Linq-除了一个列表,另一个列表中有项目 [英] Linq - Except one list with items in another
问题描述
我认为我的问题很简单,但是我是linq的新手...所以我在这里很难过
I think my question is easy, but I'm a newbie in linq... So I'm having a hard time here
我的系统调用了一个称为serviceTOP的服务,该服务向我返回了itemTOP {Id, Name}
的列表.
My system calls a service, called serviceTOP, that returns me a list of itemTOP {Id, Name}
.
这些ItemsTOP不在我的系统中,但是用户可以选择要导入到系统中的itemTOP.
These ItemsTOP aren't in my system, but the user can choose which itemTOP to import to the system.
导入的ItemsTOP成为对象Item { Id, IdTOP, Name }
The imported ItemsTOP becomes an object Item { Id, IdTOP, Name }
因此,当系统调用serviceTOP时,在将其显示给用户之前,我必须从列表中过滤已导入的项目.
So, when the system calls serviceTOP, before showing them to the user, I must filter the already imported items from the list.
我们去编写代码:
IList<ItemsTOP> listTOP = new ServiceTOP().GetItemsTOP();
IList<Items> list = new WCFServiceClient().GetItems();
var filteredListTOP = listTOP.Select( i => i.Id ).Except( i => i.IdTOP );
这种工作方式,但是它返回仅包含id的字符串列表.
This kind of works, but it returns a list of strings containing only the id.
我想同时选择TOP的ID和名称.
I'd like to select both id and name of the TOP.
提前谢谢.
推荐答案
更改此内容:
var filteredListTOP = listTOP.Select(i => i.Id ).Except( i => i.IdTOP );
对此:
var filteredListTOP = listTOP.Select(i => new { ID = i.id, Name = i.Name} ).Except( i => i.IdTOP );
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