#nullable enable using System.ComponentModel.DataAnnotations; namespace YD_Event.Application.Common.Dtos; public class SendVerificationCodeInput { [Required(ErrorMessage = "手机号不能为空")] [RegularExpression(@"^1[3456789]\d{9}$", ErrorMessage = "手机号格式不正确")] public string Phone { get; set; } = null!; }