/// <summary>
/// Validates the specified property using data annotation attributes.
/// </summary>
/// <param name="propertyName">The name of the property.</param>
/// <returns>
/// <see langword="true"/> if the property is valid; otherwise, <see langword="false"/> if
/// it has errors.
/// </returns>
public bool ValidateProperty(string propertyName)
{
if (string.IsNullOrEmpty(propertyName))
{
throw new ArgumentNullException(nameof(propertyName));
}
var propertyInfo = GetType().GetRuntimeProperty(propertyName);
if (propertyInfo == null)
{
throw new ArgumentException("Invalid property name", propertyName);
}
if (!propertyInfo.GetCustomAttributes(typeof(ValidationAttribute)).Any())
{
return(true);
}
var errors = new List <string>();
bool isValid = TryValidateProperty(propertyInfo, errors);
ErrorsContainer.SetErrors(propertyInfo.Name, errors);
return(isValid);
}
/// <summary>
/// Initializes a new instance of the <see cref="ValidatableObservableObject"/> class.
/// </summary>
public ValidatableObservableObject()
{
ErrorsContainer = new ErrorsContainer(propertyName =>
{
OnErrorsChanged(new DataErrorsChangedEventArgs(propertyName));
OnPropertyChanged(new PropertyChangedEventArgs(HasErrorsPropertyName));
});
}
/// <summary>
/// Validates all properties using data annotation attributes.
/// </summary>
/// <returns>
/// <see langword="true"/> if all properties are valid; otherwise, <see langword="false"/>
/// if it has errors.
/// </returns>
/// <remarks>
/// This method does not check for entity-level errors. It only validates properties using
/// data annotation attributes.
/// </remarks>
public bool ValidateProperties()
{
// Get all the properties decorated with the ValidationAttribute.
var propertiesToValidate = GetType().GetRuntimeProperties()
.Where(c => c.GetCustomAttributes(typeof(ValidationAttribute)).Any());
bool isValid = true;
var errors = new List <string>();
foreach (var propertyInfo in propertiesToValidate)
{
errors.Clear();
isValid &= TryValidateProperty(propertyInfo, errors);
ErrorsContainer.SetErrors(propertyInfo.Name, errors);
}
return(isValid);
}
/// <summary>
/// Gets the validation errors for a specified property or for the entire object.
/// </summary>
/// <param name="propertyName">
/// The name of the property to retrieve validation errors for; or <see langword="null"/> or
/// <see cref="string.Empty"/> to retrieve entity-level errors.
/// </param>
/// <returns>The validation errors for the property or object.</returns>
public IEnumerable GetErrors(string propertyName)
{
return(ErrorsContainer.GetErrors(propertyName));
}
public Dictionary <string, List <string> > GetAllErrors()
{
return(ErrorsContainer.GetAllErrors());
}