经典的委托排序

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：

 

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：

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());}}}