/// <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>
/// 添加一条记录
/// </summary>
/// <param name="folderModel">文件夹</param>
public void Add(FolderModel folderModel)
{
if (FolderModels.Contains(folderModel))
{
return;
}
_databaseHelper.FolderDatabase.Insert(folderModel.FolderPath, folderModel.AccessToken);
FolderModels.Add(folderModel);
}
/// <summary>
/// 删除一条记录
/// </summary>
/// <param name="folderModel">文件夹</param>
public void Delete(FolderModel folderModel)
{
if (!FolderModels.Contains(folderModel))
{
return;
}
// 从图片数据库中删掉这个文件夹相关的图片
_databaseHelper.ImageDatabase.Delete(folderModel.KeyNo);
// 从数据库里删掉这个文件夹
_databaseHelper.FolderDatabase.Delete(folderModel.FolderPath);
// 从使用list里删掉这个文件夹
StorageApplicationPermissions.FutureAccessList.Remove(folderModel.AccessToken);
FolderModels.Remove(folderModel);
}
private ImageFolderList(FolderModel folderModel)
{
_folderModel = folderModel;
_databaseHelper = DatabaseHelper.GetInstance();
ImageModels = new List <ImageModel>();
}