public void DeleteCategories(DeleteCategoriesParameter param)
{
using (var scope = DbScope.Create())
using (var context = base.CreateContext())
{
scope.BeginTransaction();
var q = context.NewsCategories.Where(t => param.RowIDSet.Contains(t.RowID));
foreach (var item in q)
{
if (context.News.Any(t => t.CategoryID == item.RowID))
{
throw new InvalidInvokeException("不能删除有新闻的分类");
}
//更新子类的父类为被删除类别的父类。
context.NewsCategories.Update(t => t.ParentID == item.RowID, t => new NewsCategory {
ParentID = item.ParentID
});
}
q.Delete();
scope.Complete();
}
CacheInterceptorAttribute.ClearCache(_QueryCategories);
}
public void DeleteCategories(DeleteCategoriesParameter param)
{
var repository = new NewsRepository();
repository.DeleteCategories(param);
}
