C# HashTable的一个例子.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections.Specialized;
using System.Collections;
namespace ConsoleApplication1 //这个小程序是关于hashtable的，自己感觉就是相当于属性。
{
public class Employeedata //一个员工数据类
{
private string name;
private decimal salary;
private EmployeeID id;
public Employeedata()
{
}
public Employeedata(EmployeeID id,string name,decimal salary)
{
this.id = id;
this.name = name;
this.salary = salary;
}
public override string ToString()
{
StringBuilder sb = new StringBuilder(id.ToString(), 100);
sb.Append(":");
sb.Append(string.Format("{0,-20}{1:c}",name,salary));
return sb.ToString();
}
}
public class EmployeeID //员工ID 类
{
private string iD;
public string ID
{
get { return iD; }
set { iD = value; }
}
public EmployeeID(string id)
{
this.iD = id;
}
public override string ToString()
{
return iD.ToString();
}
}
public class TestHarness
{
public Hashtable employeses = new Hashtable(53);
public void Run()
{
EmployeeID id1=new EmployeeID("2050");
EmployeeID id2=new EmployeeID("24210");
Employeedata myEmployee01 = new Employeedata(id1, "张三", 12613213.44m);
Employeedata myEmployee02= new Employeedata(id2, "李四", 145672228883.44m);
employeses.Add(id1, myEmployee01);
employeses.Add(id2, myEmployee02);
while (true)
{
try
{
Console.WriteLine("Enter employee ID(格式:0-9,'X'退出!):");
string userInput=Console.ReadLine();
userInput=userInput.ToUpper();
if(userInput=="X")
return;
EmployeeID id=new EmployeeID(userInput);
DisplayData(id);
}
catch (Exception e)
{
Console.WriteLine("Exception occurred.Did you use the correct format for the employee ID?");
Console.WriteLine(e.Message);
Console.WriteLine();
}
Console.WriteLine();
}
}
public void DisplayData(EmployeeID id)
{
//Console.WriteLine(id.ToString());
object emObj = employeses[id];
if (emObj != null)
{
Employeedata employeeTemp = (Employeedata)emObj;
Console.WriteLine("Employee:" + employeeTemp.ToString());
}
else
{
Console.WriteLine("Employee not found:ID = "+id.ToString());
}
}
}
class Program
{
static void Main(string[] args)
{
TestHarness test = new TestHarness(); //在这里本来是打算用foreach的，但是不知道杂的用不了，要用foreach 还是用ArrayList吧。
test.Run();
}
}
}