public override PropertyDescriptorCollection GetProperties()
{
if (_properties == null) {
// Get properties from our parent
var originalCollection = base.GetProperties();
// Set _properties to avoid a stack overflow when CreateProjectionProperties
// ends up recursively calling TypeDescriptor.GetProperties on a type.
_properties = originalCollection;
var customDescriptorsCreated = false;
var tempPropertyDescriptors = new List<PropertyDescriptor>();
// for every property exposed by our parent, see if we have additional metadata to add,
// and if we do we need to add a wrapper PropertyDescriptor to add the new attributes
foreach (var propDescriptor in _properties.OfType<PropertyDescriptor>()) {
var newMetadata = GetAdditionalAttributes(propDescriptor);
if (newMetadata.Length > 0) {
tempPropertyDescriptors.Add(new DataControllerPropertyDescriptor(propDescriptor, newMetadata));
customDescriptorsCreated = true;
}
else
tempPropertyDescriptors.Add(propDescriptor);
}
if (customDescriptorsCreated)
_properties = new PropertyDescriptorCollection(tempPropertyDescriptors.ToArray(), true);
}
return _properties;
}
private PropertyDescriptorCollection FilterProperties(PropertyDescriptorCollection originalCollection)
{
// Create an enumerator containing only the properties that are not in the provided list of property names
// and fill an array with those selected properties
IEnumerable<PropertyDescriptor> selectedProperties = originalCollection.OfType<PropertyDescriptor>().Where(p => !_excludeBrowsableProperties.Contains(p.Name));
PropertyDescriptor[] descriptors = selectedProperties.ToArray();
// Return a PropertyDescriptorCollection containing only the filtered descriptors
PropertyDescriptorCollection newCollection = new PropertyDescriptorCollection(descriptors);
return newCollection;
}
private void InitializeColumns(PropertyDescriptorCollection columnDescriptors) {
_columns = columnDescriptors.OfType<PropertyDescriptor>().Select(p => new SimpleColumnProvider(this, p)).OfType<ColumnProvider>().ToList();
}
