DateTime.ToString（）无法按预期使用斜杠作为日期分隔符

Question

I want to convert the date time to "MM/dd/yyyy" and when i am converting to this format the date is getting like "xx-xx-xxxx". I have written code like

  var format = "MM/dd/yyyy HH:mm";
  DateTime dt = DateTime.Now;
  var dateString = dt.toString(format); // the value i am getting is 05-28-2014 12:47 but i require the 'dateString' value to be `05/28/2014 12:53`. 

What is the issue with that.

Answer 1

Your currrent culture's date-separator seems to be - that's why you get it. You have to specify InvariantCulture :

string dateString = dt.toString("MM/dd/yyyy HH:mm", CultureInfo.InvariantCulture);  

See: The "/" Custom Format Specifier

The "/" custom format specifier represents the date separator, which is used to differentiate years, months, and days. The appropriate localized date separator is retrieved from the DateTimeFormatInfo.DateSeparator property of the current or specified culture .

Another way is to escape the / with \\ :

string dateString = dt.toString(@"MM\/dd\/yyyy HH\:mm");  

But in my opinion, if you already know the special meaning of / as "current culture's date-separator", it's better(in terms of readability) to use the correct CultureInfo (or InvariantCulture ) instead.

Answer 2

This depends on your current culture date-separator. Try to include InvariantCulture as follows:

var dateStringFormat= dt.toString("MM/dd/yyyy HH:mm", CultureInfo.InvariantCulture);  

Answer 3

来自@TimSchmelter的答案的另一种方法是转义特殊符号/和:因此它们不被视为日期和时间分隔符。

var dateString = dt.toString(@"MM\/dd\/yyyy HH\:mm");

Answer 4

you will specified the format while converting date and time ie DateTime.Now.ToString("MM/dd/yyyy hh:mm ss tt")

for more ref. http://msdn.microsoft.com/en-us/library/system.datetime.aspx