using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel.DataAnnotations;
using System.Text.RegularExpressions;
using System.Globalization;

namespace EMIS.ViewModel
{
    public sealed class EmailAttribute : ValidationAttribute
    {
        public const string reg = @"^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]+$";

        /// <summary>
        /// 
        /// </summary>
        public EmailAttribute()
        {
            this.ErrorMessage = "邮箱格式不正确";
        }

        /// <summary>
        /// 重写基类方法
        /// </summary>
        /// <param name="value"></param>
        /// <returns></returns>
        public override bool IsValid(object value)
        {
            if (value == null)
                return true;

            if (value is string)
            {
                Regex regEx = new Regex(reg);
                return regEx.IsMatch(value.ToString());
            }
            return false;
        }

    }
}