使用实体框架代码优先更改表（添加列）的最便捷方法？

Question

I use Code First Entity Framework 6.0 approach and have BaseClass and some of DerivedClass es. I used to manually update database (all tables derived from BaseClass ).

I want to update (doesn't matter where) data 1 time.

Classes:

public class IItem {

    public int Id {
        get;
        set;
    }

    public string Model {
        get;
        set;
    }

    public int Cost {
        get;
        set;
    }

    //other properties

}


public class MotherBoard : IItem {

    public string Manufacturer {
        get;
        set;
    }

    public string FormFactor {
        get;
        set;
    }

    public string CPUManufacturer {
        get;
        set;
    }

    public string Socket {
        get;
        set;
    }

    public int SocketCount {
        get;
        set;
    }

    //other properties

}

//there are 3 more classes

Ef context:

public class EFDbContext : DbContext {

    public IDbSet<MotherBoard> MotherBoards {
        get;
        set;
    }


    public IDbSet<Processor> Processors {
        get;
        set;
    }


    public IDbSet<VideoCard> VideoCards {
        get;
        set;
    }


    //other

}

Answer 1

Hi could you post your code for your classes and context class?

What versions are you using of EF and in what context?

Do you have just the one context? If so try in PowerShell whilst targeting the project with your context

enable-migrations
add-migration Initial
update-database