[Required]
[MinValue(50, "Number", "minimum value is 50")]
public int Number { get; set; }
Custom ValidationAttribute Code:
public class MinValueAttribute : System.ComponentModel.DataAnnotations.ValidationAttribute, System.Web.Mvc.IClientValidatable
{
private String PropertyName { get; set; }
private readonly int _minValue;
public MinValueAttribute(int minValue, String propertyName, String errormessage)
{
this._minValue = minValue;
this.PropertyName = propertyName;
this.ErrorMessage = errormessage;
}
public override bool IsValid(object value)
{
return (int)value >= _minValue;
}
}
Override the method GetClientValidationRules to add data-val attributes to html5 code.
public IEnumerable GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
var modelClientValidationRule = new ModelClientValidationRule
{
ValidationType = "minvalue",
ErrorMessage = this.ErrorMessage,
};
modelClientValidationRule.ValidationParameters.Add("minval", this._minValue);
yield return modelClientValidationRule;
}
Client Side code: add this code in files called minvalValidation.js $.validator.addMethod("minvalue", function (value, element, params) {
var minLength = $(element).attr("data-val-minvalue-minval");
if (value < minLength) {
var message = $(element).attr('data-val-minvalue');
$.validator.messages.minvalue = message;
return false;
}
return true;
});
$.validator.unobtrusive.adapters.add('minvalue', function (options) {
options.rules['minvalue'] = options.params;
if (options.message != null) {
$.validator.messages.minvalue = options.message;
}
});
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