//Event Triggered by Inner Category ComboBox on "SelectionChange"
//REFINES the Base Category Search by Inner Category,
//in othe words searches For the Items form base Category by Inner Category
private void SearchInnerByBase(object sender, SelectionChangedEventArgs e)
{
//Base Category choosed by the User
var eBase = cmbBaseCategory.SelectedItem;
//Inner Category Choosed by the User
var eInner = cmbInnerCategory.SelectedItem;
//If we are in the Regular Search Mode
//and there's valid data in the Base and Inner
//Categories ComboBoxes
if (eBase != null && eInner != null && !IsMultiSearch)
{
//Refine the search from Base Category by Inner Category
//and display the results in the DataGrid
dataLib.ItemsSource =
mainLibrary.FindInnerByBaseCategory((eBaseCategory)eBase, (eInnerCategory)eInner);
}
else if (IsMultiSearch)
{
//Make Multiply Search by numerous parameters
//including search form Base Category,
//which was refined by Inner Category
MultipleSearch();
}
}