EF Code First Migrations Database migration

1>, in the Package Manager console, execute the statement:

Pm> enable-migrations-enableautomaticmigrations

After execution succeeds, add the Migrations folder to the application code structure, and generate the class file Configuration.cs.

2>, in the Package Manager console, execute the statement:

Pm> add-migration Initialcreate

After successful execution, new class files are added in the Migrations folder month and day seconds _initialcreate.cs

3>, in the Package Manager console, execute the statement:

Pm> Update-database-verbose

Execution results generate a database consistent with the above

4>, add the model class in the database model, execute the Package Manager console statement, migrations the new class file in the folder month Day time _model class. cs.

Pm> Add-migration Model Class

　　

Execute the Package Manager console statement again

Pm> Update-database-verbose

Version backtracking

Modify the table for the table model class in the database. Execute the following two statements in the Package Manager console:

Pm> add-migration modifycity

Pm> Update-database-verbose

After successful execution, the model table structure modifies the

Executes the Package Manager console statement for database version backtracking.

Pm> update-database–targetmigration: To the CS file under the Migrations folder

EF Code First Migrations Database migration