实体类型不能通用 [英] Entity types cannot be generic
问题描述
我在域服务中使用以下功能,
I am using the following function in the Domain Service,
public IQueryable<Dictionary<discussion_category, List<discussion_board>>> GetDiscussion_categoriesWithBoards()
{
return new[] {
GetDiscussion_categories().Select(c => new {
Category = c,
Boards = GetDiscussion_boardsByCategory(c.ID).ToList()
}).ToDictionary(i => i.Category, i => i.Boards.ToList())
}.AsQueryable();
}
似乎没有错误,编译时我收到以下错误, p>
seems to have no errors and i get the following error while compiling,
类型'Dictionary`2'不是有效的
实体类型。实体类型不能是
通用。
Type 'Dictionary`2' is not a valid entity type. Entity types cannot be generic.
可能是什么问题?
推荐答案
类型 Dictionary< discussion_category,List< discussion_board>>
不是通过Ria服务发送的有效类型,不幸的是,您只能发送 IQueryable< Entity>
(尽可能记住)
The type Dictionary<discussion_category, List<discussion_board>>
is not a valid type to send over Ria services, unfortunately you can only send IQueryable<Entity>
(As far as I can remember)
如果要发送另外,你可能想看看 InvokeOperation 和创建复杂类型(请参阅此 blog )。
If you want to send something else, you might want to have a look at the InvokeOperation and creating Complex Types (see Complex types in this blog).
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