是否可以在EntityFramework 6中以特定步长自动递增ID？

Add-Migration CustomIdSequence

public partial class CustomIdSequence : DbMigration
{
    public override void Up()
    {
        // 设置新的步长值
        Sql("ALTER TABLE YourTableName ALTER COLUMN Id INT IDENTITY(1,10)");
    }

    public override void Down()
    {
        // 恢复默认步长值
        Sql("ALTER TABLE YourTableName ALTER COLUMN Id INT IDENTITY(1,1)");
    }
}

Update-Database

public class YourDbContext : DbContext
{
    public DbSet<YourEntity> YourEntities { get; set; }

    public override int SaveChanges()
    {
        var entries = ChangeTracker.Entries().Where(e => e.Entity is YourEntity && (e.State == EntityState.Added || e.State == EntityState.Modified));

        foreach (var entry in entries)
        {
            if (entry.Entity is YourEntity entity)
            {
                // 自定义ID生成逻辑
                if (entry.State == EntityState.Added)
                {
                    var currentMaxId = YourEntities.Max(e => e.Id) ?? 0;
                    entity.Id = currentMaxId + 10; // 设置步长为10
                }
            }
        }

        return base.SaveChanges();
    }
}