通用ObjectContext?objectContext.GetObjectSet& lt; TEntity& gt ;? [英] Generic ObjectContext? objectContext.GetObjectSet<TEntity>?

问题描述

是否可以获取指定泛型类型的 ObjectQuery< T> ?

Is there a way to get ObjectQuery<T> for specfied generic type?

伪:

public partial class MyObjectContext
{
    public ObjectSet<TEntity> GetObjectSet<TEntity>()
    {
        return Helper.GetObjectSet<TEntity>(this);
    }
}

推荐答案

是的，这是您需要的:

public partial class MyObjectContext
{
    public ObjectSet<TEntity> GetObjectSet<TEntity>()
    {
        return this.CreateObjectSet<TEntity>();
    }
}

如您所见，不需要您的辅助方法，因为您可以直接在 MyObjectContext 实例上调用 CreateObjectSet .它将返回从 ObjectQuery< TEntity> 派生的 ObjectSet< TEntity> .TEntity必须为映射类型，并且不能为实体层次结构中的派生类型.

As you can see your helper method is not needed because you can call CreateObjectSet directly on MyObjectContext instance. It will return ObjectSet<TEntity> which is derived from ObjectQuery<TEntity>. TEntity must be mapped type and it cannot be derived type in entity hierarchy.

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