| public SetThumbnailPrefetch ( [ mode, [ requestedSize, [ options ) : void | ||
| mode | [ | |
| requestedSize | [ | |
| options | [ | |
| Résultat | void | |
//public ObservableCollection<ImageItem> Source = new ObservableCollection<ImageItem>();
public async Task Init()
{
var queryOptions = new QueryOptions(CommonFileQuery.OrderByDate,
new string[] { ".jpg", ".png", ".jpeg", ".bmp" })
{
FolderDepth = FolderDepth.Deep,
IndexerOption = IndexerOption.OnlyUseIndexer,
UserSearchFilter = "System.Kind:=System.Kind#Picture"
};
queryOptions.SetThumbnailPrefetch(ThumbnailMode.SingleItem, 256, ThumbnailOptions.UseCurrentScale);
var _fileQueryResult = KnownFolders.PicturesLibrary.CreateFileQueryWithOptions(queryOptions);
var files = await _fileQueryResult.GetFilesAsync();
Debug.WriteLine("Count " + files.Count);
var list = new List<ImageItem>();
foreach (var f in files)
{
list.Add(new ImageItem()
{
LocalPath = f.Path
});
}
Source = new RangeCollection(list);
Source.Init();
}
private async void LoadPhoto()
{
var queryOptions = new Windows.Storage.Search.QueryOptions(CommonFileQuery.OrderByDate, null);
queryOptions.SetThumbnailPrefetch(ThumbnailMode.PicturesView, 100,
ThumbnailOptions.ReturnOnlyIfCached);
//queryOptions.SetPropertyPrefetch(PropertyPrefetchOptions.ImageProperties, new string[] { "System.Size" });
queryOptions.SetThumbnailPrefetch(ThumbnailMode.ListView, 80, ThumbnailOptions.ReturnOnlyIfCached);
StorageFileQueryResult queryResults = KnownFolders.PicturesLibrary.CreateFileQueryWithOptions(queryOptions);
IReadOnlyList <StorageFile> files = await queryResults.GetFilesAsync();
foreach (var file in files)
{
var thumbnail = await file.GetThumbnailAsync(ThumbnailMode.ListView, 40, ThumbnailOptions.ReturnOnlyIfCached);
thumbnailList.Add(thumbnail);
debugText.Text = thumbnailList.Count.ToString();
//BitmapImage bm = new BitmapImage();
//bm.SetSource(thumbnail);
//photoList.Add(bm);
//ImageProperties imageProperties = await file.Properties.GetImagePropertiesAsync();
//// Do something with the date the image was taken.
//DateTimeOffset dateTaken = imageProperties.DateTaken;
//// Performance gains increase with the number of properties that are accessed.
//IDictionary<String, object> propertyResults =
// await file.Properties.RetrievePropertiesAsync(
// new string[] { "System.Size" });
//// Get/Set extra properties here
//var systemSize = propertyResults["System.Size"];
}
}
protected override async void OnInitialize()
{
base.OnInitialize();
var localFolders = new[]
{
KnownFolders.MusicLibrary,
KnownFolders.PicturesLibrary,
KnownFolders.VideosLibrary
};
var serverFolders = await KnownFolders.MediaServerDevices.GetFoldersAsync();
var queryOptions = new QueryOptions
{
FolderDepth = FolderDepth.Deep,
UserSearchFilter = Query
};
queryOptions.SetThumbnailPrefetch(ThumbnailMode.ListView, 150, ThumbnailOptions.UseCurrentScale);
foreach (var folder in localFolders.Concat(serverFolders))
{
var itemQuery = folder.CreateItemQueryWithOptions(queryOptions);
var items = await itemQuery.GetItemsAsync();
if (items.Count == 0)
continue;
var itemViewModels = items.Select<IStorageItem, StorageItemViewModel>(i =>
{
if (i.IsOfType(StorageItemTypes.Folder))
return new StorageFolderViewModel((StorageFolder) i);
if (i.IsOfType(StorageItemTypes.File))
return new StorageFileViewModel((StorageFile) i);
return null;
}).Where(v => v != null);
GroupedStorageItems.Add(new StorageItemGroupViewModel(folder.DisplayName, itemViewModels));
}
await LoadThumbnailsAsync();
}
