buttondelegater.cs

是一个模拟ATM的程序

// Menu.cs created with MonoDevelop
// User: Estelle at 2:29 PM 5/5/2008
//
// To change standard headers go to Edit->Preferences->Coding->Standard Headers
//

using System;
using System.Collections;
using System.Reflection;
using System.Windows.Forms;

namespace ATM{
	/**
	 * This interface is an abstraction of all the button events.
	 * It is useful for bind the delegater by using the reflection.
	 * The Names of each implemented class are relatively with Label of the binding button.
	 */
	public interface IButtonDelegater{
		void Execute(object obj,EventArgs er);
	}
	
	public delegate void DoJob(ATMForm atm);
	
	public class GotoPage:IButtonDelegater{
		public void Execute(object obj,EventArgs er){
			Button btn=(Button)obj;
			ATMForm atm=(ATMForm)btn.GetContainerControl();
			atm.showPage(btn.Name);
		}
	}
	
	public class Login:IButtonDelegater{
		public void Execute(object obj,EventArgs er){
			Button btn=(Button)obj;
			ATMForm atm=(ATMForm)btn.GetContainerControl();
			ArrayList controls=atm.getControls(ATMForm.LOGIN_PAGE);
			Bank.current=(Bank)(((ComboBox)controls[1]).SelectedItem);
			string bank=Bank.current.shortName.Trim();
			string cardno=((TextBox)controls[3]).Text.Trim();
			string newpwd=((TextBox)controls[5]).Text.Trim();
			try{
				if (cardno.Length==0)
					throw new ATMException("The Card Number should not be empty!");
				
				if (newpwd.Length==0)
					throw new ATMException("The Password should not be empty!");
				
				CustomerBalance cb=new CustomerBalance();
				cb.cardNo=cardno;
				ArrayList al=cb.getEntitiesByProperty("cardNo");
				bool exist=false;
				foreach(Object o in al){
					cb=(CustomerBalance)o;
					if (cb.cardType.Equals(bank)){
						exist=true;
						break;
					}
				}
				if (!exist)	throw new ATMException("Customer Not Found!");
				CustomerLogin cl=new CustomerLogin();
				cl.IDNo=cb.IDNo;
				cl=(CustomerLogin)cl.getEntityByID();
				if (cl.password.Equals(newpwd)){
					Customer c=new Customer();
					c.IDNo=cl.IDNo;
					c=(Customer)c.getEntityByID();
					string info="Are your name is "+c.realName;
					string yes=MessageBox.Show(info,"ATM",MessageBoxButtons.YesNo).ToString();
					if (yes.Equals("Yes")){
						atm.customer=c;
						atm.updateBalance();
						atm.showPage(ATMForm.OPERATION_PAGE);
					}else{
						atm.returnPage();
					}
				}else{
					throw new ATMException("Password Error!");
				}
			}catch(ATMException ae){
				MessageBox.Show(ae.Message,"ATM Error");
			}
		}
	}
	
	public class Submit:IButtonDelegater{
		public void Execute(object obj,EventArgs er){
			DoJob doJob=null;
			Button btn=(Button)obj;
			ATMForm atm=(ATMForm)btn.GetContainerControl();
			String page=atm.getCurrentPage();
			if (page.Equals(ATMForm.REGISTER_PAGE)){
				doJob=new DoJob(register);
			}else if (page.Equals(ATMForm.MODIFY_PASSWORD_PAGE)){
				doJob=new DoJob(modifyPassword);
			}
			doJob(atm);
		}
		
		private void register(ATMForm atm){
			ArrayList controls=atm.getControls(ATMForm.REGISTER_PAGE);
			Bank.current=(Bank)(((ComboBox)controls[1]).SelectedItem);
			string bank=Bank.current.shortName.Trim();
			string idno=((TextBox)controls[3]).Text.Trim();
			string name=((TextBox)controls[5]).Text.Trim();
			string newpwd=((TextBox)controls[7]).Text.Trim();
			string cfmpwd=((TextBox)controls[9]).Text.Trim();
			string cardNo="";
			try{
				if (idno.Length==0)
					throw new ATMException("The Identity Card should not be empty!");
				if (name.Length==0)
					throw new ATMException("The Real Name should not be empty!");
				if (newpwd.Length==0)
					throw new ATMException("The Password should not be empty!");
				if (!newpwd.Equals(cfmpwd))
					throw new ATMException("The passwords are not match!");
				
				Customer c=new Customer(idno,name);
				if (c.Equals(c.getEntityByID()))
					throw new ATMException("Customer already exists!");
				
				CustomerLogin cl=new CustomerLogin(idno,newpwd);
				
				CustomerBalance cb=null;
				int generateTime=10000;
				do{
					cardNo=Bank.current.NoGenerater();
					cb=new CustomerBalance(idno,bank,cardNo,0);
					if ((generateTime--)==0)
						throw new ATMException("Sorry, There is no more numbers can be applied!");
				}while(this.isAlreadyRegister(cb));
				
				c.save();
				cb.save();
				cl.save();
				atm.updateBalance();
				string info="Successfully, Your card number is "+cardNo;
				info+="\nYou may get it from the Clipboard";
				MessageBox.Show(info,"ATM");
				Clipboard.SetDataObject(cardNo,true);
				atm.customer=c;
				atm.showPage(ATMForm.OPERATION_PAGE);
			}catch(ATMException ae){
				MessageBox.Show(ae.Message,"ATM Error");
			}
		}
		
		private void modifyPassword(ATMForm atm){
			ArrayList controls=atm.getControls(ATMForm.MODIFY_PASSWORD_PAGE);
			string oldpwd=((TextBox)controls[1]).Text.Trim();
			string newpwd=((TextBox)controls[3]).Text.Trim();
			string cfmpwd=((TextBox)controls[5]).Text.Trim();
			string idno=atm.customer.IDNo;
			try{
				if (oldpwd.Length==0)
					throw new ATMException("The Login Password should not be empty!");
				if (newpwd.Length==0)
					throw new ATMException("The New Password should not be empty!");
				if (!newpwd.Equals(cfmpwd))
					throw new ATMException("The passwords are not match!");
				
				CustomerLogin cl=new CustomerLogin();
				cl.IDNo=idno;
				cl=(CustomerLogin)cl.getEntityByID();
				if (!cl.password.Equals(oldpwd))
					throw new ATMException("Password Error!");
				cl.password=newpwd;
				cl.save();
				
				MessageBox.Show("Successfully");
				atm.returnPage();
			}catch(ATMException ae){
				MessageBox.Show(ae.Message,"ATM Error");
			}			
		}
		
		private bool isAlreadyRegister(CustomerBalance cb){
			ArrayList al=cb.getEntitiesByProperty("cardNo");
			foreach(Object o in al){
				if (((CustomerBalance)o).cardType.Equals(cb.cardType))
					return true;
			}
			return false;
		}
	}
	
	public class Confirm:IButtonDelegater{
		public void Execute(object obj,EventArgs er){
			DoJob doJob=null;
			Button btn=(Button)obj;
			ATMForm atm=(ATMForm)btn.GetContainerControl();
			String page=atm.getCurrentPage();
			if (page.Equals(ATMForm.DEPOSIT_PAGE)){
				doJob=new DoJob(deposit);
			}else if (page.Equals(ATMForm.DRAW_PAGE)){
				doJob=new DoJob(draw);
			}
			doJob(atm);
		}
		
		private void deposit(ATMForm atm){
			ArrayList controls=atm.getControls(ATMForm.DEPOSIT_PAGE);
			int balance=0;
			try{
				balance=int.Parse(((TextBox)controls[1]).Text.Trim());
			}catch(Exception e){
				throw new ATMException(e);
			}
			
			try{
				if ((balance % 50)!=0)
					throw new ATMException("The Balance must be the multiple of 50");

				CustomerBalance cb=new CustomerBalance();
				cb.IDNo=atm.customer.IDNo;
				cb=(CustomerBalance)cb.getEntityByID();
				cb.balance=cb.balance+balance;
				cb.save();
				
				MessageBox.Show("Successfully");
				atm.updateBalance();
				atm.returnPage();
			}catch(ATMException ae){
				MessageBox.Show(ae.Message,"ATM Error");
			}		
		}
		
		private void draw(ATMForm atm){
			ArrayList controls=atm.getControls(ATMForm.DRAW_PAGE);
			int balance=0;
			try{
				balance=int.Parse(((TextBox)controls[2]).Text.Trim());
			}catch(Exception e){
				throw new ATMException(e);
			}

			try{
				if ((balance % 50)!=0)
					throw new ATMException("The Balance must be the multiple of 50");

				CustomerBalance cb=new CustomerBalance();
				cb.IDNo=atm.customer.IDNo;
				cb=(CustomerBalance)cb.getEntityByID();
				if (cb.balance<balance)
					throw new ATMException("You do not have so many Balance!");
				cb.balance=cb.balance-balance;
				cb.save();
				
				MessageBox.Show("Successfully");
				atm.updateBalance();
				atm.returnPage();
			}catch(ATMException ae){
				MessageBox.Show(ae.Message,"ATM Error");
			}		
		}
	}
	
	public class Cancel:IButtonDelegater{
		public void Execute(object obj,EventArgs er){
			Button btn=(Button)obj;
			ATMForm atm=(ATMForm)btn.GetContainerControl();
			atm.returnPage();
		}
	}
	
	public class ExitATM:IButtonDelegater{
		public void Execute(object obj,EventArgs er){
			Environment.Exit(0);
		}
	}
}