What is an IQueryable?
IQueryable is suitable for querying data from out-memory (like remote database, service) collections. While querying data from a database, IQueryable executes a “select query” on server-side with all filters. IQueryable is beneficial for LINQ to SQL queries.
What is lazy loading and eager loading in C#?
Lazy loading in Entity Framework is the default phenomenon that happens for loading and accessing the related entities. However, eager loading is referred to the practice of force-loading all these relations.
Does IQueryable implement IEnumerable?
The IQueryable interface inherits the IEnumerable interface so that if it represents a query, the results of that query can be enumerated.
When should I use IQueryable and IEnumerable using LINQ?
In LINQ to query data from database and collections, we use IEnumerable and IQueryable for data manipulation. IEnumerable is inherited by IQueryable, Hence IQueryable has all the features of IEnumerable and except this, it has its own features. Both have its own importance to query data and data manipulation.
When to use IEnumerable or icollection or IList or list?
When to use icollection or IEnumerable or IList or list? IEnumerable contains only GetEnumerator method, like read-only iterate. ICollection is one step ahead of IEnumerable. If we want some more functionality like Add or remove element, then it is better to go with ICollection because we cannot achieve that with IEnumerable.
When to use IQueryable?
– The client makes a call to fetch data with filters using Entity Framework with IQueryable – SQL Server receives a request, It returns all the data after applying all the specified filter – The client receives a response as expected. Now the client won’t worry about filtering the records as they are already been filtered.
Should I return an IEnumerable or IList?
If you want to return something with an ordering that matters and give them the ability to change that ordering,then give them a list.
How to use IQueryable?
Type Parameters. The type of the elements of source.