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Xamarin Forms Can not parse a DateTime [duplicate]

This question already has answers here:
Parse string to DateTime in C#
(9 answers)
Closed 1 year ago.
I am trying to get this date 4th April 2021 12:00 which is todays date into a DateTime object.
I am in the UK and the emulator's locale is set to GB summer time and the format looks correct in it's setting page.
I have a date as a string:
string dateTimeStr = "08-04-2021 12:00";
I have tried this:
t = DateTime.Parse(dateTimeStr);
I get a datetime object of
4th Aug 2021 12:00
How can I parse a date as a string to DateTime and be sure that the month and the day will not be swapped?

DateTime.ParseExact(dateTimeStr, "dd/MMM/yyyy hh:mm", CultureInfo.InvariantCulture);
you can use ParseExact and mention the date format as per your requirement.

How to parse a string into a date time format in C#

i have a string which contains date time this...
string S="08/18/2013 24:00:00"
DateTime DT = DateTime.ParseExact(S, "MM/dd/yyyy HH:mm:ss", null);
i want to parse it into date time but shows an exception like this.
The DateTime represented by the string is not supported in calendar System.Globalization.GregorianCalendar.
please tell me any solution for this problem.

The problem is with the hour being 24. DateTime doesn't support this, as far as I'm aware.
Options:
Use my Noda Time project which does support 24:00:00, but basically handles it by adding a day (it doesn't preserve a difference between that and "end of previous day")
Keep using DateTime, manually replace "24:00:00" with "00:00:00" when it occurs, and remember to add a day afterwards
If you want to preserve the information that it was actually "end of the day" you'd need to do that separately, and keep the information alongside the DateTime / LocalDateTime.
You should also parse with the invariant culture as other answers have suggested - you're not trying to parse a culture-specific string; you know the exact separators etc.

string S="08/18/2013 00:00:00"; // here is the first problem occurred
DateTime DT = DateTime.ParseExact(S, "MM/dd/yyyy hh:mm:ss", System.Globalization.CultureInfo.InvariantCulture);

From The "HH" Custom Format Specifier
The "HH" custom format specifier (plus any number of additional "H"
specifiers) represents the hour as a number from 00 through 23; that
is, the hour is represented by a zero-based 24-hour clock that counts
the hours since midnight.
So, using 24 as an hour is invalid on this case.
Try with hh format with 00 instead like;
string S = "08/18/2013 00:00:00";
DateTime DT = DateTime.ParseExact(S, "MM/dd/yyyy hh:mm:ss", CultureInfo.InvariantCulture);
Here a DEMO.
If you really want to use 24:00:00 as a hour, take a look Noda Time which developed by Jon.

How to Parse a DateTime String to Support 24 hours timing?

I'm trying to use DateTime.TryParseExact as below:
DateTime modifiedSinceDateTime;
var succeeded = DateTime.TryParseExact(modifiedSince, "yyyy-MM-ddThh:mm:ss",
CultureInfo.InvariantCulture,
DateTimeStyles.None,
out modifiedSinceDateTime);
but it fails with this DateTime value: 2013-06-06T22:41:20 which suggests my date time pattern is not right. I think the pattern doesn't support 24 hours timing format, only up to 12 hours
What should be the correct date pattern like?

Simple enough - change the hh to HH.
hh is for 12 hour clocks, HH for 24 hours, as can be seen in the documentation for Custom Date and Time Format Strings.

Human readable date to DateTime [duplicate]

This question already has answers here:
DateTime Conversion and Parsing DateTime.Now.ToString("MM/dd/yyyy hh:mm:ss.fff")
(3 answers)
Closed 9 years ago.
I need to convert from a "human readable" date format to DateTime, for example:
From: January 20, 2013
To: MM/dd/yyyy
Does anybody know what's the format or if there's one for doing this with DateTime.Parse and providing the format? I just want to check before jumping into a date parser.

Custom Date and Time Format Strings
MMMM dd, yyyy is a format string you're looking for.
Use DateTime.ParseExact or DateTime.TryParseExact to parse the datetime using specific format string.
After parsing you'll be able to print the value in format you want:
string input = "20, 2013";
DateTime value;
if (DateTime.TryParseExact(input, "dd, yyyy", CultureInfo.CurrentCulture, DateTimeStyles.None, out value))
{
string output = value.ToString("dd/MM/yyyy");
}

I'm not quite sure your goal, but are you trying to format your DateTime based upon which MM/dd/yyyy format that you choose?
If you are you would simply do:
DateTime.Now.ToString(MM/dd/yyy);
DateTime.Now.ToString(MMMM, MM dd, yyyy);
DateTime.Now.ToString(MMMM, MM dd, yyyy hh:mm:ss);
Essentially you have to use these:
Capital MM : Represents the Month, so MMMM (Also creates the Long Date).
Lowercase d : Will represent the day.
Lowercase y: Will represent the year.
Then the hh:mm:ss will actually add an hour, minute, second.
You can also utilize Parse to also ensure it is correctly captured.
Essentially you can easily manage or alter the Format based on whatever you require. MSDN has some great articles on this as well.
Hopefully that helps. Looks like while I was posting a few answers got generated. So your going to get some solid feedback.

Parsing a specific string to a DateTime [duplicate]

This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Parse string to DateTime in C#
I am getting date and time returned from an API as a string in the following format:
Mon Aug 13 15:04:51 -0400 2012
Does anyone have experience with how I can turn this into a DateTime?

How about
DateTime dt = DateTime.ParseExact("Mon Aug 13 15:04:51 -0400 2012",
"ddd MMM dd HH:mm:ss K yyyy",
CultureInfo.InvariantCulture)
You should read about Custom Date and Time Format Strings

Have a look at the DateTime.Parse method.
Or if you are not sure that the parsing will succeed, use the DateTime.TryParse method.
For unconventional date and time strings use the DateTime.ParseExact method.

Check these two links, I think they will be very useful to you:
string-format-datetime
Custom Date and Time Format Strings