blocks|key|1163148|text|使用DateTime.ParseExact方法将字符串从自定义格式转换为DateTime|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1163149|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/w2sa9yss.aspx^0|2|J|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Use <a href="http://msdn.microsoft.com/en-us/library/w2sa9yss.aspx" rel="nofollow">DateTime.ParseExact</a> Method to convert strings from custom format to DateTime

blocks|key|18938|text|试试dateValue.ToString("dddd+hh:mm+tt",+CultureInfo.CreateSpecificCulture("en-US"))|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|18939|18940|dddd+-+week.|unordered-list-item|BOLD|18941|hh日期的全称-小时，使用从01到12.|18942|mm的12小时制-分钟，从00到59.|18943|tt+-+AM/PM指示符。|18944|18945|你可以参考MSDN获取更多信息。|18946|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/8kb3ddd4.aspx^0|2|27|0|0|0|4|0|0|2|0|0|2|0|0|2|0|0|5|4|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|14|8|@]|D|@]|E|$]]|$1|G|3|H|5|I|7|15|8|@$9|16|A|17|B|J]]|D|@]|E|$]]|$1|K|3|L|5|I|7|18|8|@$9|19|A|1A|B|J]]|D|@]|E|$]]|$1|M|3|N|5|I|7|1B|8|@$9|1C|A|1D|B|J]]|D|@]|E|$]]|$1|O|3|P|5|I|7|1E|8|@$9|1F|A|1G|B|J]]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|1H|8|@]|D|@]|E|$]]|$1|R|3|S|5|6|7|1I|8|@]|D|@$9|1J|A|1K|1|1L]]|E|$]]|$1|T|3|-4|5|6|7|1M|8|@]|D|@]|E|$]]]|U|$V|$5|W|X|Y|E|$Z|10]]]]

Try <code>dateValue.ToString("dddd hh:mm tt", CultureInfo.CreateSpecificCulture("en-US"))</code>

<ul>
<li>dddd - The full name of the day of the week.</li>
<li>hh - The hour, using a 12-hour clock from 01 to 12.</li>
<li>mm - The minute, from 00 through 59.</li>
<li>tt - The AM/PM designator.</li>
</ul>

You can refer to <a href="http://msdn.microsoft.com/en-us/library/8kb3ddd4.aspx" rel="nofollow">MSDN</a> for more info.

blocks|key|1159374|text|您正在尝试将Time值与DateTime值进行比较。我认为您只需要将array时间值与current时间值进行比较，在这种情况下，您可以比较日期的时间部分。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1159375|if+(DateTime.TryParse(i,+out+dateValue))
{
++if+(dateValue.ToShortTimeString()+==+DateTime.Now.ToShortTimeString())
++{
++++//do+something+here
++}
}|code-block|syntax|javascript|1159376|entityMap^0|6|4|C|8|Y|5|17|7|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|L|$]]

You are trying to compare <code>Time</code> value with <code>DateTime</code> value. I think you just want to compare that Time values of your <code>array</code> to <code>current</code> time value, in that case you can compare time part of the dates.

<pre><code>if (DateTime.TryParse(i, out dateValue))
{
 if (dateValue.ToShortTimeString() == DateTime.Now.ToShortTimeString())
 {
 //do something here
 }
}
</code></pre>

blocks|key|672822|text|请在此处检查Date+Time+Example或Date+Time+Format|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|672823|例如|672824|MyString+=+MyDateTime.ToString("dddd++hh:mm+tt");|code-block|syntax|javascript|672825|entityMap|0|LINK|mutability|MUTABLE|url|http://www.csharp-examples.net/string-format-datetime/|1|http://www.codeproject.com/Articles/14743/Easy-String-to-DateTime-DateTime-to-String-and-For^0|6|H|0|O|G|1|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]|$A|Y|B|Z|1|10]]|C|$]]|$1|D|3|E|5|6|7|11|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|12|8|@]|9|@]|C|$I|J]]|$1|K|3|-4|5|6|7|13|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]|S|$5|N|O|P|C|$Q|T]]]]

Please check here for <a href="http://www.csharp-examples.net/string-format-datetime/" rel="nofollow">Date Time Example</a> or <a href="http://www.codeproject.com/Articles/14743/Easy-String-to-DateTime-DateTime-to-String-and-For" rel="nofollow">Date Time Format</a>

For example

<pre><code>MyString = MyDateTime.ToString("dddd hh:mm tt");
</code></pre>

blocks|key|1163216|text|它应该是这样工作的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1163217|if+(DateTime.TryParse(i,+out+dateValue))
{
++if+(dateValue.ToShortTimeString()+==+DateTime.ToString("dd+hh:mm+tt"))
++{
++++//do+something+here
++}
}|code-block|syntax|javascript|1163218|dd告诉您显示当前日期。hh显示小时数，mm分钟数。我离开了的ss几秒钟，因为它似乎你不需要它。通过tt，将显示+PM或AM。|offset|length|style|BOLD|1163219|entityMap^0|0|0|0|2|C|2|K|2|U|3|1E|6|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]|$I|T|J|U|K|L]|$I|V|J|W|K|L]|$I|X|J|Y|K|L]|$I|Z|J|10|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$]]

It should work this way.

<pre><code>if (DateTime.TryParse(i, out dateValue))
{
 if (dateValue.ToShortTimeString() == DateTime.ToString("dd hh:mm tt"))
 {
 //do something here
 }
}
</code></pre>

dd tells to show the current day. hh displays the hours and mm the minutes. I left ss for seconds because it seems you don't need it. Through tt PM or AM will get displayed.

blocks|key|18998|text|首先，您需要将调度字符串数组中的时间转换为DateTime。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|18999|关于DateTime样式的链接：http://www.csharp-examples.net/string-format-datetime/|offset|length|19000|在那之后，你只需要比较两个日期的时间部分。答案从这里开始：How+to+compare+time+part+of+datetime|19001|所以，最后你的代码应该是这样的：|19002|string[]+schedule+=+{+"Thursday+2:47+PM",+"Thursday+2:50+PM",+"Thursday+2:55+PM"+};
private+void+timer1_Tick(object+sender,+EventArgs+e)
{
++++DateTime+dateValue;
++++foreach+(var+i+in+schedule)
++++{
++++++++if+(DateTime.TryParseExact(i,+"dddd+h:mm+tt",+CultureInfo.CreateSpecificCulture("en-US"),+DateTimeStyles.None,+out+dateValue))
++++++++{
++++++++++++var+currentDate+=+DateTime.Now;
++++++++++++if+(dateValue.DayOfWeek+==+currentDate.DayOfWeek+&&+dateValue.TimeOfDay+==+currentDate.TimeOfDay)
++++++++++++{
++++++++++++++++//do+something+here
++++++++++++}
++++++++}
++++}
}

private+void+Form1_Shown(object+sender,+EventArgs+e)
{
++++timer1.Start();
}|code-block|syntax|javascript|19003|当然，您可以将DateTime.Now转换为有效格式的字符串(就像在字符串数组中一样)，但我认为这是错误的。如果要检查日期是否早于或晚于当前日期，则必须重写代码。|19004|entityMap|0|LINK|mutability|MUTABLE|url|http://www.csharp-examples.net/string-format-datetime/|1|https://stackoverflow.com/questions/10290187/how-to-compare-time-part-of-datetime^0|0|G|1I|0|0|T|10|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@]|9|@$D|12|E|13|1|14]]|A|$]]|$1|F|3|G|5|6|7|15|8|@]|9|@$D|16|E|17|1|18]]|A|$]]|$1|H|3|I|5|6|7|19|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|1A|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|1B|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]|Y|$5|T|U|V|A|$W|Z]]]]

First, you need to convert time in schedule string array into DateTime.

Link about DateTime styles: <a href="http://www.csharp-examples.net/string-format-datetime/" rel="nofollow noreferrer">http://www.csharp-examples.net/string-format-datetime/</a>

After that, you need to compare only time part of 2 dates. Took the answer from here: <a href="https://stackoverflow.com/questions/10290187/how-to-compare-time-part-of-datetime">How to compare time part of datetime</a>

So, finally your code will be something like this:

<pre><code>string[] schedule = { "Thursday 2:47 PM", "Thursday 2:50 PM", "Thursday 2:55 PM" };
private void timer1_Tick(object sender, EventArgs e)
{
 DateTime dateValue;
 foreach (var i in schedule)
 {
 if (DateTime.TryParseExact(i, "dddd h:mm tt", CultureInfo.CreateSpecificCulture("en-US"), DateTimeStyles.None, out dateValue))
 {
 var currentDate = DateTime.Now;
 if (dateValue.DayOfWeek == currentDate.DayOfWeek &amp;&amp; dateValue.TimeOfDay == currentDate.TimeOfDay)
 {
 //do something here
 }
 }
 }
}

private void Form1_Shown(object sender, EventArgs e)
{
 timer1.Start();
}
</code></pre>

Of course, you can convert DateTime.Now to a string of valid format (as in your string array) but I think that it's wrong. If you want to check that your date is earlier or later than current date, you will have to rewrite your code.

I want to know how can I format <code>DateTime.Now</code> in this same format <code>Thursday 03:00 PM</code> so that I can compare it to my custom format date time value,

I am trying to create a simple scheduling system, that if a specific date time will be equivalent to current date time a code will run under it but I am stuck in comparing my custom dates to current date time

<pre><code>string[] schedule = { "Thursday 2:47 PM", "Thursday 2:50 PM", "Thursday 2:55 PM" };
 private void timer1_Tick(object sender, EventArgs e)
 {
 DateTime dateValue;
 foreach (var i in schedule)
 {
 if (DateTime.TryParse(i, out dateValue))
 {
 if (dateValue == DateTime.Now)
 {
 //do something here
 }
 }
 }
 }

 private void Form1_Shown(object sender, EventArgs e)
 {
 timer1.Start();
 }
</code></pre>

How to set custom format to DateTime.Now?

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。

文章

问答

视频

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

我想知道如何以这种相同格式的Thursday 03:00 PM格式化DateTime.Now，以便将它与我的自定义格式日期时间值进行比较，我正在尝试创建一个简单的调度系统，如果一个特定的日期时间等于当前的日期时间，一个代码将在它下面运行，但是我被困在比较我的自定义日期和当前的日期时间string[] schedule ...

问如何设置自定义格式为DateTime.Now？
EN

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何设置自定义格式为DateTime.Now？EN