private static bool TryGetConvertedValue(Property property, string value, IList<ValidationResult> errors, out object convertedValue)
{
convertedValue = null;
try
{
convertedValue = property.ConvertFromBindableValue(value);
return true;
}
catch (Exception ex)
{
errors.Add(new PropertyValidationResult(property, ex.Message));
}
return false;
}
/// <summary>
/// Validates a <see cref="ElementReferenceProperty"/>.
/// </summary>
/// <remarks>
/// If the <paramref name="property"/> is required and <paramref name="value"/> is empty, the method reports a validation error.<br/>
/// If the value cannot be resolved, the method reports a validation warning.<br/>
/// </remarks>
/// <param name="property">The <see cref="ElementReferenceProperty"/> that should be validated.</param>
/// <param name="value">The value used for validation.</param>
/// <param name="results">The collection to wich any results that occur during the validation can be added.</param>
protected override void ValidateCore(Property property, string value, IList<ValidationResult> results)
{
var referenceProperty = property as ElementReferenceProperty;
if (referenceProperty == null) return;
var convertedValue = property.ConvertFromBindableValue(value) as string;
bool isMissingRequiredReference = string.IsNullOrEmpty(convertedValue) && property.IsRequired;
if (isMissingRequiredReference || !property.SuggestedValues.Contains(convertedValue))
{
results.Add(new
PropertyValidationResult(
property,
GetMissingReferenceMessage(referenceProperty),
true));
}
}
