public virtual Tuple <int[], string[], string[]> Execute(int?filteredToYear = null, string filteredByMake = null)
{
int[] years = _manufacturerRepository.GetYears();
string[] makes = null;
string[] models = null;
if ((years != null) && (years.Length > 0))
{
// If the user specified a year, then look up the makes.
// Otherwise, use the makes from the first year in the list.
int selectedYear = -1;
if ((filteredToYear != null) &&
(_manufacturerRepository.IsValidYear(filteredToYear.Value)))
{
selectedYear = filteredToYear.Value;
}
makes = _manufacturerRepository.GetMakes(selectedYear);
// if the user specified a year and a make, then look up the models.
if ((makes != null) && (makes.Length > 0))
{
string selectedMake = string.Empty;
if ((!string.IsNullOrEmpty(filteredByMake)) &&
(_manufacturerRepository.IsValidMake(selectedYear, filteredByMake)))
{
selectedMake = filteredByMake;
}
models = _manufacturerRepository.GetModels(selectedYear, selectedMake);
}
}
if (years == null)
{
years = new int[] {};
}
if (makes == null)
{
makes = new string[] {};
}
if (models == null)
{
models = new string[] {};
}
return(new Tuple <int[], string[], string[]>(years, makes, models));
}
