在我的项目中,我首先使用实体框架代码创建Appointments表。当我设置整数主键,将AppointmentNo设置为[Key]和[Required]时,它会创建初始主键从1开始的表。[DataContract]{ [Key] public int AppointmentNo { get; set; }
[Required]
我试图使用控制台应用程序执行命令add-migration,除了控制台应用程序之外,我在一个项目中创建了一个上下文,但是当我试图运行它时,它会给出错误,我使用的是.NET 6:
Unable to resolve service for type 'Microsoft.EntityFrameworkCore.Migrations.IMigrator'. This is often because no database provider has been configured for this DbContext. A provider can be configured by