作者:手机用户2702935840 | 来源:互联网 | 2024-11-01 11:46
在运行时动态获取EntityFramework中的ObjectSet可以通过反射机制实现。这种方法允许开发者在应用程序运行期间根据需要加载不同的实体集合,从而提高代码的灵活性和可扩展性。通过使用`DbContext`类的`Set`方法,结合类型信息,可以轻松地实现这一目标。此外,还可以利用`Type`对象和泛型方法来进一步增强动态性,确保在处理多种实体类型时更加高效和安全。
(Note, the code below are just examples. Please don't comment on the why this is necessary. I would appreciate a definitive answer of YES or NO, like if it is possible then how? If not it's fine too. If the question is vague let me know also. Thanks!)
(注意,下面的代码只是示例。请不要评论为什么这是必要的。我希望肯定回答是或否,如果有可能那么如何?如果不是也没关系。如果问题很模糊也让我知道。谢谢!)
Example, I can get ObjectSet<T> below:
例如,我可以在下面获得ObjectSet
:
ObjectSet userSet = dbContext.CreateObjectSet();
ObjectSet categorySet = dbContext.CreateObjectSet();
The code above works okay. However, I need the entity table to be dynamic so I can switch between types. Something like below.
上面的代码工作正常。但是,我需要实体表是动态的,所以我可以在类型之间切换。像下面的东西。
//var type = typeof(Users);
var type = typeof(Categories);
Object objectSet = dbContext.CreateObjectSet();
But the code above will not compile.
但上面的代码将无法编译。
[EDIT:] What I'd like is something like, or anything similar:
[编辑:]我想要的是类似的东西,或类似的东西:
//string tableName = "Users";
string tableName = "Categories";
ObjectSet objectSet = dbContext.GetObjectSetByTableName(tablename);
3 个解决方案