对于数值型的排序我们都已经司空见惯了，但我们有时候希望我们的Sort()方法能够给任何对象排序，比如某段客户机代码包含Currency结构数组或其他的类和结构，就需要对该数组排序。这里我们使用委托并封装这个方法进行比较。

排序我们还是使用经典的冒泡排序，如果数据量较大你可以换为你自己的更高效的排序算法。

先给出整个代码：

复制代码 代码如下:

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;

}

}

再给一个调用示例：

复制代码 代码如下:

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());

}

}

}