Entity Framework Core
Sample Code to Create, Read, Update and Delete (CRUD) records, EF Core Many to Many relationship
This article explains how CRUD(Create, read, update, delete) operations can be performed using Entity Framework Core on tables connected through a many-to-many relationship. An asp.net core razor page application is used to demonstrate this.
Configure Many-to-Many Relationships in Entity Framework Core Code First
In RDBMS, we call a relationship between two tables many to many when more than one record in one table is associated with multiple records in the other table. In EF Core 5.0, a many to many relationship can be created without defining a joining table.
Fix: The term 'add-migration' is not recognized as the name of a cmdlet, function, script file, or operable program.
add-migration : The term 'add-migration' is not recognized as the name of a cmdlet, function, script file, or operable program.Check the spelling of the name, or if a path was included,verify that the path is correct and try again.
The seed entity for entity type 'X' cannot be added because a non-zero value is required for property 'Id'
In Entity Framework Core, primary key properties are converted to identity columns if the database provider is SQL Server. But when we try to seed a database table with an identity column, the corresponding property value should be provided, as the migration scripts are generated by Entity Framework without connecting to the database.