// 选择一个本地文件
private async void btnPickLocalFile_Click(object sender, RoutedEventArgs e)
{
StorageFile file = await Package.Current.InstalledLocation.GetFileAsync(@"Assets\hololens.jpg");
if (_fileOpenPickerUI.CanAddFile(file))
{
AddFileResult result = _fileOpenPickerUI.AddFile("myFile", file);
lblMsg.Text = "选择的文件: " + file.Name;
lblMsg.Text += Environment.NewLine;
lblMsg.Text += "AddFileResult: " + result.ToString();
}
}
private void OnSelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (e.AddedItems != null)
{
var addedStickers = e.AddedItems.OfType <Sticker>();
foreach (var item in addedStickers)
{
if (_pickerUi.CanAddFile(item.File))
{
_pickerUi.AddFile(item.File.Path, item.File);
}
}
}
if (e.RemovedItems != null)
{
var removedItems = e.RemovedItems.OfType <Sticker>();
foreach (var item in removedItems)
{
if (_pickerUi.ContainsFile(item.File.Path))
{
_pickerUi.RemoveFile(item.File.Path);
}
}
}
}
public async Task Add(PickedFile file)
{
IStorageFile f = null;
if (file.Source == PickedFileSource.Local)
{
f = await StorageFile.GetFileFromPathAsync(file.Path);
}
else if (file.Source == PickedFileSource.Uri)
{
var uri = new Uri(file.Path);
f = await StorageFile.CreateStreamedFileFromUriAsync(Path.GetFileName(file.Path), uri, RandomAccessStreamReference.CreateFromUri(uri));
}
else
{
throw new ArgumentException("Unknown File source.", nameof(f));
}
lock (syncObject)
{
if (fileOpenPickerUI.CanAddFile(f))
{
fileOpenPickerUI.AddFile(file.Path, f);
}
}
}
/// <summary>
/// Invoked when the selected collection of files changes.
/// </summary>
/// <param name="sender">The GridView instance used to display the available files.</param>
/// <param name="e">Event data that describes how the selection changed.</param>
private void HandleSelectedFileChanged(Object sender,
SelectionChangedEventArgs e)
{
// Update the picker 'basket' with the newly selected items
foreach (var addedFile in e.AddedItems.Cast <FileInfo>())
{
if (_fileOpenPickerUI.CanAddFile(addedFile.File))
{
_fileOpenPickerUI.AddFile(addedFile.Title, addedFile.File);
}
}
// Update the picker 'basket' to remove any newly removed items
foreach (var removedFile in e.RemovedItems.Cast <FileInfo>())
{
if (_fileOpenPickerUI.ContainsFile(removedFile.Title))
{
_fileOpenPickerUI.RemoveFile(removedFile.Title);
}
}
}