Question

我想创建一个简单的银行申请表。此表单将包含19个帐户对象的数组。当用户单击“创建”按钮时，它将创建一个具有accountID和开放金额的帐户。输入帐户ID和金额并单击存款按钮时，它会将钱存入该特定帐户。当点击撤销按钮时，当特定帐户被提取时，它从特定帐户中提取资金。当accountid具体时，balancebutton click会为您提供帐户余额。

这是我的代码..

public class Accounts
{ 

    public int AccountId { get; set; }
    public decimal Balance { get; set; }



    public decimal Deposit(decimal amount)
    {
        Balance += amount;
        return Balance;
    }

    public void Withdraw(decimal amount)
    {
        Balance -= amount;
    }
}

以下是表单的代码：

using System.Windows.Forms;
namespace Bank
{
public partial class Bank : Form
{
    public Bank()
    {
        InitializeComponent();

    }

    Accounts[] arrayAccounts = new Accounts[19];

    decimal balance;

    private void createAccountButton_Click(object sender, EventArgs e)
    {
        for (int i = 0; i < arrayAccounts.Length; i++)
        {
            arrayAccounts[i] = new Accounts();
        }



        double amount = Convert.ToDouble(amountTextBox.Text);
        int AccountId = Convert.ToInt32(accountIDTexTBox.Text);
        OutPutLabel.Text = "Account #" + AccountId + "Opened with Balance of $" + amount;


    }
    private void DepositRadioButton_CheckedChanged(object sender, EventArgs e)
    {
        double amount ;


    }

    private void WithdrawRadioButton_CheckedChanged(object sender, EventArgs e)
    {
        double amount;

    }

    private void exceuteButton_Click(object sender, EventArgs e)
    {


    }

    private void amountTextBox_TextChanged(object sender, EventArgs e)
    {

    }

    private void balanceRadioButton_CheckedChanged(object sender, EventArgs e)
    {

    }
}
}

我真的需要帮助将accountid和amount传递给对象数组。并为depositButton，withdrwbutton和BalanceButton编写代码。

Answer 1

首先，我将您的DTO对象重命名为“帐户”。

如果Id存在于Accounts数组中，则下面应返回一个有效的Account对象，否则它应该返回null，然后你应该处理并告诉用户“Account is not exists”。如果有效的帐户对象然后采取适当的方法撤回或存款或取得平衡。

public Account GetAccount(int id)
{
  return arrayAccounts.Where(x => x.AccountId == id).FirstOrDefault();;
}

Answer 2

以下示例如何执行您的功能：

using System;
using System.Data;
using System.Linq;
using System.Windows.Forms;

namespace Bank
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private int _nextIndex = 0;
        private Account[] _accounts = new Account[19];

        private void createButton_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(accountIdTextBox.Text)) return;
            var account = new Account();
            int accountID;
            int balance=0;
            bool success=int.TryParse(accountIdTextBox.Text,out accountID);
            int.TryParse(amountTextBox.Text, out balance);
            if(success)
            {
                account.AccountId = accountID;
                account.Balance = balance;
                _accounts[_nextIndex] = account;
                _nextIndex++;
            }
            resultLabel.Text = "Created Account: " + accountID + " with Balance " + balance;
        }
        private Account GetAccount(int id)
        {
            return _accounts.Where(x => x.AccountId == id).FirstOrDefault();
        }
        private void depositButton_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(accountIdTextBox.Text)) return;
            int amount = 0;
            int accountID;
            bool success1 = int.TryParse(accountIdTextBox.Text, out accountID);
            bool success2 = int.TryParse(amountTextBox.Text, out amount);
            if(success1 && success2 && amount >0)
            {
                var selectedAccount = GetAccount(accountID);
                selectedAccount.Balance += amount;
                resultLabel.Text = "Account: " + accountID + " balance get deposit for " + amount;
            }
        }

        private void withdrawButton_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(accountIdTextBox.Text)) return;
            int amount = 0;
            int accountID;
            bool success1 = int.TryParse(accountIdTextBox.Text, out accountID);
            bool success2 = int.TryParse(amountTextBox.Text, out amount);
            if (success1 && success2 && amount > 0)
            {
                var selectedAccount = GetAccount(accountID);
                selectedAccount.Balance -= amount;
                resultLabel.Text = "Account: " + accountID + " balance withdrawed by " + amount;
            }
        }

        private void ballanceButton_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(accountIdTextBox.Text)) return;
            int amount = 0;
            int accountID;
            bool success1 = int.TryParse(accountIdTextBox.Text, out accountID);
            if (success1)
            {
                var selectedAccount = GetAccount(accountID);
                resultLabel.Text = "Account: " + accountID + ", Balance: " + selectedAccount.Balance;
            }
        }
    }
}

我已将您的课程Accounts重命名为Account

Answer 3

所以我做了一些与众不同的事情。我不太确定你想看到什么，但它在这里。首先，我重新创建了您的帐户：

var fullDate=d.toLocaleDateString();

然后我处理了表单，因此没有错误，它完全按照描述的内容（功能Create，withdraw和deposit都已实现）。

public int AccountId { get; set; }
        public decimal Balance { get; set; }

        public Account(int accountID, decimal balance)
        {
            AccountId = accountID;
            Balance = balance;
        }

        public void Deposit(decimal amount)
        {
            Balance += amount;
        }

        public void Withdraw(decimal amount)
        {
            Balance -= amount;
        }

        public override string ToString()
        {
            return AccountId + " " + Balance;
        }

随时问你是否还有其他问题。

C＃中的简单银行应用程序

3 个答案: