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MVC: Exact string Custom Validation

Model Property

[Display(Name = "SchoolName CustomValidator(ValidName='MySchool')")]
[ExactString(ValidName = "MySchool", ErrorMessage = "The Input Name must exactly equal by Valid Name")]
public string SchoolName { get; set; }

Custom Validation class

public class ExactStringAttribute : ValidationAttribute ,IClientValidatable
    {
        public string ValidName { get; set; }

        public override bool IsValid(object value)
        {
            if (value != null)
                if (value.ToString() == ValidName)
                    return true;

            return false;
        }

        public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
        {
            var rule = new ModelClientValidationRule();
            rule.ErrorMessage = FormatErrorMessage(metadata.GetDisplayName());
            rule.ValidationParameters.Add("validname", ValidName);
            rule.ValidationType = "exactstring";
            yield return rule;
        }
    }

Add Jquery validate function

  <!-- Start : Register Exact String Validation -->
    <script>

        if ($.validator && $.validator.unobtrusive) {

            $.validator.unobtrusive.adapters.addSingleVal("exactstring", "validname");

            $.validator.addMethod("exactstring", function (value, element, validname) {
                if (value) {
                    if (value == validname) {
                        return true; /* success */
                    }
                }
                return false;
            });

        }
    </script>
    <!-- End : Register Exact String Validation -->
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