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Parsing a string to datetime in .netcore from format dd.MM.yyyy hh:mm:ss

I found similar questions, but none is covered this case.
Im trying to do follows:
string dateTime = "28.11.2020 16:08:43"
var date = DateTime.ParseExact(dateTime, "dd.MM.yyyy hh:mm:ss", CultureInfo.InvariantCulture)
but Im getting exception:
System.FormatException: String '28.11.2020 16:08:43' was not recognized as a valid DateTime.
at System.DateTime.ParseExact(String s, String format, IFormatProvider provider)

You're using hh in your format string, which means "hour of halfday, in the range 1-12". You want HH, which means "hour of day, in the range 0-23". The actual value (16) isn't in the range 1-12, hence the error.
Any time you run into date/time formatting or parsing issues, it's worth checking your date/time format very, very carefully against the documentation.

ParseExact inverse my day and month

my code below throw an exception as invalid date time. the error occur after i publish it to my server. working find at my developing PC
string str = "27-07-2015 6:15 pm";
DateTime dt = Convert.ToDateTime(DateTime.ParseExact(str, "dd-MM-yyyy h:mm tt", null).ToString("dd-MM-yyyy hh:mm tt"));
it takes '27' as month and '7' as day.
what i did to solve the problem:
i already update the datetime format on that server to dd-MM-yyyy
i double checked the capital and small letter of the date time format.
change the 'null' to 'CultureInfo.InvariantCulture'
change 'pm' to 'PM', 'tt' to 'TT'
read through all the resources i could find on google and stackoverflow, nothing's help.
am i missing something here? i know i did... :(

As #Rawling correctly noted, you're parsing the datetime twice: first, using your custom formatting, and second, using the system's default formatting.
This is silly - you already have the DateTime from the ParseExact method:
string str = "27-07-2015 6:15 pm";
var dt = DateTime.ParseExact(str, "dd-MM-yyyy h:mm tt", null);
That's it, you're done. No need to convert to string again, and parse that once more (and even worse, using the same custom formatting to do the ToString, so the subsequent Convert.ToDateTime is bound to fail anywhere that's not the default datetime formatting).

There are a few possibilities;
Let's analyze your DateTime.ParseExact(str, "dd-MM-yyyy h:mm tt", null) part first. This will be parsed your 27-07-2015 6:15 pm string successfully if;
Your CurrentCulture's TimeSeparator is : and
Your CurrentCulture's PMDesignator is PM (not empty string)
If both are okey, you have successfully parsed a DateTime.
After that, you generate it's textual representation with dd-MM-yyyy hh:mm tt format. And that's still depends on your CurrentCulture, your result might have PM or not. For both case, there is no guaranteed to parse your string with Convert.ToDateTime method because it will be parsed your string only if it is a standard date and time format of your CurrentCulture.
On the other side, what you do doesn't make sense to me. You parse your string first, then you generate string representation of it, then you try to parse this string again. Doesn't make sense, right?
I strongly suspect you just need;
string str = "27-07-2015 6:15 pm";
DateTime dt = DateTime.ParseExact(str, "dd-MM-yyyy h:mm tt", CultureInfo.InvariantCulture);

Can not Parse string to DateTime in Windows Phone 7

I am trying to convert the string to DateTime. But I can not convert.
DateTime dt = DateTime.Parse("16/11/2014", CultureInfo.InvariantCulture);
Console.WriteLine("Date==> " + dt);
The error is FormatException.
My input time format is "dd/MM/yyyy".
Please let me any idea to resolve my problem.

Given that you know your input format, you should specify it with `ParseExact:
DateTime dt = DateTime.ParseExact(text, "dd/MM/yyyy",
CultureInfo.InvariantCulture);
I would always recommend being as explicit as you can be about date/time formats. It makes your intention very clear, and avoids the possibility of getting months and days the wrong way round.
As Soner has stated, CultureInfo.InvariantCulture uses MM/dd/yyyy as its short date pattern, as you can validate with:
Console.WriteLine(CultureInfo.InvariantCulture.DateTimeFormat.ShortDatePattern)
As a mild plug, you might want to consider using my Noda Time project for your date/time handling - aside from anything else, that allows you to treat a date as a date, rather than as a date and time...

Because InvariantCulture doesn't have dd/MM/yyyy as a standard date and time format, but it has MM/dd/yyyy as a standard date and time format.
That's why it thinks your string is MM/dd/yyyy format, but since there is no 16 as a month in Gregorian calender, you get FormatException.
Instead of that, you can use DateTime.TryParseExact method to specify exact format like;
string s = "16/11/2014";
DateTime dt;
if(DateTime.TryParseExact(s, "dd/MM/yyyy", CultureInfo.InvariantCulture,
DateTimeStyles.None, out dt))
{
}

Convert HH:MM:ss string into datetime

I am reading from excel file and save the content into database
one of the column contains length of video in this format
HH:mm:ss
I write this code so far
string time = oledbReader[6].ToString();
DateTime streamingTime = DateTime.ParseExact(time,
"HH:mm:ss",
System.Globalization.CultureInfo.CurrentCulture);
I am getting error:
String was not recognized as a valid DateTime.
I tried debug mode and I see the value :"30/12/1899 00:09:21" in the Variable time
when the value in the current execl column is:"00:09:21"
Where does the "30/12/1899" came from? Why is the string was not recognized as a valid DateTime?
Can I save only the format HH:mm:ss into sql server?

Try this, easy hack as my comment above.
string time = oledbReader[6].ToString().Split(" ".ToCharArray())[1];
DateTime streamingTime = DateTime.ParseExact(time, "HH:mm:ss",System.Globalization.CultureInfo.CurrentCulture);
or you could parse it as it is...
DateTime streamingTime = DateTime.ParseExact(time, "dd/MM/yyyy HH:mm:ss", System.Globalization.CultureInfo.CurrentCulture);

Since you didn't gave us any information about your CultureInfo, here with InvariantCulture;
string time = "30/12/1899 00:09:21";
DateTime streamingTime = DateTime.ParseExact(time, "dd/MM/yyyy HH:mm:ss", CultureInfo.InvariantCulture);
Console.WriteLine(streamingTime);
Output will be;
12/30/1899 12:09:21 AM
Here a DEMO.
For more informations, check out Custom Date and Time Format Strings

Use a TimeSpan structure to hold a time value. A DateTime includes both a date and a time.

The problem is that excel not have time field and automatically convert time to date time field.
If course date is "empty" which means that it its a minimal date for excel - 30/12/1899
Moreover you don't have to invoke ToString methods because object is already a DateTime

Converting dd/mm/yyyy formatted string to Datetime [duplicate]

This question already has answers here:
Converting a String to DateTime
(17 answers)
Closed 9 years ago.
I am new to DotNet and C#. I want to convert a string in mm/dd/yyyy format to DateTime object. I tried the parse function like below but it is throwing a runtime error.
DateTime dt=DateTime.Parse("24/01/2013");
Any ideas on how may I convert it to datetime?

You need to use DateTime.ParseExact with format "dd/MM/yyyy"
DateTime dt=DateTime.ParseExact("24/01/2013", "dd/MM/yyyy", CultureInfo.InvariantCulture);
Its safer if you use d/M/yyyy for the format, since that will handle both single digit and double digits day/month. But that really depends if you are expecting single/double digit values.
Your date format day/Month/Year might be an acceptable date format for some cultures. For example for Canadian Culture en-CA DateTime.Parse would work like:
DateTime dt = DateTime.Parse("24/01/2013", new CultureInfo("en-CA"));
Or
System.Threading.Thread.CurrentThread.CurrentCulture = new CultureInfo("en-CA");
DateTime dt = DateTime.Parse("24/01/2013"); //uses the current Thread's culture
Both the above lines would work because the the string's format is acceptable for en-CA culture. Since you are not supplying any culture to your DateTime.Parse call, your current culture is used for parsing which doesn't support the date format. Read more about it at DateTime.Parse.
Another method for parsing is using DateTime.TryParseExact
DateTime dt;
if (DateTime.TryParseExact("24/01/2013",
"d/M/yyyy",
CultureInfo.InvariantCulture,
DateTimeStyles.None,
out dt))
{
//valid date
}
else
{
//invalid date
}
The TryParse group of methods in .Net framework doesn't throw exception on invalid values, instead they return a bool value indicating success or failure in parsing.
Notice that I have used single d and M for day and month respectively. Single d and M works for both single/double digits day and month. So for the format d/M/yyyy valid values could be:
"24/01/2013"
"24/1/2013"
"4/12/2013" //4 December 2013
"04/12/2013"
For further reading you should see: Custom Date and Time Format Strings

use DateTime.ParseExact
string strDate = "24/01/2013";
DateTime date = DateTime.ParseExact(strDate, "dd/MM/yyyy", null)
DateTime.ParseExact
null will use the current culture, which is somewhat dangerous. Try to supply a specific culture
DateTime date = DateTime.ParseExact(strDate, "dd/MM/yyyy", CultureInfo.InvariantCulture)

You can use "dd/MM/yyyy" format for using it in DateTime.ParseExact.
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("24/01/2013", "dd/MM/yyyy", CultureInfo.InvariantCulture);
Here is a DEMO.
For more informations, check out Custom Date and Time Format Strings