An api im using is providing me a date. This date is of type string and is presented in the format:
Mon Nov 16 19:15:09 +0000 2009
DateTime.TryParse() fails when this value is provided. Can anyone point me in the right direction?
Using the DateTimeOffset class in order to handle the offset.
[TestMethod]
public void test()
{
string s = "Mon Nov 16 19:15:09 +0000 2009";
var result = DateTimeOffset.ParseExact(
s,
"ddd MMM dd HH:mm:ss zzz yyyy",
System.Globalization.CultureInfo.InvariantCulture);
Assert.AreEqual(16, result.Day);
Assert.AreEqual(11, result.Month);
Assert.AreEqual(2009, result.Year);
Assert.AreEqual(19, result.Hour);
Assert.AreEqual(15, result.Minute);
Assert.AreEqual(9, result.Second);
Assert.AreEqual(0, result.Offset.Hours);
}
Change the offset in the string - e.g. '0600' and then change the offset assertion to match, it'll work.
You can then convert this into a DateTime if you have to - but you lose the offset information; so you have to decide whether you're going to keep it as the original local time (19:15:09), or if you're going to convert to some standard time (e.g. 13:19:05 UTC if offset is +06:00).
It gets interesting if you need to convert that to your own local time - because it would depend on what DST rules were in place in 2009 at that time of the year - that can cause a real headache!
So, if you're going to DateTime I recommend converting to universal time and then go from there. Add this to the test:
Console.WriteLine(result);
//little bit long winded - but you need the 'Universal' Kind for reliability
Console.WriteLine(
DateTime.SpecifyKind(
new DateTime(result.ToUniversalTime().Ticks),
DateTimeKind.Utc)
);
This outputs:
11/16/2009 19:15:09 +06:00
11/16/2009 13:15:09
Try DateTime.TryParseExact passing a suitable format string.
Because the DateTime.TryParse(String, DateTime) method tries to parse the string representation of a date and time using the formatting rules of the current culture, trying to parse a particular string across different cultures can either fail or return different results. If a specific date and time format will be parsed across different locales, use the DateTime.TryParse(String, IFormatProvider, DateTimeStyles, DateTime) method or one of the overloads of the TryParseExact method and provide a format specifier.
One of the TryParse methods accepts an IFormatProvider, which can also come as a DateTimeFormatInfo class. The following link has all the necessary details:
http://msdn.microsoft.com/en-us/library/system.globalization.datetimeformatinfo.aspx
Yours would be almost like: ddd, MMM dd yyyy HH':'mm':'ss zzz yyyy
The only problem is the timezone offset, zzz includes a colon between the hours and minutes. You might get away with using zz'00' though it is cheating.
Related
I'm trying to Parse Mon, 11 Mar 2019 09:13:16 +0100 to 2019-03-11T09:13:16
string dataa = "Mon, 11 Mar 2019 09:13:16 +0100";
DateTime d = new DateTime();
d = DateTime.ParseExact(dataa,"yyyy-MM-ddTHH:mm:ss", System.Globalization.CultureInfo.InvariantCulture);
Console.WriteLine("data: "+d);
But the error is:
String was not recognized as a valid DateTime.
Is there any method to do this parsing automatically? Thanks to everyone.
update
As mentioned below, like the other users replied to me, I needed the function ToString(String, IFormatProvider) in the first place.
When you use ParseExact, your string and format should match exactly.
The proper format is: ddd, d MMM yyyy hh:mm:ss zzz (or HH which depends on your hour format)
After you parse it, you need to use ToString to format it with yyyy-MM-dd'T'hh:mm:ss format (or HH which depends you want 12-hour clock or 24-hour clock format)
I think I have to add little bit more explanation that a lot of people confuse (specially who are beginner about programming). A DateTime instance does not have any format. It just have date and time values which is basicly a numeric value called Ticks. When you talk about "format" concept, that points to textual representation which is string.
Since you said "Mon, 11 Mar 2019 09:13:16 +0100 to 2019-03-11T09:13:16", I (and probably a lot of people also) assume that you have a string as Mon, 11 Mar 2019 09:13:16 +0100 and you want to get 2019-03-11T09:13:16 as a string from it. For that, you need to parse your string to DateTime first. For that, as you do, ParseExact is one option.
When you parse it to DateTime, you get it's textual representation, which is string, with ToString method. This method have a few overloads and you should use ToString(String, IFormatProvider) overload. With that, you specify your output format as a first parameter, and your culture info as a second parameter which it might effect on your result string because of the : and / format specifiers since they can change based on the current culture or supplied culture.
Further reading: Custom Date and Time Format Strings
You need to specify the format that the input data has (the second parameter of DateTime.ParseExact). In your case, the data you provide has the format ddd, d MMM yyyy hh:mm:ss zzz. Also, in the last line, where you print the result you have to format it.
So, this is how you have to do it:
string dataa = "Mon, 11 Mar 2019 09:13:16 +0100";
DateTime d = new DateTime();
d = DateTime.ParseExact(dataa, "ddd, d MMM yyyy hh:mm:ss zzz", System.Globalization.CultureInfo.InvariantCulture);
Console.WriteLine("data: " + d.ToString("yyyy-MM-dd'T'hh:mm:ss"));
As title suggests, what I want to do is to convert my date-string e.g.
"6/6/2014 12:24:30 PM" (M/d/yyyy h:mm:ss tt) format
to
"YYYY-MM-DDThh:mm:ss.SSSZ" format.
I am trying in the following way. It's not giving me any exception, but I am getting the value like :
"YYYY-06-DDT12:24:30.SSSZ"
How can I exactly achieve this?
string LastSyncDateTime = "6/6/2014 12:24:30 PM";
DateTime dt = DateTime.ParseExact(LastSyncDateTime, "M/d/yyyy h:mm:ss tt",CultureInfo.InvariantCulture);
string result = dt.ToString("YYYY-MM-DDThh:mm:ss.SSSZ");
Data time Formats Can't recognize, the non Case sensitive chars in some systems due to their internal settings. Please refer the below code, which works fine
string result = dt.ToString("yyyy-MM-ddThh:mm:ss.SSSZ");
The above code will result as 2014-06-06T12:24:30.SSSZ
EDIT :
The below snippet will give you milliseconds as well
dt.ToString("yyyy-MM-ddThh:mm:ss.fffZ");
The simplest way is to use the "o" date formatter, like this:
dt.ToString("o");
This method will give you a timestring in the ISO 8601 format, something like this:
2014-12-25T11:56:54.9571247Z
but, since that ISO 8601 uses more than 3 decimal digits to define the second, if you only want to stop at milliseconds you can use the full formatting string and write down ss.fffzzz at the end, like this:
dt.ToString("yyyy-MM-ddThh:mm:ss.fffzzz");
and the result will be:
2014-12-25T11:56:54.957Z
For more informations you can refer to THIS LIST of date formatting options.
but I am getting the value like "YYYY-06-DDT12:24:30.SSSZ"
Let me explain why you get this result. Since there is no custom date and time format as YYYY, DD, SSS or Z, these characters are copied to the result string unchanged.
I strongly suspect you want to use yyyy, dd, fff and z format specifiers instead.
You can use DateTime.TryParseExact method like;
string s = "6/6/2014 12:24:30 PM";
DateTime dt;
if(DateTime.TryParseExact(s, "M/d/yyyy hh:mm:ss tt",
CultureInfo.InvariantCulture,
DateTimeStyles.None, out dt))
{
Console.WriteLine(dt.ToString("yyyy-MM-ddThh:mm:ss.fffz"));
}
Here a demonstration on Ideone.
Result will be 2014-06-06T12:24:30.000+3 on my machine because my time zone is UTC +3 right now. Time zone information might change based on your UTC value as well.
Try this -
dt.ToString("o");
dt.ToString("O");
you can see this link
hope this helps
You can use date in this format :("yyyy-MM-ddThh:mm:ss.000Z")
Or in manually by changing the time zone you can easily use the date set time zone to (GMT:000(Greenwich mean time)) in your setting tab and make sure data type is date/time.
Use yyyy for Year and dd for date
string result = dt.ToString("yyyy-MM-ddThh:mm:ss.SSSZ");
Here is the quick solution:
DateTime.UtcNow.ToString("yyyy-MM-ddThh:mm:ss.fffZ")
I need help to convert current date to "Tue Nov 4 00:00:00 UTC+0530 2014" date format
using C#.
Say I have date like : DateTime dt = DateTime.Now;
Now, how can I convert it in mentioned format.
DateTime.ToString(string) allows you to specify a format for your date. You can construct a custom format using Custom Date and Time Format Strings.
I feel like taking risk to answer your question but anyway..
A DateTime doesn't have any implicit format. It just have date and time values etc.. That's why it is not possible to have any format. But string representations of them can have a format. Formatting a DateTime is easy, just need to use DateTime.ToString() method with a specific culture. (In your case looks like InvariantCulture is a good candidate)
DateTime dt = DateTime.Now;
dt.ToString("ddd MMM d HH:mm:ss 'UTC+0530' yyyy", CultureInfo.InvariantCulture);
returns
Tue Nov 4 14:20:36 UTC+0530 2014
AFAIK, time zone abbreviations are not standardized and that's why there is way to parse them besides literal string delimiter. Also since a DateTime doesn't keep offset value, you need also parse it as a literal string delimiter
If you would want to +05:30 instead +0530 as a result, "zzz" custom format specifier would be a nice choice since it gets + or - sign, hours and minutes part offset of local operating system's time zone from UTC.
Based upon your suggestions, I build this code
DateTimeOffset localTime = DateTimeOffset.Now;
string.Format("{0:ddd MMM d HH:mm:ss} UTC+{1} {0:yyyy}", localTime, localTime.Offset.ToString("hhmm"));
and its generating correct format:
"Tue Nov 4 18:25:48 UTC+0530 2014"
I have the following datetime string as returned to me by the Twitter API:
"Thu Apr 26 11:38:36 +0000 2012"
I need to convert this to a DateTime object so I call ParseExact with a custom format specifier:
CultureInfo provider = CultureInfo.InvariantCulture;
DateTime publishDate = DateTime.ParseExact(tweet["created_at"].ToString(), "ddd MMM dd hh:mm:ss zzz yyyy", provider);
However, this raise a FormatException exception for any variant of z, zz or zzz for the time zone:
String was not recognized as a valid DateTime.
Looking at the MSDN documentation it's clear that that format specifier is expecting the time zone to be in the format zz:zz where there is a colon in the time zone to delimit the hours and minutes.
I've checked other questions on Stack Overflow like:
How do I parse and convert DateTime’s to the RFC 822 date-time format?
Parsing an RFC822-Datetime in .NETMF 4.0
and none of them really help.
Is there a time zone specifier I can use that will correctly parse this format?
Really silly this one.
The problem was the hour specifier. I'd used "hh" which is for 12 hour clock times. For 24 hour times I should have used "HH".
Note the subtle difference.
Changing that it all works as expected.
I'm trying to specify the timezone on a string that I am passing to DateFormat.parse. We're currently using .net framework 2.0. Current code is
DateTimeFormatInfo DATE_FORMAT = CultureInfo.CurrentCulture.DateTimeFormat;
DateTime first = DateTime.Parse("Wed, 31 Oct 2007 8:00:00 -5", DATE_FORMAT);
But then when I do first.ToString("r"), the result is
Wed, 31 Oct 2007 09:00:00 GMT
What am I doing wrong? I also tried using DateTime.SpecifyKind method to set my DateTime object's Kind to Local, but it seems like you would need to specify the kind as local before you parse the string, if the timezone is part of the string.
My local timezone is EDT, that's what I'm ultimately trying to get this date to.
Edit - our solution:
input :
DateTime first = DateTime.SpecifyKind(DateTime.Parse("OCT 31, 2007 8:00 AM", DATE_FORMAT), DateTimeKind.Local);
output :
first.ToLocalTime().ToString("our format")
Still haven't found a way to get time zone abbreviation, like 'EDT'.
Use the ToLocalTime() method before calling ToString().
first.ToLocalTime().ToString();
You can use the "zz" or "zzz" date formats to give you -5 or -5:00.
When you call first.ToString("r"),
Here is what based on MSDN
Represents a custom date and time
format string defined by the
DateTimeFormatInfo..::.RFC1123Pattern
property. The pattern reflects a
defined standard and the property is
read-only. Therefore, it is always the
same, regardless of the culture used
or the format provider supplied. The
custom format string is "ddd, dd MMM
yyyy HH':'mm':'ss 'GMT'".
You can pass the defined format information into ToString, try to call this method
DateTime..::.ToString Method (IFormatProvider)
Instead, and pass your DateTimeFormatInfo object.
Have a look at the DateTimeOffset struct, I think this is what you need.
Try using ParseExact() - you can specify what goes where.
In your case, you can parse it with:
string str = "Wed, 31 Oct 2007 8:00:00 -5";
string fmt = "ddd, dd MMM yyyy H:mm:ss z";
DateTime d = DateTime.ParseExact(str, fmt, null);
Console.WriteLine(d);