将列添加到 C# 和实体框架代码中的表中，而不删除数据库内容

Question

I have a database with several tables in AZURE SQL Server.

I want to add a new column to one of the tables, but I want to keep all the content of the tables including the table with the new column; hence I don't want to use the

Database.SetInitializer<MyDbContext>(new DropCreateDatabaseIfModelChanges<MyDbContext>());

My code looks like this:

public class DBTables : DbContext
{
    public DBTables() : base(ProductKeys.GetDbKey()) 
    {
    }

    public DbSet<ElementsForPointTable> ElementsForPointTable { get; set; }
    public DbSet<StationsDetailsTable> StationsDetailsTable { get; set; }
}

How do I do it?

Answer 1

You could use migrations to update the database scheme.

1. Open Package Manager Console (Tools -> Library Package Manager -> Package Manager Console)
2. Run Enable-Migrations command
3. Change your model
4. Run Add-Migration command in Package Manager Console.
5. Run Update-Database command to apply your model changes to the database.