protected virtual async Task UpdateProperty(IValueProvider valueProvider, T entity, IPropertyMetadata property)
{
bool handled = false;
bool hasValue = valueProvider.Keys.Contains(property.ClrName);
object value;
if (hasValue)
{
if (property.IsFileUpload)
{
value = valueProvider.GetValue <ISelectedFile>(property.ClrName);
}
else if (property.Type == CustomDataType.Password)
{
value = valueProvider.GetValue <string>(property.ClrName);
}
else
{
value = valueProvider.GetValue(property.ClrName, property.ClrType);
}
if (EntityPropertyUpdate != null)
{
var arg = new EntityPropertyUpdateEventArgs <T>(entity, valueProvider, property, value);
await EntityPropertyUpdate(Context, arg);
handled = arg.IsHandled;
}
}
else
{
value = property.GetValue(entity);
}
if (!handled)
{
if (value != null && !property.ClrType.IsAssignableFrom(value.GetType()))
{
throw new NotImplementedException("未处理的属性“" + property.Name + "”。");
}
ValidationContext validationContext = new ValidationContext(entity, Context.DomainContext, null);
validationContext.MemberName = property.ClrName;
validationContext.DisplayName = property.Name;
var error = property.GetAttributes <ValidationAttribute>().Select(t => t.GetValidationResult(value, validationContext)).Where(t => t != ValidationResult.Success).ToArray();
if (error.Length > 0)
{
throw new ArgumentException(string.Join("，", error.Select(t => t.ErrorMessage)));
}
if (hasValue)
{
property.SetValue(entity, value);
}
}
}
public IEnumerable <ValidationResult> Validate(IEntity entity, IEnumerable <IElement> relatedElements, IServiceProvider serviceProvider)
{
var validationAttributes = _property.GetAttributes <RelationValidationAttribute>();
var validationContext = new ValidationContext(entity, serviceProvider, default)
{
MemberName = _property.PropertyName
};
return(validationAttributes
.Select(attr => attr.IsValid(entity, relatedElements, validationContext))
.SelectNotNull(result => result as ValidationResult));
}
}