计算日期 [英] Calculate Dates

问题描述

嗨 在我的程序中，有3个文本框. 1是退货日期文本框2是实际退货日期文本框，第3个是滞后费文本框.如何使用退货日期文本框和实际退货日期文本框来计算滞纳金，一天的罚款为10/-.

Hi In my program 3 text boxes are there. 1 is Return Date TextBox 2 is Actual Return Date Text Box & 3 rd one is Late Fee Text Box.How to calculate Late fee By using Return Date TextBox & Actual Return date TextBox and One day fine is 10/-.

推荐答案

使用 TimeSpan [

Use a TimeSpan[^] to calculate the elapsed time and then use that to work out what the appropriate payment should be: perhaps multiply the difference in hours by whatever you need.

您可以在日期中添加或减去TimeSpan对象:

You can Add or Subtract TimeSpan objects to a date:

DateTime dueDate     = new DateTime(2011,1,15);
DateTime tenDaysLate = dueDate.Add(new TimeSpan(10,0,0,0,0);
DateTime now         = DateTime.Now;

if (now > tenDaysLate)
{
    // charge late fee
}

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