public void PopulateModel(List <ProductType> pt, string selectedBrand, string selectedColour, string selectedGender, string selectedSeason, string selectedStyle)
{
var allBrands = new Populate().PopulateAllBrands();
allBrands.Add("All", "All");
Brand = new EnumerableDropDownViewModel(allBrands, selectedBrand == "" ? "All" : selectedBrand);
Brand.Items = Brand.Items.OrderBy(t => t.Text).ToList();
var allColours = new Populate().PopulateAllColours();
allColours.Add("All", "All");
Colour = new EnumerableDropDownViewModel(allColours, selectedColour == "" ? "All" : selectedColour);
Colour.Items = Colour.Items.OrderBy(t => t.Text).ToList();
var g = new Populate().PopulateAllGenders();
g.Add("All", "All");
Gender = new EnumerableDropDownViewModel(g, selectedGender == "" ? "All" : selectedGender);
Gender.Items = Gender.Items.OrderBy(t => t.Text).ToList();
var allSeasons = new Populate().PopulateAllSeasons();
allSeasons.Add("All", "All");
Season = new EnumerableDropDownViewModel(allSeasons, selectedSeason == "" ? "All" : selectedSeason);
Season.Items = Season.Items.OrderBy(t => t.Text).ToList();
var allStyles = new Populate().PopulateAllStyles();
allStyles.Add("All", "All");
Style = new EnumerableDropDownViewModel(allStyles, selectedStyle == "" ? "All" : selectedStyle);
Style.Items = Style.Items.OrderBy(t => t.Text).ToList();
}