/// <summary>
/// 更新数据项
/// </summary>
/// <param name="dataItemEntity"></param>
public void UpdateDataItem(DataItemEntityDev dataItemEntity)
{
if (dataItemEntity == null || dataItemEntity.Owner == null)
{
Debug.Assert(false, "参数异常");
return;
}
string dataEntityId = dataItemEntity.Owner.Id;
//判断指定的数据实体是否存在
bool entityExist = EntityExistById(dataEntityId);
Debug.Assert(entityExist, "数据实体不存在");
if (entityExist == false)
{
return;
}
//拿数据实体文件
string file = Path.Combine(Constant.PACKAGE_DATAENTITY_FOLDER, dataEntityId);
//在数据实体XML中更新数据项节点
//尝试从缓存中获取
XElement entityElement = (XElement)_cachingService.GetData(dataEntityId);
if (entityElement == null)
{
bool fileExist = _packageService.Current.Container(file);
Debug.Assert(fileExist, "数据实体文件不存在");
if (fileExist == false)
{
return;
}
string strEntity = _packageService.Current.GetFileContent(file);
entityElement = XElement.Parse(strEntity);
_cachingService.Add(dataEntityId, entityElement);
}
//直接更新缓存中的对象，无需更新缓存了
entityElement.XPathSelectElement(String.Format(XPATH_DataEntity_SelectItem, dataItemEntity.Id)).ReplaceWith(XElement.Parse(dataItemEntity.ToXml()));
//保存文件
_packageService.Current.AddFileContent(entityElement.ToString(), file);
//发布事件
DataItemEntityEventArgs args = new DataItemEntityEventArgs(dataItemEntity);
_eventAggregator.GetEvent <DataItemEntityUpdatedEvent>().Publish(args);
}
/// <summary>
/// 添加一个数据项
/// </summary>
/// <param name="dataItemEntity"></param>
/// <param name="parentId"></param>
public void AddDataItem(DataItemEntityDev dataItemEntity, string dataEntityId)
{
if (dataItemEntity == null || String.IsNullOrEmpty(dataEntityId))
{
Debug.Assert(false, "参数异常");
return;
}
//判断指定的数据实体是否存在
bool entityExist = EntityExistById(dataEntityId);
Debug.Assert(entityExist, "数据实体不存在");
if (entityExist == false)
{
return;
}
//拿数据实体文件
string file = Path.Combine(Constant.PACKAGE_DATAENTITY_FOLDER, dataEntityId);
//在数据实体XML中加上数据项节点
//尝试从缓存中获取
XElement entityElement = (XElement)_cachingService.GetData(dataEntityId);
if (entityElement == null)
{
bool fileExist = _packageService.Current.Container(file);
Debug.Assert(fileExist, "数据实体文件不存在");
if (fileExist == false)
{
return;
}
string strEntity = _packageService.Current.GetFileContent(file);
entityElement = XElement.Parse(strEntity);
_cachingService.Add(dataEntityId, entityElement);
}
//这里直接操作了缓存中的XElement，无需更新缓存了
entityElement.XPathSelectElement(XPATH_DataEntity_Items).Add(XElement.Parse(dataItemEntity.ToXml()));
//保存文件
_packageService.Current.AddFileContent(entityElement.ToString(), file);
//发布事件
DataItemEntityEventArgs args = new DataItemEntityEventArgs(dataItemEntity);
_eventAggregator.GetEvent <DataItemEntityAddedEvent>().Publish(args);
}