ASP.NET MVC uses DataAnnotations attributes to implement validations. DataAnnotations includes built-in validation attributes for different validation rules, which can be applied to the properties of model class. ASP.NET MVC framework will automatically enforce these validation rules and display validation messages in the view
The following table lists DataAnnotations validation attributes.
| Attribute | Description |
|---|---|
| Required | Indicates that the property is a required field |
| StringLength | Defines a maximum length for string field |
| CreditCard | Specifies that the specified field is a credit card number |
| Phone | Specifies that the field is a phone number using regular expression for phone numbers |
| MinLength | Specifies minimum length for a string field |
| MaxLength | Specifies maximum length for a string field |
| FileExtension | Validates with file extension |
| EmailAddress | Validates with email address format |
| CustomValidation | Specified custom validation method to validate the field |
| RegularExpression | Specifies that the field value must match with specified Regular Expression |
| Range | Defines a maximum and minimum value for a numeric field |
DataAnnotations attributes included can be used with namespace
public int id { get; set; }
[Required(ErrorMessage=”Name is required ?“)]
public string name { get; set; }
[Required(ErrorMessage=”Password Required ?“)]
[StringLength(50,ErrorMessage=”password are 10 char ?“,MinimumLength=7)]
[Display(Name=”password“)]
[DataType(DataType.Password)]
public string password { get; set; }
[Required(ErrorMessage = “Password Required ?“)]
[StringLength(50, ErrorMessage = “password 10 char“, MinimumLength = 7)]
[Compare(“password“,ErrorMessage=”pasword not match try again ?“)]
public string cpassword { get; set; }
public string gender { get; set; }
public string subject { get; set; }
[Required(ErrorMessage = “Nomber is required ?“)]
[StringLength(50, ErrorMessage = “password r 10 char“, MinimumLength = 10)]
public string number { get; set; }
[Required(ErrorMessage = “Please Enter Email Address“)]
[RegularExpression(“.+@.+\\..+”, ErrorMessage = “Please Enter Correct Email Addres“)]
public string email { get; set; }
public string city { get; set; }
View Validation result with razor view
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