/// <summary>
/// 构造子项的更新设置
/// </summary>
internal ComparedSetter <TSub> GetSubUpdateSet(T syncItem)
{
_mainItem = syncItem;
if (_subSetter == null)
{
_subSetter = new ComparedSetter <TSub>();
if (OnAppendSub != null)
{
_subSetter.OnAdd = sub => OnAppendSub(_mainItem, sub);
}
if (OnRemoveSub != null)
{
_subSetter.OnDelete = sub => OnRemoveSub(_mainItem, sub);
}
}
return(_subSetter);
}
/// <summary>
/// 对比同步数据修改，并执行增、改、删操作
/// </summary>
protected void CompareDataChange <T>(ICollection <T> dbData, ICollection <T> syncData, Func <T, DbSet <T> > getDbSet, ComparedSetter <T> setter = null)
where T : class, IDataComparable <T>
{
if (syncData == null)
{
if (dbData?.Count > 0)
{
LogService.ErrorFormat("比对数据修改时syncData为null，dbData count:{0}\r\n{1}", dbData.Count, Environment.StackTrace);
}
return;
}
if (dbData == null)
{
dbData = new List <T>();
}
//检查修改
foreach (var newItem in syncData)
{
var dbItem = dbData.FirstOrDefault(x => x.SameAs(newItem));
if (dbItem == null) //新增
{
if (setter?.OnAdd == null || setter.OnAdd(newItem))
{
getDbSet(newItem).Add(newItem);
}
}
else //修改
{
dbItem.Update(newItem, setter);
}
}
//检查删除项
foreach (var item in dbData.Where(d => !syncData.Any(s => s.SameAs(d))))
{
if (setter?.OnDelete == null || setter.OnDelete(item))
{
getDbSet(item).Remove(item);
}
}
}