：

   var dir = Environment.SpecialFolder.MyPictures.ToString ();

   var dlg = new CommonOpenFileDialog ();
   dlg.Title = "Exclude Subdirectories";
   dlg.IsFolderPicker = true;
   dlg.InitialDirectory = dir;
   dlg.AddToMostRecentlyUsedList = false;
   dlg.AllowNonFileSystemItems = false;
   dlg.DefaultDirectory = dir;
   dlg.EnsureFileExists = true;
   dlg.EnsurePathExists = true;
   dlg.EnsureReadOnly = false;
   dlg.EnsureValidNames = true;
   dlg.Multiselect = false;
   dlg.ShowPlacesList = true;

   if (dlg.ShowDialog () == CommonFileDialogResult.Ok) {
      var folder = dlg.FileName;
   }

但是在运行时它引用了{strong} ole32.dll 的System.DllNotFoundException。有关如何克服这个问题的任何想法？这link并不能让人充满希望。在这一点上我唯一的选择是恢复到经典的api ......如果我这样做，我不相信它可以放在应用程序商店中。

Answer 1

根本不需要那个nuget。您可以使用以下代码完成FolderBrowserDialog：

NSOpenPanel openDlg = NSOpenPanel.OpenPanel;
openDlg.Prompt = "Select Directory"; //Defaults to OPEN
openDlg.CanChooseDirectories = true;
openDlg.CanChooseFiles = false;
openDlg.Title = "Choose Monitored Directory";
openDlg.AllowsMultipleSelection = false;
openDlg.CanCreateDirectories = true;
openDlg.ReleasedWhenClosed = true;

openDlg.DirectoryUrl = new NSUrl (Environment.GetFolderPath (System.Environment.SpecialFolder.UserProfile));
openDlg.Begin (result => {
    var url = openDlg.Url;

    if (result == 1) {
        //directory selected
    } else {
        //cancelled
    }
});

Xamarin.Mac Unified API和System.Windows.Forms

1 个答案: