How to insert data by using LINQ to SQL concept

Question

Khushi Singh · Answer

When working with LINQ to SQL in C#, data insertion requires proper implementation of data context alongside mapped classes. The C# classes and LINQ queries enable LINQ to SQL to automatically perform database table mapping for CRUD operations.

The process of data insertion with LINQ to SQL functions as follows:

Step-by-Step Overview (Theory)

Create a DataContext: This represents your database and handles the connection.

Define Entity Classes: These are mapped to your database tables using the Object Relational Designer (DBML file).

Create an Object: Instantiate the entity class and populate its properties with data.

Insert the Object: Use the InsertOnSubmit() method on the corresponding table.

Submit Changes: Call SubmitChanges() on the DataContext to push the new record into the database.

Code Example

using (MyDataContext db = new MyDataContext())
{
   // Create a new record
   Student newStudent = new Student();
   newStudent.Name = "John Doe";
   newStudent.Age = 22;
   newStudent.Email = "john.doe@example.com";
   // Add the object to the Students table
   db.Students.InsertOnSubmit(newStudent);
   // Commit the insert to the database
   db.SubmitChanges();
}

This example uses MyDataContext as the LINQ to SQL data context which came from a .dbml file and Student represents the table-mapped class. The insertion sequence requires you to create a Student object with value assignments followed by a call to SubmitChanges() to implement the changes.

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How to insert data by using LINQ to SQL concept

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