过滤 DBSet、DBSet.AsQueryable() 或 DBSet.AsQueryable<t> ()</t>

Question

Should you add filtering (and eg ordering) to the DBSet object or first call DBSet.AsQueryable() or DBSet.AsQueryable()?

In which case do you need to use the next functions?

Context.Set<T>().Where<>
Context.Set<T>().AsQueryable<T>().Where<>
Context.Set<T>().AsQueryable().Where<>

Answer 1

There is no need to call IQueryable because DBSet<T> result is already returning as queryable.

For example this:

Context.Set<MyTable>.Where(i => i.itemId == 1) // returns IQuerable<MyTable>

will return a list of IQueryable results.