Here’s an alternative to the opt-in attribute approach. I believe this will traverse the object-graph properly and validate everything.
public bool TryValidateObjectRecursive<T>(T obj, List<ValidationResult> results) {
bool result = TryValidateObject(obj, results);
var properties = obj.GetType().GetProperties().Where(prop => prop.CanRead
&& !prop.GetCustomAttributes(typeof(SkipRecursiveValidation), false).Any()
&& prop.GetIndexParameters().Length == 0).ToList();
foreach (var property in properties)
{
if (property.PropertyType == typeof(string) || property.PropertyType.IsValueType) continue;
var value = obj.GetPropertyValue(property.Name);
if (value == null) continue;
var asEnumerable = value as IEnumerable;
if (asEnumerable != null)
{
foreach (var enumObj in asEnumerable)
{
var nestedResults = new List<ValidationResult>();
if (!TryValidateObjectRecursive(enumObj, nestedResults))
{
result = false;
foreach (var validationResult in nestedResults)
{
PropertyInfo property1 = property;
results.Add(new ValidationResult(validationResult.ErrorMessage, validationResult.MemberNames.Select(x => property1.Name + '.' + x)));
}
};
}
}
else
{
var nestedResults = new List<ValidationResult>();
if (!TryValidateObjectRecursive(value, nestedResults))
{
result = false;
foreach (var validationResult in nestedResults)
{
PropertyInfo property1 = property;
results.Add(new ValidationResult(validationResult.ErrorMessage, validationResult.MemberNames.Select(x => property1.Name + '.' + x)));
}
}
}
}
return result;
}
Most up-to-date code:
https://github.com/reustmd/DataAnnotationsValidatorRecursive
Package:
https://www.nuget.org/packages/DataAnnotationsValidator/
Also, I have updated this solution to handle cyclical object graphs. Thanks for the feedback.