int [] ly={1,4,5,6,78,2,3}
Array.sotr(ly);
輸出結果：1,2,3,4,5,6,78
sort()方法，派生自IComparer接口。如果是泛型類數組如何排序呢？
public class Person
{
public string firstName{set;get;}
public string lastName{set;get;}
}
public Enum PersonType{ firstName,lastName}
public class PersonComparer : IComparer<Person>
{
PersonType pt;
public PersonComparer(PersonType p){pt=p;}
public int Comparer(Person a,Person b)
switch(pt)
{
case PersonType.firstName:
return a.firstName.CompareTo(b.firstName);
case PersonType.lastName:
return a.lastName.CompareTo(b.lastName);
default:
throw new Exception("Error!");
}
}
用方法測試下：
Person [] pl={new Person(){firstName="g",lastName=""},
new Person(){firstName="s",lastName=""},
new Person(){firstName="d",lastName=""},
new Person(){firstName="v",lastName=""},
new Person(){firstName="c",lastName=""}
}
Array.sort( pl , new PersonComparer(PersonType.firstName) );
輸出結果：c , d ,g ,s,v