public class Customer{[StringLengthValidator(1, 25)]public string FirstName { get; set; }[StringLengthValidator(1, 25)]public string LastName { get; set; }[RegexValidator(@"^\d\d\d-\d\d-\d\d\d\d$")]public string SSN { get; set; }public Address Address { get; set; }}

  public class Address{[StringLengthValidator(1, 50)]public string StreetAddress { get; set; }[ValidatorComposition(CompositionType.And)][StringLengthValidator(1, 30)][ContainsCharactersValidator("sea", ContainsCharacters.All)]public string City { get; set; }[StringLengthValidator(2, 2)]public string State { get; set; }[RegexValidator(@"^\d{5}$")]public string ZipCode { get; set; }}

private Validator<Customer> customerValidator;private void MainForm_Load(object sender, EventArgs e){ValidatorFactory valFactory = EnterpriseLibraryContainer.Current.GetInstance<ValidatorFactory>();customerValidator = valFactory.CreateValidator<Customer>();}private void acceptButton_Click(object sender, EventArgs e){Customer customer = new Customer{FirstName = firstNameTextBox.Text,LastName = lastNameTextBox.Text,SSN = ssnTextBox.Text,Address = new Address{StreetAddress = streetAddressTextBox.Text,City = cityTextBox.Text,State = stateComboBox.Text,ZipCode = zipCodeTextBox.Text}};       ValidationResults results = customerValidator.Validate(customer);if (!results.IsValid){MessageBox.Show(this,"Customer is not valid","Error",MessageBoxButtons.OK,MessageBoxIcon.Error);return;}MessageBox.Show(this,"Processing customer '" + customer.FirstName + "'","Working",MessageBoxButtons.OK,MessageBoxIcon.Information);}

或

 if (!results.IsValid){StringBuilder builder = new StringBuilder();builder.AppendLine("Customer is not valid:");foreach (ValidationResult result in results){builder.AppendLine(string.Format("{0}: {1}", result.Key, result.Message));}MessageBox.Show(this,builder.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);return;}MessageBox.Show(this,"Processing customer '" + customer.FirstName + "'","Working",MessageBoxButtons.OK,MessageBoxIcon.Information);

　　或用资源文件

 [StringLengthValidator(1, 25, MessageTemplateResourceType = typeof(Resources), MessageTemplateResourceName = "FirstNameMessage")] public string FirstName { get; set; } [StringLengthValidator(1, 25, MessageTemplateResourceType = typeof(Resources), MessageTemplateResourceName = "LastNameMessage")] public string LastName { get; set; } [RegexValidator(@"^\d\d\d-\d\d-\d\d\d\d$", MessageTemplateResourceType = typeof(Resources), MessageTemplateResourceName = "SSNMessage")]