工厂模式

抽象类
public abstract class Factory
{
     public abstract Role GetRole();       
}
角色类
public abstract  class Role
    {
        public abstract List<Leixing> GetLeixing();
        public abstract List<OrmsTable> GetOrms();
        public abstract List<OrmsTable> GetOrmsTable(OrmsTable or);
        public abstract int AddOrm(Orms or);
    }
建立一个类：继承一个工厂
public class OrmsFactory : Factory
    {
        public override Role GetRole()
        {
            return new OrmsRole();
        }
    }
建立一个产品角色：继承角色类
public class OrmsRole : Role
    {
        /// <summary>
        /// 添加注册人信息
        /// </summary>
        /// <param name="or"></param>
        /// <returns></returns>
        public override int AddOrm(Orms or)
        {
            return OrmBll.AddOrm(or);
        }
    }
在控制器中实例化一个OrmsFactory
Factory fac;
fac=new OrmsFactory();
var model=role.AddOrm(m);
return model;