對于數(shù)值型的排序我們都已經(jīng)司空見慣了，但我們有時候希望我們的Sort()方法能夠給任何對象排序，比如某段客戶機(jī)代碼包含Currency結(jié)構(gòu)數(shù)組或其他的類和結(jié)構(gòu)，就需要對該數(shù)組排序。這里我們使用委托并封裝這個方法進(jìn)行比較。

排序我們還是使用經(jīng)典的冒泡排序，如果數(shù)據(jù)量較大你可以換為你自己的更高效的排序算法。

先給出整個代碼：

復(fù)制代碼代碼如下:

public class BubbleSorter
{
 public static void Sort(object[] sortArray, CompareOperation gtMethod)
 {
  for (int i = 0; i < sortArray.Length; i++)
  {
   for (int j = 0; j < sortArray.Length; j++)
   {
    if (gtMethod(sortArray[j], sortArray[i]))
    {
     object tmp = sortArray[i];
     sortArray[i] = sortArray[j];
     sortArray[j] = tmp;
    }
   }
  }
 }
}
public class Employee
{
 private string name;
 private decimal salary;
 public Employee(string name, decimal salary)
 {
  this.name = name;
  this.salary = salary;
 }
 public override string ToString()
 {
  return string.Format(name.PadRight(20) + "{0:C}", salary);
 }
 public static bool RSalaryIsGreater(object lObj, object rObj)
 {
  Employee lEmployee = lObj as Employee;
  Employee rEmployee = rObj as Employee;
  return rEmployee.salary > lEmployee.salary;
 }
}

再給一個調(diào)用示例：

復(fù)制代碼代碼如下:

public delegate bool CompareOperation(object lObj, object rObj);
class Program
{
 static void Main(string[] args)
 {
  Employee[] employees = 
  {
   new Employee("Tommy",20000),
   new Employee("Elmer",10000),
   new Employee("Daffy", 25000),
   new Employee("Wiley",1000000),
   new Employee("Foghorn",23000),
   new Employee("RoadRunner",50000),
  };
  CompareOperation employeeCompareOperation = new CompareOperation(Employee.RSalaryIsGreater);
  BubbleSorter.Sort(employees, employeeCompareOperation);
  for (int i = 0; i < employees.Length; i++)
  {
   Console.WriteLine(employees[i].ToString());
  }
 }
}