asp.net mvc Model Valid

1、自带验证

• 非空

[Require]

• 字符串长度

//长度6-100
 [StringLength(100, MinimumLength = 6)]

• 数据类型

[DataType(DataType.Password)]

• 正则表达式

 [RegularExpression(@"[A-Za-z0-9._%+-]+@[A-Za-z0-9._]+\.[A-Za-z]{2,4}")]

• 相同验证

public string Password { get; set; }
[Compare("Password", ErrorMessage = "密码和确认密码不匹配。")]
public string ConfirmPassword { get; set; }

• 数值范围

 [Range(13, 18)]

• 远程验证

        //Model
        [Required]
        [Display(Name = "用户名")]
        [Remote("CheckUserName","Account")]
        public string UserName { get; set; }
        //control
        public JsonResult CheckUserName(string userName)
        {
            var result = userName == "admin";
            return Json(result, JsonRequestBehavior.AllowGet);
        }

2、自定义验证

2.1 继承ValidationAttribute（全局都可以使用）

public class MyMaxLengthAttribute : ValidationAttribute
    {
        private readonly int MaxLength;
 
        public MyMaxLengthAttribute(int maxLength)
        {
            MaxLength = maxLength;
        }
 
        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            string content = value.ToString();
            if (content.Length > MaxLength)
            {
                return new ValidationResult("输入的字符太多了！^_^");
            }
            return ValidationResult.Success;
            //return base.IsValid(value, validationContext);
        }

2.2 Model类实现接口IValidatableObject（限于该Model类使用，但可以很方便地对该Model的所以属性进行验证）

   public IEnumerable<ValidationResult> Validate(ValidationContext validationContent)
        {
            if (Password != ConfirmPassword)
            {
                yield return new ValidationResult("两次输入的密码不同！", new[] { "Password" });
            }
        }