/// <summary>
/// Validates the specified property of the specified validation source.
/// </summary>
/// <param name="validationSource">The validation source.</param>
/// <param name="propertyName">Name of the property.</param>
/// <returns>The collection of validation mesasges.</returns>
public static ValidationMessageCollection Validate(this IValidatable validationSource, string propertyName)
{
validationSource.CannotBeNull();
propertyName.CannotBeNullOrEmpty();
ValidationMessageCollection messages = new ValidationMessageCollection();
List <string> validationContexts;
object propertyValue;
// get property value
var properties = ReflectionExtensions.GetProperties(validationSource.GetType());
if (properties.TryGetValue(propertyName, out PropertyData propertyData))
{
if (propertyData.PropertyInfo.CanRead &&
propertyData.PropertyInfo.CanWrite)
{
propertyValue = propertyData.PropertyInfo.GetValue(validationSource);
// get validation context
validationContexts = new List <string>();
validationContexts.Add(ValidationContext.Default); // always add the default validation context
validationContexts.AddRange(validationSource.GetActiveValidationContexts() ?? Array.Empty <string>()); // add currently active validation context
foreach (var validationContext in validationContexts.Distinct())
{
messages.AddRange(validationSource.Validate(propertyName, propertyValue, validationContext));
}
}
}
return(messages);
}