如何计算两个日期之间的天数 [英] How to calculate number of days between two dates

问题描述

我有两个输入日期来自日期选择器控件。我选择了开始日期2/2/2012和结束日期2/7/2012。我已经为此编写了以下代码。

I have two input dates taking from Date Picker control. I have selected start date 2/2/2012 and end date 2/7/2012. I have written following code for that.

我应该得到结果为6但我得到5。

I should get result as 6 but I am getting 5.

function SetDays(invoker) {   
    var start = $find('<%=StartWebDatePicker.ClientID%>').get_value();
    var end = $find('<%=EndWebDatePicker.ClientID%>').get_value();

    var oneDay=1000 * 60 * 60 * 24;
    var difference_ms = Math.abs(end.getTime() - start.getTime())
    var diffValue = Math.round(difference_ms / oneDay);
}

谁能告诉我如何才能得到确切的区别？

Can anyone tell me how I can get exact difference?

推荐答案

http://momentjs.com/或 https://date-fns.org/

From Moment docs：

From Moment docs:

var a = moment([2007, 0, 29]);
var b = moment([2007, 0, 28]);
a.diff(b, 'days')   // =1

或包含开始：

a.diff(b, 'days')+1   // =2

手动打乱时间戳和时区。

Beats messing with timestamps and time zones manually.

具体取决于您的具体情况用例，你可以

Depending on your specific use case, you can either

1. 使用 a / b.startOf（'day'）和/或 a / b.endOf（'day'）强制差异在结束包含或排除（正如@kotpal在评论）。


2. 设置第三个参数 true 以获得浮点差异，然后可以 Math.floor ， Math.ceil 或 Math.round 根据需要。


3. 选项2也可以通过获取'秒'而不是'days'然后除以<$来完成c $ c> 24 * 60 * 60 。

1. Use a/b.startOf('day') and/or a/b.endOf('day') to force the diff to be inclusive or exclusive at the "ends" (as suggested by @kotpal in the comments).
2. Set third argument true to get a floating point diff which you can then Math.floor, Math.ceil or Math.round as needed.
3. Option 2 can also be accomplished by getting 'seconds' instead of 'days' and then dividing by 24*60*60.

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