public void AddFilter(String propertyName, Control control, List <Object> rangeOfValues = null)
{
if (_filters.ContainsKey(propertyName))
{
_filters[propertyName].AddControl(control, rangeOfValues);
}
else
{
var f = new Filter(propertyName);
f.CLV = this;
f.AddControl(control, rangeOfValues);
_filters[propertyName] = f;
}
}
