/// <summary>
/// Reads new values entered by the user for the field
/// </summary>
/// <param name="control">Parent control that controls were added to in the CreateEditControl() method</param>
/// <param name="configurationValues">The configuration values.</param>
/// <returns></returns>
public override string GetEditValue( Control control, Dictionary<string, ConfigurationValue> configurationValues )
{
var picker = control as CategoryPicker;
string result = null;
if ( picker != null )
{
var guids = new List<Guid>();
var ids = picker.SelectedValuesAsInt();
var categories = new CategoryService( new RockContext() ).Queryable().Where( c => ids.Contains( c.Id ) );
if ( categories.Any() )
{
guids = categories.Select( c => c.Guid ).ToList();
}
result = string.Join( ",", guids );
}
return result;
}