C# 将字符串转换为时间
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Convert string to Time
提问by Apollo
I have a time that is 16:23:01. I tried using DateTime.ParseExact, but it's not working.
我有一个时间是 16:23:01。我尝试使用DateTime.ParseExact，但它不起作用。
Here is my code:
这是我的代码：
string Time = "16:23:01";
DateTime date = DateTime.ParseExact(Time, "hh:mm:ss tt", System.Globalization.CultureInfo.CurrentCulture);
lblClock.Text = date.ToString();
I want it to show in the label as 04:23:01 PM.
我希望它在标签中显示为 04:23:01 PM。
采纳答案by Jon Skeet
"16:23:01" doesn't match the pattern of "hh:mm:ss tt" - it doesn't have an am/pm designator, and 16 clearly isn't in a 12-hour clock. You're specifying that format in the parsingpart, so you need to match the format of the existing data. You want:
“16:23:01”与“hh:mm:ss tt”的模式不匹配 - 它没有 am/pm 指示符，而且 16 显然不在 12 小时制中。您在解析部分指定了该格式，因此您需要匹配现有数据的格式。你要：
DateTime dateTime = DateTime.ParseExact(time, "HH:mm:ss",
CultureInfo.InvariantCulture);
(Note the invariant culture, notthe current culture - assuming your input genuinely always uses colons.)
（注意不变的文化，而不是当前的文化 - 假设您的输入确实总是使用冒号。）
If you want to formatit to hh:mm:ss tt, then you need to put that part in the ToStringcall:
如果要将其格式化为hh:mm:ss tt，则需要将该部分放入ToString调用中：
lblClock.Text = date.ToString("hh:mm:ss tt", CultureInfo.CurrentCulture);
Or better yet (IMO) use "whatever the long time pattern is for the culture":
或者更好（IMO）使用“无论文化的长期模式是什么”：
lblClock.Text = date.ToString("T", CultureInfo.CurrentCulture);
Also note that hhis unusual; typically you don'twant to 0-left-pad the number for numbers less than 10.
还要注意这hh是不寻常的；通常，您不想为小于 10 的数字添加 0-left-pad。
(Also consider using my Noda TimeAPI, which has a LocalTimetype - a more appropriate match for just a "time of day".)
（还可以考虑使用我的Noda TimeAPI，它有一个LocalTime类型 - 更适合“一天中的某个时间”。）
回答by bhs
string Time = "16:23:01";
DateTime date = DateTime.Parse(Time, System.Globalization.CultureInfo.CurrentCulture);
string t = date.ToString("HH:mm:ss tt");
回答by bhs
This gives you the needed results:
这为您提供了所需的结果：
string time = "16:23:01";
var result = Convert.ToDateTime(time);
string test = result.ToString("hh:mm:ss tt", CultureInfo.CurrentCulture);
//This gives you "04:23:01 PM" string
You could also use CultureInfo.CreateSpecificCulture("en-US")as not all cultures will display AM/PM.
您也可以使用，CultureInfo.CreateSpecificCulture("en-US")因为并非所有文化都会显示 AM/PM。
回答by Aleks
The accepted solution doesn't cover edge cases. I found the way to do this with 4KB script. Handle your input and convert a data.
接受的解决方案不包括边缘情况。我找到了使用 4KB 脚本执行此操作的方法。处理您的输入并转换数据。
Examples:
例子：
00:00:00 -> 00:00:00
12:01 -> 12:01:00
12 -> 12:00:00
25 -> 00:00:00
12:60:60 -> 12:00:00
1dg46 -> 14:06
You got the idea... Check it https://github.com/alekspetrov/time-input-js
