What Is Entity Framework Firstordefault?

Robert Thorne
Robert Thorne
• • 6 min read

First or Firstordefault Is Used When You Expect More Than One Record in the Database. This Method Returns the First Matching Row from the Database. If No...

What Is Entity Framework Firstordefault?
First or FirstOrDefault is used when you expect more than one record in the database. This method returns the first matching row from the database. If no records found in the database, then First will throw an exception, while FirstOrDefault returns the default value.

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Keeping this in view, what is FirstOrDefault?

FirstOrDefault. Returns the first element of a collection, or the first element that satisfies a condition. Returns a default value if index is out of range.

One may also ask, how do I use Find in Entity Framework? 2 Answers. The point is that Find starts by searching in the local cache of the context. If no match are found then it sends a query to the db. The Find method on DbSet uses the primary key value to attempt to find an entity tracked by the context.

Just so, what is Entity Framework in asp net?

Entity Framework is an open-source ORM framework for . NET applications supported by Microsoft. It enables developers to work with data using objects of domain specific classes without focusing on the underlying database tables and columns where this data is stored.

What is DbContext and DbSet in Entity Framework?

A DbContext corresponds to your database (or a collection of tables and views in your database) whereas a DbSet corresponds to a table or view in your database.

Related Question Answers

Can FirstOrDefault return null?

FirstOrDefault returns the default value of a type if no item matches the predicate. For reference types that is null . Thats the reason for the exception.

Must Read

What is the difference between FirstOrDefault and SingleOrDefault?

Semantical Difference:
FirstOrDefault returns a first item of potentially multiple (or default if none exists). SingleOrDefault assumes that there is a single item and returns it (or default if none exists). Multiple items are a violation of contract, an exception is thrown.
Robert Thorne

Robert Thorne

Automotive & Future Transportation Editor
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Robert Thorne covers electric vehicle innovations, autonomous driving systems, global mobility trends, and automotive engineering developments.