Fill list controls from episerver custom property settings

SetSelectedMultipleItemPropertyValues.cs

        protected void SetSelectedMultipleItemPropertyValues(string propertyName, ListControl control)
        {
            var listValues = EditModel[propertyName] == null ? new List<string>() 
		: EditModel[propertyName].ToString().Split(',').ToList();

            foreach (var option in GetMultipleOptionsListItemsForProperty(propertyName).ListOptions)
            {
                var newItem = new ListItem(option.Key, option.Value);
                if (!control.Items.Contains(newItem))
                        control.Items.Add(newItem);
            }

            for (int i = 0; i < control.Items.Count; i++)
            {
                if (listValues.Contains(control.Items[i].Value))
                    control.Items[i].Selected = true;
            }
        }

        private MultipleOptionsListSettings GetMultipleOptionsListItemsForProperty(string propertyName)
        {
            IPropertySettingsRepository settingsRepository = new PropertySettingsRepository();
            PropertySettingsContainer container;

            if (settingsRepository.TryGetContainer(EditModel.Property[propertyName].SettingsID, out container))
            {
                var wrapper = new PropertySettingsWrapper();
                foreach (PropertySettingsWrapper wrap in container.Settings.Values)
                {
                    if (wrap.PropertySettings.GetType() == typeof(MultipleOptionsListSettings))
                    {
                        wrapper = wrap;
                        break;
                    }
                }
                return wrapper.PropertySettings as MultipleOptionsListSettings;
            }
            return null;
        }