我在使用代码优先方法在SQL Compact 4中的Id列上设置Identity Seed时遇到了一些问题.

我试过这个

context.Database.ExecuteSqlCommand("DBCC CHECKIDENT ('Members',RESEED,100001");

但这在Sql Compact中不起作用.

MyDbContext：

protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {



        SetupMemberEntity(modelBuilder);


    }

    private static void SetupMemberEntity(DbModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Member>().Property(m => m.Id);
            //.Property(m => m.Id).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
        modelBuilder.Entity<Member>().Property(m => m.FirstName).IsRequired();
        modelBuilder.Entity<Member>().Property(m => m.LastName).IsRequired();
        modelBuilder.Entity<Member>().Property(m => m.PinCode).IsRequired();
        modelBuilder.Entity<Member>().Property(m => m.Email);
        //modelBuilder.Entity<Member>().Property(m => m.DateCreated).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Computed);
        //modelBuilder.Entity<Member>().Property(m => m.DateModified).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);


    }

我已经向成员实体添加了一个属性MemberId并尝试使用

context.Database.ExecuteSqlCommand("ALTER TABLE Members ADD MemberId INT IDENTITY(10000,1) PRIMARY KEY");

但我收到一条错误消息,表只能包含一个标识,但我没有设置任何IDENTITY,Id列自动IDENTITY？

解决方法

我找到了答案
here：

context.Database
    .ExecuteSqlCommand("ALTER TABLE Members ALTER COLUMN Id IDENTITY (10000,1)");