// 具体请求处理方法
public override void ProcessRequest(PurchaseRequest request)
{
if (request.Amount < 80000)
{
// 处理请求
Console.WriteLine("经理 {0} 审批采购单：{1}，金额：{2} 元，采购目的：{3}。",
this.name, request.Number, request.Amount, request.Purpose);
}
else
{
this.successor.ProcessRequest(request);
}
}
// 递交采购单给审批者
public void SendRequestToApprover(PurchaseRequest request)
{
if (request.Amount < 5000) // 主任可审批该采购单
{
HandleByDirector(request);
}
else if (request.Amount < 100000) // 副董事长可审批该采购单
{
HandleByVicePresident(request);
}
else if (request.Amount < 500000) // 董事长可审批该采购单
{
HandleByPresident(request);
}
else
{
HandleByCongress(request); // 董事会可审批该采购单
}
}
public static void Main(string[] args)
{
// 创建职责链
Approver andy = new Director("Andy");
Approver jacky = new Manager("Jacky");
Approver ashin = new VicePresident("Ashin");
Approver anya = new President("Anya");
Approver meeting = new Congress("Congress");
andy.SetSuccessor(jacky);
jacky.SetSuccessor(ashin);
ashin.SetSuccessor(anya);
anya.SetSuccessor(meeting);
// 构造采购请求单并发送审批请求
PurchaseRequest request1 = new PurchaseRequest(45000.00,
"MANULIFE201706001",
"购买PC和显示器");
andy.ProcessRequest(request1);
PurchaseRequest request2 = new PurchaseRequest(60000.00,
"MANULIFE201706002",
"2017开发团队活动");
andy.ProcessRequest(request2);
PurchaseRequest request3 = new PurchaseRequest(160000.00,
"MANULIFE201706003",
"2017公司年度旅游");
andy.ProcessRequest(request3);
PurchaseRequest request4 = new PurchaseRequest(800000.00,
"MANULIFE201706004",
"租用新临时办公楼");
andy.ProcessRequest(request4);
Console.ReadKey();
}
public static void InitializeDemo(PurchaseRequest request)
{
PurchaseRequestHandler requestHandler = new PurchaseRequestHandler();
requestHandler.SendRequestToApprover(request);
}
// 抽象请求处理方法 public abstract void ProcessRequest(PurchaseRequest request);
// 具体请求处理方法
public override void ProcessRequest(PurchaseRequest request)
{
// 处理请求
Console.WriteLine("董事会 {0} 审批采购单：{1}，金额：{2} 元，采购目的：{3}。",
this.name, request.Number, request.Amount, request.Purpose);
}
// 董事会审批采购单
private void HandleByCongress(PurchaseRequest request)
{
// 代码省略
}
// 董事长审批采购单
private void HandleByPresident(PurchaseRequest request)
{
// 代码省略
}
// 主管审批采购单
private void HandleByDirector(PurchaseRequest request)
{
// 代码省略
}