// realize the 'handleDonate() method'
public override string handleDonate(Donation donate)
{
string procResult = "";
if (donate.type == DonateType.人民團體)
{
if (donate.money <= 500000)
{
procResult = "Handle Donation by #" + this.GetType().Name + "\n";
}
else
throw new DonateExceedException("人民團體捐贈政治獻金不得超過法定限額：五十萬");
}
else
{
// 如果有下一個鏈結的 Hanlder，交給它處理
if (this.Successor != null)
procResult = Successor.handleDonate(donate);
else
{
throw new NullHanderException("沒有 Handler 處理這個 Donation !\n" +
"原因：" + donate.ext_info);
}
}
return procResult;
}
public ActionResult handleDonate(string TxtName, string SelDonateType, string TxtDonateMoney, string TxtExtInfo)
{
procDonateControl control = new procDonateControl(); // new a domain controller
Donation donate = new Donation(); // new a Donation DTO Class.
DonateType dtype;
switch (SelDonateType)
{
case ("個人") :
dtype = DonateType.個人;
break;
case ("營利事業"):
dtype = DonateType.營利事業;
break;
case ("人民團體"):
dtype = DonateType.人民團體;
break;
default :
dtype = DonateType.UNKNOWN;
break;
}
// put the form's values into donate instance.
donate.name = TxtName;
donate.type = dtype;
donate.money = Convert.ToInt32(TxtDonateMoney);
donate.ext_info = TxtExtInfo;
// get the process result.
ViewData["ProcssResult"] = control.procDonation(donate);
return View("Index");
}
public string procDonation(Donation donate)
{
string procResult = "";
DonateHandler handler;
handler = this.SetupHandlers(); // Setup all the donation handlers and return the first hander.
try
{
procResult = handler.handleDonate(donate);
}
catch (DonateExceedException de)
{
procResult = de.Message;
}
catch (NullHanderException ne)
{
procResult = ne.Message;
}
return procResult;
}
public abstract string handleDonate(Donation donate); // abstract method, 關於捐贈的邏輯處理，由 extend 的 Handler 實現