日期时间格式问题：字符串未被识别为有效的DateTime

Question

I want to format the input string into format in C#.
The input string is in format MM/dd/yyyy hh:mm:ss
For example : "04/30/2013 23:00"

I tried Convert.ToDateTime() function, but it considers 4 as date and 3 as month which is not what I want. Actually month is 04 and date is 03.

I tried DateTime.ParseExact() function also, But getting Exception.

I am getting error:

String was not recognized as a valid DateTime.

Answer 1

Your date time string doesn't contains any seconds. You need to reflect that in your format (remove the :ss ).
Also, you need to specify H instead of h if you are using 24 hour times:

DateTime.ParseExact("04/30/2013 23:00", "MM/dd/yyyy HH:mm", CultureInfo.InvariantCulture)

See here for more information:

Custom Date and Time Format Strings

Answer 2

You can use DateTime.ParseExact() method.

Converts the specified string representation of a date and time to its DateTime equivalent using the specified format and culture-specific format information. The format of the string representation must match the specified format exactly.

DateTime date = DateTime.ParseExact("04/30/2013 23:00", 
                                    "MM/dd/yyyy HH:mm", 
                                    CultureInfo.InvariantCulture);

Here is a DEMO .

hh is for 12-hour clock from 01 to 12, HH is for 24-hour clock from 00 to 23.

For more information, check Custom Date and Time Format Strings

Answer 3

try this:

string strTime = "04/30/2013 23:00";
DateTime dtTime;
if(DateTime.TryParseExact(strTime, "MM/dd/yyyy HH:mm",  
   System.Globalization.CultureInfo.InvariantCulture, 
   System.Globalization.DateTimeStyles.None, out dtTime))
 {
    Console.WriteLine(dtTime);
 }

Answer 4

change the culture and try out like this might work for you

string[] formats= { "MM/dd/yyyy HH:mm" }
var dateTime = DateTime.ParseExact("04/30/2013 23:00", 
     formats, new CultureInfo("en-US"), DateTimeStyles.None);

Check for details : DateTime.ParseExact Method (String, String[], IFormatProvider, DateTimeStyles)

Answer 5

DateTime dt1 = DateTime.ParseExact([YourDate], "dd-MM-yyyy HH:mm:ss",  
                                           CultureInfo.InvariantCulture);

Note the use of HH (24-hour clock) rather than hh (12-hour clock), and the use of InvariantCulture because some cultures use separators other than slash.

For example, if the culture is de-DE, the format "dd/MM/yyyy" would expect period as a separator (31.01.2011).

Answer 6

Below code worked for me:

string _stDate = Convert.ToDateTime(DateTime.Today.AddMonths(-12)).ToString("MM/dd/yyyy");
String format ="MM/dd/yyyy";
IFormatProvider culture = new System.Globalization.CultureInfo("fr-FR", true);
DateTime _Startdate = DateTime.ParseExact(_stDate, format, culture);

Answer 7

This can also be the problem if your string is 6/15/2019. DateTime Parse expects it to be 06/15/2019.

So first split it by slash

var dateParts = "6/15/2019"
var month = dateParts[0].PadLeft(2, '0');
var day = dateParts[1].PadLeft(2, '0');
var year = dateParts[2] 


var properFormat = month + "/" +day +"/" + year;

Now you can use DateTime.Parse(properFormat, "MM/dd/yyyy"). It is very strange but this is only thing working for me.

Answer 8

You may use this type format (get formatted data from sql server)

---

FORMAT(convert(datetime,'16/04/2018 10:52:20',103),'dd/MM/yyyy HH:mm:ss', 'en-us')

---

CONVERT(VARCHAR,convert(datetime,'16/04/2018 10:52:20',103), 120)