为什么在Asp.Net Identity 2.0 PhoneNumber是[nvarchar](max)

Question

我在我的MVC 5项目中使用Asp.Net Identity 2.0.

为什么列PhoneNumber使用[nvarchar](max)在SQL Server数据库中的表[dbo].[AspNetUsers]？

我可以将此更改为[nvarchar](64),例如？

Answer 1

我创建了一个类ApplicationUser : IdentityUser,我PhoneNumber用属性覆盖属性[MaxLength(64)].

public class ApplicationUser : IdentityUser
{
    [MaxLength(64)]
    public override string PhoneNumber { get; set; }

    public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
    {
        var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
        return userIdentity;
    }
}

Answer 2

您应该能够在ApplicationDbContext中使用modelBuilder指定自定义长度

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext()
        : base("DefaultConnection", throwIfV1Schema: false)
    {

    }

    static ApplicationDbContext()
    {
        // Set the database intializer which is run once during application start
        // This seeds the database with admin user credentials and admin role
        Database.SetInitializer<ApplicationDbContext>(new ApplicationDbInitializer());
    }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);

        modelBuilder.Properties<string>()
        .Where(x => x.Name == "PhoneNumber")
        .Configure(c => c.HasMaxLength(64));
    }

    public static ApplicationDbContext Create()
    {
        return new ApplicationDbContext();
    }
}

我已经对其进行了测试，并且可以正常工作！

有关操作EF6映射的更多信息，您可以查看以下链接：

http://msdn.microsoft.com/zh-CN/data/jj819164#classes