【发布时间】:2017-10-07 18:28:54
【问题描述】:
我有一个按钮,需要在 ArrayList 中的当前交易日期上增加 3 天。
如何做到这一点?
代码如下:
private void btnCheckCleared_Click(object sender, EventArgs e)
{
foreach (Transaction item in tranArray)
{
if (What goes here?)
{
DateTime.Today.AddDays(3).ToLongDateString();
}
}
}
如果您需要更多代码,请告诉我。
这是我的 Transaction.cs 代码:
namespace TEXT TEXT TEXT
{
public class Transaction
{
//data hiding (blackbox)
//visible only to class itself
//fields (variables)
//4 member variables (instantiate object)
private decimal decAmount;
private DateTime dteTransactionDate;
private string strCheckNumber;
private string strPayee;
private string strTypeTrans;
public bool CheckCleared;
public decimal Amount
{
get
{
return decAmount;
}
set
{
decAmount = value;
}
}
public string CheckNumber
{
get
{
return strCheckNumber;
}
set
{
strCheckNumber = value;
}
}
public string Payee
{
get
{
return strPayee;
}
set
{
strPayee = value;
}
}
public DateTime TransactionDate
{
get
{
return dteTransactionDate;
}
set
{
dteTransactionDate = value;
}
}
public TransactionType TypeTrans;
//constructor
public Transaction(string payee, decimal amount, TransactionType typeTrans, DateTime transactionDate)
{
this.Payee = payee; //assignment operator =
this.Amount = amount; //this is to qualify
this.TypeTrans = typeTrans;
this.TransactionDate = transactionDate;
}
public Transaction(string payee, decimal amount, TransactionType typeTrans, DateTime transactionDate, string checkNumber)
{
this.Payee = payee; //assignment operator =
this.Amount = amount; //this is to qualify
this.CheckNumber = checkNumber;
this.TypeTrans = typeTrans;
this.TransactionDate = transactionDate;
}
//public Transaction ()
public override string ToString()
{
return this.TransactionDate.ToShortDateString() + " " + this.Amount.ToString("C") + "\t" + this.TypeTrans;
}
}
}
【问题讨论】:
-
你的问题不清楚,能不能多解释一下。
-
Transaction 类是什么样的?它是否有要修改的 DateTime 字段?为什么我们会知道您想要什么作为“如果”条件?
-
好吧,您正在对事务进行操作,因此您的“如果”可能需要对事务类中的某些内容进行条件检查。因此,您的 if 将类似于“if (item.[Property] == [value])。此外,您需要设置 Transaction 类的一些属性来更新它。您可能希望将 3 天添加到课堂上的当前日期,而不是今天。所以:item.[DateProperty] = item.[DateProperty].AddDays(3);
-
只要支票日期至少在过去 3 天,标准要求一个新字段来存储支票是否已清算(布尔值)。例如现在,它显示,日期金额名称, 所以当用户点击 btnCheckClear 时,需要显示 Date Amount Name Cleared (Check) #.
-
-Aaron,您是说我需要更新 Transaction.cs 文件以显示更改并更新 main.cs?