如何在UWP中的应用程序中将任意位置的图像或文件复制或删除到文件夹中

Question

I have tried to copy image or file from computer to local folder in UWP Application but I have not done it. I always told that file is access denied. I searched on google and UWP sources in Microsoft website and I used most of the ways which I got from those links that I got. but I have not got it.

Answer 1

Thanks too much. I found the solution and your answers are useful.

this is the solution

This is the upload Button Image

        private async void BtnAddImage_OnClick(object sender, RoutedEventArgs e)
    {
        var imagePicker = new FileOpenPicker
        {
            ViewMode = PickerViewMode.Thumbnail,
            SuggestedStartLocation = PickerLocationId.Desktop,
            FileTypeFilter = { ".jpg", ".png", ".bmp", ".gif", ".tif" }
        };


        var imageFile = await imagePicker.PickSingleFileAsync();
        if (imageFile == null)
        {
            return;
        }

        _storageFile = imageFile;
        _path = imageFile.Path;

        var dataPackage = new DataPackage();

        dataPackage.SetBitmap(RandomAccessStreamReference.CreateFromFile(imageFile));
        Clipboard.SetContent(dataPackage);




        var dataPackageView = Clipboard.GetContent();
        if (!dataPackageView.Contains(StandardDataFormats.Bitmap)) return;


        IRandomAccessStreamReference imageReceived = await dataPackageView.GetBitmapAsync();


        if (imageReceived == null) return;
        using (var imageStream = await imageReceived.OpenReadAsync())
        {
            var bitmapImage = new BitmapImage();
            bitmapImage.SetSource(imageStream);
            ImgSupplier.Source = bitmapImage;

        }

        StorageApplicationPermissions.FutureAccessList.Add(imageFile);
    }

retrun the path

    private static string GetPath(string folderName)
    {

  var root = Windows.ApplicationModel.Package.Current.InstalledLocation.Path + @"\Assets\";

        var fullPath = Path.Combine(root, folderName);
        return fullPath;
    }

This is a save button

    private StorageFile _storageFile;   
    private async void BtnAddExpenditure_OnClick(object sender, RoutedEventArgs e)
    {
        var getPath = GetPath("Companies");

        var folder = await StorageFolder.GetFolderFromPathAsync(getPath);
        await _storageFile.CopyAsync(folder, Guid.NewGuid() + "." + _storageFile.FileType);
    }

Answer 2

By default, UWP apps do not have access to the file system, there are a couple ways to gain access while still giving the user control over the action. The first one is through the file picker, you can save a token after the user picks a file so that you can access the file again in the future without asking the user. Another option is to use the BroadFileAccess capability in order to access files without asking the user to choose it in the file picker. Before this option works, the user will need to grant file access to the app from the Windows 10 privacy settings.