Linq与IDataServiceQueryable [英] Linq with IDataServiceQueryable

问题描述

我正在编写一个LightSwitch测试应用程序。我连接到现有数据库。

I am writing a LightSwitch test application. I connect to an existing database.

我有一个非常简单的问题需要解决。我有一个ColorSet类，它与由中间表ColorSetColors实现的ColorClass有多对多的关系。我想创建一个查询来返回不在特定ColorSet中的所有颜色。

I have a very simple problem to solve. I have a ColorSet class with a many-to-many relation to a ColorClass implemented by an intermediate table ColorSetColors. I want to create a query to return all Colors not in a specific ColorSet.

我的问题更多的是Linq问题，但是作为IDataserviceQueryable< T>涉及和LightSwitch我相信这是发布这个的地方。

My problem is more of a Linq problem but as IDataserviceQueryable<T> is involved and LightSwitch I believe this is the place to post this one.

代码如下所示：

partial void ColorsNotInColorSet_PreprocessQuery（int？ColorSetID，ref IQueryable< Color> query ）

partial void ColorsNotInColorSet_PreprocessQuery(int? ColorSetID, ref IQueryable<Color> query)

推荐答案

您需要显式转换为IQueryable，就像错误消息所示。你有没有尝试过并收到其他一些错误？

You need to explicitly cast to IQueryable, just like the error message says. Have you tried that already and received some other error?

（编辑：没说错。对不起。）

( That wasn't worded correctly. Sorry about that.)

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