server-side:
public class OneDigitAttribute : RegularExpressionAttribute, IClientValidatable
{
public OneDigitAttribute()
: base(@"^.*(?=.*\d).+$")
{
ErrorMessage = "Required at least one numeric digit";
}
// for supporting a client-side validation through jquery.validation.unobtrusive
public IEnumerable GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
yield return new ModelClientValidationRegexRule(this.ErrorMessage, this.Pattern)
{
ValidationType = "onedigit"
};
}
}
then, you can use the attribute
...
[OneDigit]
[DataType(DataType.Password)]
public string Password { get; set; }
....
client-side :
$.validator.addMethod("onedigit", function (value, element, regexp) {
var re = new RegExp(regexp); return re.test(value);
});
jQuery.validator.unobtrusive.adapters.addSingleVal("onedigit", "pattern");
