I want to be able to check against the environments timezone settings and if its not a US timezone then I will handle the datetime with a more global format. For example. I have a user in America their settings is MM-DD-YYYY now if I have another user in Canada they want to see DD-MM-YYYY but instead of just giving them different versions I would rather have some logic that grabs the timezone and compares it against something and then that determines how the datetime will be handled.
if(System.TimeZone.StandardTime = US)
{
objOrderEntryItemUsageReport.VarShipDate = Convert.ToDateTime(datpkrShipDate.Value).ToString("MM/DD/YYYY");
}
else
{
objOrderEntryItemUsageReport.VarShipDate = Convert.ToDateTime(datpkrShipDate.Value).ToString("DD/MM/YYYY");
I just don't know the best way to check the environments timezone settings and even how to compare it to see if its a US timezone?
Would I need to create a dictionary with the American timezones in it and then do a while loop through that dictionary to see if the current timezone matches and if not then handle it like an international user?
The user's time zone and the user's culture are entirely separate matters.
It's not clear where this code is running, but basically you want to use the appropriate CultureInfo, and then you can use DateTime.TryParse specifying the culture. You can use TryParseExact specifying a standard format of d for "short date format". (Likewise for calls to ToString... just pass in the culture and a format of d.)
Alternatively - and preferably - use a DateTimePicker so you don't need to parse the value at all. (Given your names, it's possible that you're already using a DateTimePicker, so it's unclear why you're calling Convert.ToDateTime - the Value property is already of type DateTime.
Then, don't convert it to a string later either - your VarShipDate property shouldn't be a string property, it should be a DateTime property. That's what you're trying to represent, after all. Avoid string conversions as far as you possibly can. They are error-prone, culturally sensitive, and basically full of potential fail.
Additionally, I would strongly advise against using System.TimeZone - use System.TimeZoneInfo, which is effectively the replacement for TimeZone.
Related
DateTime.Now and DateTime.UtcNowreturns wrong value as you see in picture.
even ToUniversalTime() function result the same value.
How can I use DateTime with ignoring local time zone?
You're using a culture (looks like one of the Arabic cultures) that doesn't use the Gregorian calendar. If that's not what you want, you need to use a different culture.
If you want an invariant culture, use the invariant culture:
DateTime.Now.ToString(System.Globalization.CultureInfo.InvariantCulture)
This will produce the same string on every machine (provided the same DateTime value, of course) and can be parsed again with
DateTime.Parse("...", System.Globalization.CultureInfo.InvariantCulture)
If you don't want the formatting for persistence, just pick whatever culture works for what you're trying to do. Each culture has its own calendar, number formatting etc.
Just to make this clear, DateTime values do not have formats. The format comes from the ToString (which is called implicitly in the debugger and many other places like string.Format or <%= ... %>). ToString takes the current culture (per-thread) by default, so either change that (if it makes sense), or specify the desired culture explicitly when calling ToString (or string.Format etc.).
I have a datetime in this format "Wednesday, December 04, 2013". I want to translate it to different cultures at runtime so that i am able to store that in database according to culture.
This is my code:
dysMngmt.Day = curntDate.ToString("D");
The one line code above is getting the day.
So,please help me.
You can use the second argument of the ToString function, which enables you to pick a culture you see fit:
curntDate.ToString("D", CultureInfo.GetCultureInfo("en-US"))
As a side note, why are you saving the date in your database as a string? Why not use a native date date type? It will take less space and allow you comparisons etc., and then you'd just use the currect culture when reading it out of the database.
Unless you have a very good reason for handling the culture of each date seperatly within the application you should set this at the application level so that the default ToString() works with your intended culture.
http://support.microsoft.com/kb/306162
Also, you should probably also not store dates as text in your database.
How can I get today's date in M/d/yyyy format irrespective of system format of date using C#?
DateTime.Now.Tostring('M/d/yyyy')
is working only if the system date is in format dd/MM/yyyy or M/dd/yyyy but is not working in case yyyy-MM-dd format.
Eg:
if system date is 2013-06-26 then DateTime.Now.Tostring('M/d/yyyy') is converting the date into 06-26-2013 but not in 06/26/2013
Use CultureInfo.InvariantCulture to enforce / as date separator:
DateTime.Now.ToString("M/d/yyyy", CultureInfo.InvariantCulture)
Ideone
Looks like you just need to use CultureInfo.InvariantCulture as a second parameter in your .ToString method.
Console.WriteLine(DateTime.Now.ToString("M/d/yyyy", CultureInfo.InvariantCulture));
Using the invariant culture is the correct solution if you always want the same DateTime to produce the exact same string on multiple systems (or even on the same system due to culture changes). However, be aware that if this is user-visible, you're giving up the possibility of internationalization (for instance, if you display day or month names, they will be in English regardless of what language the user speaks). To only ensure that slashes are not replaced with another date separator, use single quotation marks:
DateTime.Now.Tostring("M'/'d'/'yyyy");
Edit:
Also, if your users are using different date formats, there's a good chance they're also using different time zones. If this DateTime needs to make sense across multiple systems, consider using DateTime.UtcNow. This will also protect you against potential bugs due to a user changing their time zone (when travelling, say) or daylight saving/summer time beginning/ending. If you're just displaying the string to the user at the current instance and not persisting it, DateTime.Now is probably what you want. In that case, however, I'd question why you're trying to mess with the format they've chosen.
Like this:
DateTime.Now.Tostring("M'/'d'/'yyyy");
The apostrofe forces the ToString() method to use the delimiter that you specified.
However, I would let the user choose a culture and use that cultures default formatting instead.
I want to convert a date in c# like 2012-06-28T14:30:00-04:00 in to "yyyyMMddTHHmm" format both dates are in string.
string currentDate="2012-06-28T14:30:00-04:00";
string requiredDate="yyyyMMddTHHmm"
When i am trying to convert this date with Convert.ToDateTime() then C# return "20120629T0000-04:00" but this is not correct date.
Have a look at the Standard Date and Time Format Strings (MSDN). I guess it might be enough to use just the ToString() method on your DateTime instances.
Possibly you might need to specify CultureInfo (MSDN here) in the appropriate overloads of the convert methods. Possibly the server and client applications are in different cultures and/or timezones.
DateTime.Parse("2012-06-28T14:30:00-04:00").ToString("yyyyMMddTHHmm") produces value you may want.
Note that changing value from absolute ISO8601 format to local ISO8601 format should be done carefully as it changes meaning of the value and often value itself.
Please make sure which of the following options you really want (and adjust code accordingly):
simply drop time from the value. Will produce semi-random time if values are coming from different time-zones.
always move value to a given timezone and make it local to that timezone.
always move value to current timezone and make it local to current timezone
Or maybe you are looking for something else altogether.
I'm not sure this is the format you are trying out
string currentDate="2012-06-28T14:30:00-04:00";
DateTime.Parse(currentDate).ToString("o")
This will give you 2012-06-29T00:00:00.0000000+05:30
Is there a way to use user's culture to localize the Range Validator for date? I am looking for a good way to validate date and avoiding to provide a fix format (e.g.: do a dd/mm/yyyy using Regular Expression Validator)
Use the Date.TryParseExact() method, consulting the documentation.
Use members of the returned My.Application.Culture.CurrentCulture.DateTimeFormat object, which is of class System.Globalization.DateTimeFormatInfo, to retrieve the date formats for the current culture (there are several formats for every culture, such as long format and short format...).
This will be something closest to what I want actually.
Getting user's language preference based on language settings:
userLanguage = Request.UserLanguages[0];
Get ShortDatePattern base on language:
new CultureInfo(userLanguage).DateTimeFormat.ShortDatePattern;
From here I will use the pattern to validate user's input and to display the required format on the page.