如何从JavaScript或c＃中删除日期/时间字符串中的秒数？

Question

I have the option of using either JavaScript or c# to accomplish this task.

I have a lot of strings in the format "10/14/2012 8:45:34 PM" How do I remove the seconds and retain the PM like so "10/14/2012 8:45PM"?

I can't use substring because the length of the string will be different with each day and time.

Answer 1

In C#, you can do this:

myTime.ToString("MM/dd/yyyy hh:mmtt");

Alternatively, you can use the built in Format Specifiers described here .

Edit - I removed the space between mm and tt because I just noticed your post shows 8:45PM . You can add a space between mm and tt if you want it to be 8:45 PM .

Answer 2

If the string is consistently formatted, then:

var s = '10/14/2012 8:45:34 PM';
s = s.replace(/:\d+ (\w\w)$/, '$1'); // 10/14/2012 8:45PM

I hope that is only going to be used by a very limited audience since that format will be misunderstood by the vast majority of people. A more widely understood and much less unambiguous format is:

2012-10-14 8:45PM

Answer 3

You can use a regular expression.

C#:

string d = "10/14/2012 8:45:34 PM";
d = Regex.Replace(d, @":\d\d ", String.Empty);

Javascript:

var d = "10/14/2012 8:45:34 PM";
d = d.replace(/:\d\d /, '');

Answer 4

You can make use of Regular Expression for string manipulation and is pretty easier.

 var mydate = "10/14/2012 8:45:34 PM"; var formated_date = mydate.replace(/(\\d{1,2})\\/(\\d{1,2})\\/(\\d{4})\\ (\\d{1,2}):(\\d{1,2}):(\\d{1,2})\\ (.*)/, "$1/$2/$3\\ $4:$5$7"); document.write(formated_date); 

Answer 5

well, you could try:

var string="10/14/2012 8:45:34 PM";
var resultArray = string.split(":");
var result = string.replace(resultArray[2],"");

which should work effectively in javascript. ill test it out in a second, and update this.

UPDATE:

var string="10/14/2012 8:45:34 PM";
var resultArray = string.split(":");
var result = string.replace(":"+resultArray[2]," ")+resultArray[2].split(" ")[1];

A tad yucky. but it works just fine: http://jsfiddle.net/x8uUW/

UPDATE using regex (i used a regex generator, so it is not as compact as it could be, by any means. but it does work: http://jsfiddle.net/x8uUW/1/

Answer 6

我尝试在Axure JavaScript中使用ToString()来设置小部件的文本，但是失败了，Axure中的正则表达式是不可能的（至少在我发布这个时），所以我想出了另一个简单的替代方案，但效率低下这样做的方法：

aDate.toLocaleTimeString().replace(':'+aDate.getSeconds(),'')