int IComparer.Compare(object a, object b)
{
car c1 = (car)a;
car c2 = (car)b;
return(String.Compare(c2.make, c1.make));
}
public void SampleCode()
{
// Create an array of car objects.
car[] arrayOfCars = new car[6]
{
new car("Ford", 1992),
new car("Fiat", 1988),
new car("Buick", 1932),
new car("Ford", 1932),
new car("Dodge", 1999),
new car("Honda", 1977)
};
// Write out a header for the output.
Console.WriteLine("Array - Unsorted\n");
foreach (car c in arrayOfCars)
{
Console.WriteLine(c.Make + "\t\t" + c.Year);
}
// Demo IComparable by sorting array with "default" sort order.
Array.Sort(arrayOfCars);
Console.WriteLine("\nArray - Sorted by Make (Ascending - IComparable)\n");
foreach (car c in arrayOfCars)
{
Console.WriteLine(c.Make + "\t\t" + c.Year);
}
// Demo ascending sort of numeric value with IComparer.
Array.Sort(arrayOfCars, car.sortYearAscending());
Console.WriteLine("\nArray - Sorted by Year (Ascending - IComparer)\n");
foreach (car c in arrayOfCars)
{
Console.WriteLine(c.Make + "\t\t" + c.Year);
}
// Demo descending sort of string value with IComparer.
Array.Sort(arrayOfCars, car.sortMakeDescending());
Console.WriteLine("\nArray - Sorted by Make (Descending - IComparer)\n");
foreach (car c in arrayOfCars)
{
Console.WriteLine(c.Make + "\t\t" + c.Year);
}
// Demo descending sort of numeric value using IComparer.
Array.Sort(arrayOfCars, car.sortYearDescending());
Console.WriteLine("\nArray - Sorted by Year (Descending - IComparer)\n");
foreach (car c in arrayOfCars)
{
Console.WriteLine(c.Make + "\t\t" + c.Year);
}
Console.ReadLine();
}
int IComparer.Compare(object a, object b)
{
car c1 = (car)a;
car c2 = (car)b;
if (c1.year < c2.year)
{
return(1);
}
if (c1.year > c2.year)
{
return(-1);
}
else
{
return(0);
}
}
// Implement IComparable CompareTo to provide default sort order.
int IComparable.CompareTo(object obj)
{
car c = (car)obj;
return(String.Compare(this.make, c.make));
}