c# - 更好的逻辑来检查财政年度日期

Question

我已经有一个逻辑来检查输入的日期是否恰好是财政年度日期

if (DateTime.IsLeapYear(endate.Year))
{
    if (totalDay != 366)
    {
        error("Please make sure start and end dates are financial year dates.<br />E.g.<br /> Start Date:01/07/2012 <br /> End Date :30/06/2013");
        return;
    }
}
else
{
    if (totalDay != 365)
    {
        error("Please make sure start and end Dates are Financial year dates.<br />E.g.<br /> Start Date:01/07/2012 <br /> End Date :30/06/2013");
        return;
    }
}

我通过这种方式检查输入的日期是否恰好相差 1 年。但它不会检查用户是否准确输入了开始日期 01/07/20XX - 结束日期 30/06/20XX。我可以硬编码并验证日期和月份，并检查输入年份之间的差异来实现这一点，但我有更好的方法吗？

Answer 1

希望对你有帮助

DateTime starDate = TextToDate(txtStartDate.Text); //01/07/2013
// or startDate = DateTimePicker1.Value;

DateTime endDate = TextToDate(txtEndDate.Text);  //30/06/2014
// or endDate = DatetTimePicker2.Value

DateTime calculatedEndDate = startDate.AddYears(1).AddDays(-1);
// 01/07/2013 .AddYears(1) ==> 01/07/2014 .AddDays(-1) ==> 30/06/2014

// Note for above line:
//     if you will be using the start date and end date in an sql query
//     remove the call to function AddDays(-1)
//     for display purposes, keep the function AddDays(-1)


if(endDate != calculatedEndDate)
// note: if DateTimePicker is returning time component, then you will need to compare each (year, month and day)
{
    // show error message
}
else
{
    // dates are 1 year apart.
}

或者，您可以要求用户仅输入开始日期，然后计算结束日期。