public class Product
{
    [Required(ErrorMessage = "名称是必填的")]
    [StringLength(100, MinimumLength = 2, ErrorMessage = "名称长度必须在2到100之间")]
    public string Name { get; set; }

    [Range(1, 1000, ErrorMessage = "价格必须在1到1000之间")]
    public decimal Price { get; set; }

    [EmailAddress(ErrorMessage = "邮箱格式不正确")]
    public string Email { get; set; }
}

[HttpPost]
public IActionResult Create([FromBody] Product product)
{
    if (!ModelState.IsValid)
    {
        return BadRequest(ModelState);
    }

    // 处理业务逻辑
    return CreatedAtAction(nameof(GetById), new { id = 1 }, product);
}

public class FutureDateAttribute : ValidationAttribute
{
    protected override ValidationResult IsValid(object value, ValidationContext validationContext)
    {
        if (value is DateTime date && date > DateTime.Now)
        {
            return ValidationResult.Success;
        }
        return new ValidationResult("日期必须是将来的时间。");
    }
}

public class Order
{
    [FutureDate]
    public DateTime DeliveryDate { get; set; }
}

// 在 Program.cs 或 Startup.cs 中
builder.Services.AddControllers(options =>
{
    options.Filters.Add(new ValidateModelAttribute());
});