What is the difference between the IQueryable and IEnumerable interface?
Both IEnumerable and IQueryable are forward collection. Querying data from a database, IEnumerable execute a select query on the server side, load data in-memory on a client-side and then filter data. Querying data from a database, IQueryable execute the select query on the server side with all filters.
What is IEnumerable IQueryable?
IEnumerable and IQueryable are used for data manipulation in LINQ from the database and collections. For getting the data from the database, I have created a table named “Employee” that has some data and looks like: dbml class) in your project that converts the database table named “Employee” as a class.
Which one is better IEnumerable or IQueryable?
IEnumerable: IEnumerable is best suitable for working with in-memory collection (or local queries). IEnumerable doesn’t move between items, it is forward only collection. IQueryable: IQueryable best suits for remote data source, like a database or web service (or remote queries).
What is the difference between returning IQueryable T vs IEnumerable T?
The main difference between “IEnumerable” and “IQueryable” is about where the filter logic is executed. One executes on the client side (in memory) and the other executes on the database.
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.
What is the difference between IQueryable and IEnumerable?
The IQueryable interface is intended for implementation by query providers. This interface inherits the IEnumerable interface so that if it represents a query, the results of that query can be enumerated.
What is the purpose of the IQueryable interface?
The IQueryable interface is intended for implementation by query providers. This interface inherits the IEnumerable interface so that if it represents a query, the results of that query can be enumerated. Enumeration forces the expression tree associated with an IQueryable object to be executed.
What is LINQ IQueryable?
Linq. IQueryable More… The IQueryable interface is intended for implementation by query providers. It is only supposed to be implemented by providers that also implement IQueryable . If the provider does not also implement IQueryable , the standard query operators cannot be used on the provider’s data source.
What happens if a provider does not implement IQueryable?
If the provider does not also implement IQueryable , the standard query operators cannot be used on the provider’s data source. The IQueryable interface inherits the IEnumerable interface so that if it represents a query, the results of that query can be enumerated.
