blocks|key|629281|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|629282|您应该将您的开始时间转换为UTC时间，例如‘|ordered-list-item|629283|’。现在您可以将您的开始时间与当前的UTC时间进行比较。|629284|629285|这种方法意味着您将获得夏令时更改前后的正确答案。|629286|通过将时间添加到开始时间，而不是减去和比较TimeSpan上的总时间，您有一个更可读的语法，您可以处理更多日期差异的情况，例如，从开始1个月，开始2周，...|629287|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|-4|4|5|6|M|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|N|7|@]|8|@]|9|$]]|$1|D|3|E|4|C|6|O|7|@]|8|@]|9|$]]|$1|F|3|-4|4|5|6|P|7|@]|8|@]|9|$]]|$1|G|3|H|4|5|6|Q|7|@]|8|@]|9|$]]|$1|I|3|J|4|5|6|R|7|@]|8|@]|9|$]]|$1|K|3|-4|4|5|6|S|7|@]|8|@]|9|$]]]|L|$]]

<ol>
<li>You should convert your start time to a UTC time, say 'start'.</li>
<li>You can now compare your start time to the current UTC time using: 

<code>start.AddMinutes(20) &gt; DateTime.UtcNow</code></li>
</ol>

This approach means that you will get the correct answer around daylight savings time changes.

By adding time to the start time instead of subtracting and comparing the total time on a TimeSpan you have a more readable syntax AND you can handle more date difference cases, e.g. 1 month from the start, 2 weeks from the start, ...

blocks|key|2798886|text|var+start+=+DateTime.Now;
var+oldDate+=+DateTime.Parse("08/10/2011+23:50:31");

if+((start+-+oldDate).TotalMinutes+>=+20)
{
++++//20+minutes+were+passed+from+start++
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2798887|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>var start = DateTime.Now;
var oldDate = DateTime.Parse("08/10/2011 23:50:31");

if ((start - oldDate).TotalMinutes &gt;= 20)
{
 //20 minutes were passed from start 
}
</code></pre>

blocks|key|4413874|text|var+start+=+DateTime.Now;
var+oldDate+=+DateTime.Parse("08/10/2011+23:50:31");+

++++if(start.Subtract(oldDate)+>=+TimeSpan.FromMinutes(20))+
++++{
+++++//20+minutes+were+passed+from+start
++++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4413875|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>var start = DateTime.Now;
var oldDate = DateTime.Parse("08/10/2011 23:50:31"); 

 if(start.Subtract(oldDate) &gt;= TimeSpan.FromMinutes(20)) 
 {
 //20 minutes were passed from start
 }
</code></pre>

blocks|key|4696473|text|将oldDate解析为DateTime对象(DateTime.Parse)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4696474|从start中减去解析后的日期。这将返回一个TimeSpan。|4696475|检查TotalMinutes。|4696476|entityMap^0|1|7|B|8|M|E|0|1|5|M|8|0|2|C|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]|$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|J|3|-4|5|6|7|10|8|@]|D|@]|E|$]]]|K|$]]

Parse <code>oldDate</code> into a <code>DateTime</code> object (<code>DateTime.Parse</code>). 

Subtract the parsed date from <code>start</code>. This will return a <code>TimeSpan</code>.

Inspect <code>TotalMinutes</code>.

blocks|key|4696577|text|通过在我的项目中使用JodaTime库，我能够做到这一点。我带着这个代码出来的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4696578|String+datetime1+=+"2012/08/24+05:22:34";
String+datetime2+=+"2012/08/24+05:23:28";

DateTimeFormatter+format+=+DateTimeFormat.forPattern("yyyy/MM/dd+HH:mm:ss");
DateTime+time1+=+format.parseDateTime(datetime1);
DateTime+time2+=+format.parseDateTime(datetime2);
Minutes+Interval+=+Minutes.minutesBetween(time1,+time2);
Minutes+minInterval+=+Minutes.minutes(20);

if(Interval.isGreaterThan(minInterval)){
++return+true;
}
else{
++return+false;
}|code-block|syntax|javascript|4696579|这将检查datetime1和datetime2之间的时间间隔是否为GreaterThan+20分钟。将该属性更改为Second。这对你来说会更容易。这将返回false。|4696580|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I was able to accomplish this by using a JodaTime Library in my project. I came out with this code.

<pre><code>String datetime1 = "2012/08/24 05:22:34";
String datetime2 = "2012/08/24 05:23:28";

DateTimeFormatter format = DateTimeFormat.forPattern("yyyy/MM/dd HH:mm:ss");
DateTime time1 = format.parseDateTime(datetime1);
DateTime time2 = format.parseDateTime(datetime2);
Minutes Interval = Minutes.minutesBetween(time1, time2);
Minutes minInterval = Minutes.minutes(20);

if(Interval.isGreaterThan(minInterval)){
 return true;
}
else{
 return false;
}
</code></pre>

This will check if the Time Interval between datetime1 and datetime2 is GreaterThan 20 Minutes. Change the property to Seconds. It will be easier for you know. This will return false.

blocks|key|4413933|text|var+end+=+DateTime.Parse(oldDate);+++
+if+(start.Hour+==+end.Hour+&&+start.AddMinutes(20).Minute+>=+end.Minute)|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4413934|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>var end = DateTime.Parse(oldDate); 
 if (start.Hour == end.Hour &amp;&amp; start.AddMinutes(20).Minute &gt;= end.Minute)
</code></pre>

How to check if 20 minutes have passed from current date?

For example: 

<pre><code>var start = DateTime.Now;
var oldDate = "08/10/2011 23:50:31"; 

 if(start ??) {
 //20 minutes were passed from start
 }
</code></pre>

what's the best way to do this?
Thanks :)

Date comparison - How to check if 20 minutes have passed?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如何检查当前日期是否已经过了20分钟？例如：var start = DateTime.Now;var oldDate = "08/10/2011 23:50:31";     if(start ??) {     //20 minutes were passed from start    }做这件事最好的方法是什么？谢谢:)

问日期对比-如何查看是否已过20分钟？
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问日期对比-如何查看是否已过20分钟？
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