public StorageEntry(StorageFile file, StorageEntryUsage usage)
{
this.EntryType = StorageEntryType.File;
this.ContentType = SEContentAgency.AnyalizeStorageEntryContent(file);
this._storageItem = file;
this.LoadThumbnail(usage);
}
public StorageEntry(IStorageItem item, StorageEntryUsage usage)
{
if (item is StorageFile file)
{
this.EntryType = StorageEntryType.File;
this.ContentType = SEContentAgency.AnyalizeStorageEntryContent(file);
this._storageItem = item;
this.LoadThumbnail(usage);
}
else
{
this.EntryType = StorageEntryType.Folder;
this.ContentType = SEContent.Folder;
this._storageItem = item;
this.LoadThumbnail(usage);
}
}
// http://www.cnblogs.com/hebeiDGL/archive/2012/09/27/2705478.html
// Configure Thumbnail
private async void LoadThumbnail(StorageEntryUsage usage)
{
switch (this.EntryType)
{
case StorageEntryType.File:
this.ThumbSource = new BitmapImage();
StorageItemThumbnail thumbnail = null;
switch (usage)
{
case StorageEntryUsage.TilesFieldItem:
case StorageEntryUsage.ColumnFieldItem:
thumbnail = await File.GetThumbnailAsync(
SEContentAgency.FieldItemThumbnailModes[(int)ContentType],
60, // Requested size
ThumbnailOptions.ReturnOnlyIfCached); // TODO: Test the ThumbnailOptions
break;
case StorageEntryUsage.PanelPreview:
thumbnail = await File.GetThumbnailAsync(
SEContentAgency.PanelPreviewThumbnailModes[(int)ContentType],
150, // Requested size
ThumbnailOptions.UseCurrentScale);
break;
case StorageEntryUsage.ParentFolder:
this.ThumbSource = null;
return; // 没有必要加载该文件夹的略缩图,直接结束本方法
}
if (thumbnail is null)
{
switch (usage)
{
case StorageEntryUsage.ColumnFieldItem:
case StorageEntryUsage.TilesFieldItem:
this.ThumbSource.UriSource = SEContentAgency.GetDefaultThumbnailUri(this.ContentType); break;
case StorageEntryUsage.PanelPreview:
this.ThumbSource.UriSource = SEContentAgency.GetDefaultPreviewUri(this.ContentType); break;
}
}
else
{
this.ThumbSource.SetSource(thumbnail);
}
break;
case StorageEntryType.Folder:
switch (usage)
{
case StorageEntryUsage.TilesFieldItem:
case StorageEntryUsage.ColumnFieldItem:
this.ThumbSource = new BitmapImage(new Uri("ms-appx:///Assets/THUMB/Folder_Small.png")); break;
case StorageEntryUsage.PanelPreview:
this.ThumbSource = new BitmapImage(new Uri("ms-appx:///Assets/THUMB/Folder_Medium.png")); break;
case StorageEntryUsage.ParentFolder:
this.ThumbSource = null;
return; // 没有必要加载该文件夹的略缩图,直接结束本方法
}
break;
}
}
