using System.ComponentModel.DataAnnotations; namespace Apimanager_backend.Dtos { public class CreateUserDto { [Required(ErrorMessage = "用户名必填")] [MaxLength(20,ErrorMessage = "用户名最大长度20字符")] public string Username { get; set; } [Required(ErrorMessage = "密码必填")] public string Password { get; set; } [EmailAddress(ErrorMessage = "邮箱格式错误")] public string Email { get; set; } } }