/// <summary>
/// 删除一条记录
/// </summary>
/// <param name="memoryModel">回忆</param>
public void Delete(MemoryModel memoryModel)
{
if (!MemoryModels.Contains(memoryModel))
{
return;
}
MemoryModels.Remove(memoryModel);
_databaseHelper.MemoryListDatabase.Delete(memoryModel.KeyNo);
// 在回忆图片数据库里删图片
_databaseHelper.MemoryImageDatabase.Delete(memoryModel.KeyNo);
}
/// <summary>
/// 添加一条记录
/// </summary>
/// <param name="memoryModel">回忆</param>
public void Add(MemoryModel memoryModel)
{
if (MemoryModels.Contains(memoryModel))
{
return;
}
MemoryModels.Add(memoryModel);
_databaseHelper.MemoryListDatabase.Insert(memoryModel.MemoryName);
var lastKeyNo = _databaseHelper.MemoryListDatabase.GetLastKeyNo();
// 在回忆图片数据库里加图片
foreach (var imageModel in memoryModel.ImageModels)
{
_databaseHelper.MemoryImageDatabase.Insert(lastKeyNo, imageModel.KeyNo);
}
}
/// <summary>
/// 异步获取实例
/// </summary>
/// <returns>回忆列表</returns>
public static async Task <MemoryList> GetInstanceAsync()
{
var memoryList = new MemoryList();
// 初始化list
var query = memoryList._databaseHelper.MemoryListDatabase.GetQuery();
while (query.Read())
{
var memoryKeyNo = query.GetInt32(0);
// 初始化图片list
var imageModels = new List <ImageModel>();
var imageQuery = memoryList._databaseHelper.MemoryImageDatabase.GetQuery(memoryKeyNo);
while (imageQuery.Read())
{
var imagePath = imageQuery.GetString(2);
var accessToken = imageQuery.GetString(3);
var imageModel = await ImageModel.GetInstanceAsync(imageQuery.GetInt32(1), imagePath, accessToken);
// 查下这个图片还在不在
if (imageModel != null)
{
imageModel.KeyNo = imageQuery.GetInt32(0);
imageModels.Add(imageModel);
}
else
{
// 从数据库里删掉这个图片
memoryList._databaseHelper.ImageDatabase.Delete(imagePath);
// 从使用list里删掉这个文件夹
StorageApplicationPermissions.FutureAccessList.Remove(accessToken);
}
}
// 初始化回忆model
var memoryModel = new MemoryModel
{
KeyNo = memoryKeyNo,
MemoryName = query.GetString(1),
ImageModels = imageModels
};
memoryList.MemoryModels.Add(memoryModel);
}
return(memoryList);
}