/// <summary>
/// 异步获取实例
/// </summary>
/// <returns></returns>
public static async Task <FolderList> GetInstanceAsync()
{
var folderList = new FolderList();
// 初始化list
var query = folderList._databaseHelper.FolderDatabase.GetQuery();
while (query.Read())
{
var folderModel = new FolderModel
{
KeyNo = query.GetInt32(0),
FolderPath = query.GetString(1),
AccessToken = query.GetString(2)
};
// 查下这个文件夹还在不在
var folder = await folderModel.GetFolder();
if (folder != null)
{
folderList.FolderModels.Add(folderModel);
}
else
{
// 从图片数据库中删掉这个文件夹相关的图片
folderList._databaseHelper.ImageDatabase.Delete(folderModel.KeyNo);
// 从数据库里删掉这个文件夹
folderList._databaseHelper.FolderDatabase.Delete(folderModel.FolderPath);
// 从使用list里删掉这个文件夹
StorageApplicationPermissions.FutureAccessList.Remove(folderModel.AccessToken);
}
}
return(folderList);
}
/// <summary>
/// 刷新list
/// </summary>
/// <returns></returns>
public async Task RefreshAsync()
{
var folder = await _folderModel.GetFolder();
// TODO 这里文件夹可能为空
// 找到全部文件
var files = await folder.GetFilesAsync();
foreach (var file in files)
{
// 确认后缀名必须是图片
if (file.FileType != ".jpg" && file.FileType != ".png" && file.FileType != ".jpeg")
{
continue;
}
var accessToken = StorageApplicationPermissions.FutureAccessList.Add(file);
var imageModel = await ImageModel.GetInstanceAsync(_folderModel.KeyNo, file.Path, accessToken);
Add(imageModel);
}
}