如何从两个datetimepicker中减去日期? [英] How to subtract the date from two datetimepicker?

问题描述

我在Visual Studio 2008中使用VB.有人知道要减去2 datetimepicker确定VB中的天数的代码是什么?我正在为一个项目做项目，因此我必须为一个特定的任务计算多少天，这一点至关重要.我需要用一个空文本框填充.天.

在此先感谢.

Hi,

I''m using VB in visual studio 2008. Anyone know what are the codes to subtracting 2 datetimepickers to determine the number of days in VB? i''m doing a project for and it is essential that i count how many days for a specific task. I need to fill an empty textbox with the no. of days.

Thanks in advance.

推荐答案

请更全面地了解结构System.DateTime.已定义一个减法运算符.所以:

Please look more thoroughly at the structure System.DateTime. Is has a subtraction operator defined. So:

System.DateTime first = firstDateTimePicker.Value;
System.DateTime second = secondDateTimePicker.Value;
//best syntax is using operator, not the method call, because it looks unambiguous: 
System.TimeSpan timeSpan = second - time; //not a problem if first is later time, negative time spans are allowed

请参阅:
http://msdn.microsoft.com/en-us/library/system.datetime.aspx [ ^ ]，
http://msdn.microsoft.com/en-us/library/system.windows.forms.datetimepicker.value.aspx [ ^ ].

现在，更彻底地查看结构System.TimeSpan:
http://msdn.microsoft.com/en-us/library/system.timespan.aspx [ ^ ].

它具有一切以所需单位表示垃圾邮件时间的功能.请注意，Total…属性为您提供任何单位的分数值；其他属性可根据需要计算整数天数，小时数等.

仔细阅读MSDN；你会没事的. :-)

—SA

Please see:
http://msdn.microsoft.com/en-us/library/system.datetime.aspx[^],
http://msdn.microsoft.com/en-us/library/system.windows.forms.datetimepicker.value.aspx[^].

Now, look more thoroughly at the structure System.TimeSpan:
http://msdn.microsoft.com/en-us/library/system.timespan.aspx[^].

It has everything to express the time spam in required units. Pay attention that Total… properties give you the fractional value in any units; other properties calculate integer number of days, hours, etc., whatever you need.

Read MSDN more thoroughly; and you will be all right. :-)

—SA

我认为这可能对您有所帮助...

I think it may help you...

MsgBox(DateDiff(DateInterval.Day, DateTimePicker1.Value, DateTimePicker2.Value))
MsgBox(DateDiff(DateInterval.Month, DateTimePicker1.Value, DateTimePicker2.Value))
MsgBox(DateDiff(DateInterval.Year, DateTimePicker1.Value, DateTimePicker2.Value))

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