I have a DateTimePicker in WPF.
The dateTimePicker give me an European Format
In my DateTimePicker, i select "01/02/2014" ( in european format )
I would like to read the value, and convert it in a shortDateString with the US culture.
I have done this :
CultureInfo m_UsCulture = new CultureInfo("en-us");
string str = m_dDate.Date.ToShortDateString().ToString(m_UsCulture);
The str variable is : "01/02/2014" instead of "2/1/2014"
The ShortDateString appear to be OK, but not the "ToString(m_UsCulture);".
I would like to do this in a one line please. Have you an idea for this error ?
Thanks a lot :)
The dateTimePicker give me an European Format
That could only be true if you're using the Text property. I suggest you use the SelectedDate property, which will give you a DateTime? instead - and a DateTime doesn't have a format... it's up to you to format it however you want.
Then to convert them to US short date format, you should use ToString and specify d (for short date format) and the culture at the same time:
string str = m_dDate.Date.ToString("d", m_UsCulture);
Your current code is using DateTime.ToShortDateString() which will use the current culture, and then calling ToString on the resulting string which won't care about the culture you pass it.
ToShortDateString uses the current culture, so you can't specify your US culture with this method (unless you change the current culture). I would use ToString instead, and the US-specific short date pattern:
CultureInfo usCulture = CultureInfo.GetCultureInfo("en-us");
var stringRep = yourDate.ToString(
usCulture.DateTimeFormat.ShortDatePattern,
usCulture);
Related
I am using the code below to check the datetime and it is working fine in my machine but once after deployment, I am getting
"String was not recognized as a valid DateTime."
Please provide me the solution to work in all machine.
DateTime date1 = DateTime.Parse("16/05"); MM/dd
string todaydate = DateTime.Now.ToString("MM/dd");
if (Convert.ToDateTime(todaydate) > Convert.ToDateTime(date1.ToString("MM/dd")))
{ //Logic }
Honestly, since both answer didn't satisfied me, here is my two cent..
Let's look at your code line by line;
DateTime date1 = DateTime.Parse("16/05");
DateTime.Parse uses your CurrentCulture settings by default if don't provide any IFormatProvider as a second parameter on it's overloads. That means, if your one of standard date and time patterns of your CurrentCulture includes dd/MM (or your current culture DateSeparator since / format separator has a special meaning of replace me with current culture date separator) format, this parsing operation will be successful. That means this line might throws FormatException that depends on the current culture settings.
string todaydate = DateTime.Now.ToString("MM/dd");
DateTime.Now returns a local current time. With it's ToString() method you try to get it's string representation with MM/dd format. BUT WAIT! You used / format specifier again and still, you didn't use any IFormatProvider. Since this format specifier replace itself with current culture date separator, your todaydate might be 05/16, 05-16 or 05.16. That's totally depends on what date separator your current culture use.
Convert.ToDateTime(todaydate)
Convert.ToDateTime method uses DateTime.Parse explicitly. That means,since you didn't provide any IFormatProvider it will be use your CurrentCulture again and it's standard date and time formats. As I said, todaydate might be 05/16, 05-16 or 05.16 as a result. But there is no guarantee that your current culture parse this string successfully because it may not have MM/dd in it's standard date and time formats. If it parse "16/05" successfully, that means it has dd/MM format, in such a case, it definitely can't have MM/dd as a standard date and time format. A culture can't parse dd/MM and MM/dd formats at the same time. In such a case, it can't know that 01/02 string should parse as 2nd January or 1st February, right?
Convert.ToDateTime(date1.ToString("MM/dd"))
Same as here. As todaydate string, this will create "05/16" (it depends on current culture date separator of course) result and still there is no guarantee to parse this successfully.
And as said in comments, there is no point to parse your string to DateTime and get it's same string representation as well.
I strongly suspect you try to compare your current date is bigger than your parsed DateTime or not, you can use DateTime.Today property to compare with it. This property gets DateTime as current date part plus midnight as time part. For example;
DateTime dt;
if(DateTime.TryParseExact("16/05", "dd/MM", CultureInfo.InvariantCulture,
DateTimeStyles.None, out dt))
{
if(DateTime.Today > dt)
{
// Your operation
}
}
DateTime dt = DateTime.ParseExact("16/05", "dd/MM", CultureInfo.InvariantCulture);
if (DateTime.Today > dt)
{
// your application logic
}
DateTime dt = // From whatever source
if (DateTime.Now.Ticks > dt.Ticks)
{
// Do logic
}
C#:
I want to get date time object dependent to culture specific.
Input can be in dd/mm/yyyy or mm/dd/yyyy.
Output should be culture specific.
If input : en-US and format of string is (dd/mm/yyyy , mm/dd/yyyy)
Output should be MM/dd/yyyy
If input : en-GB format of string is (dd/mm/yyyy , mm/dd/yyyy)
Output should be dd/MM/yyyy
Please provide solution in C# and provide only when both scenarios exists in solution
I want to get date time object dependent to culture specific.
There's no such concept. Even the calendar system isn't part of DateTime. The same DateTime value is used to represent a single value regardless of culture.
However, you can specify the culture when you format a DateTime, converting it to text. For example:
DateTime dateTime = ...;
string text = dateTime.ToString("d", culture); // d = short date format
Now if your input is in either dd/MM/yyyy or MM/dd/yyyy format, then you've fundamentally got a problem. You won't know whether 06/07/2015 is July 6th or June 7th, unless you have other information to help you. Again, if you know that it's the short date format of a specific culture, then you can use
DateTime dateTime = DateTime.ParseExact(text, "d", culture);
I'm parsing a date string from a database so that I can display it in the current culture of the UI thread. For some reason, the date is not parsing with respect to the culture - specifically, I'm parsing a en-US date to switch to a es-ES date and the month/day positions are not switching.
According to this MSDN article I should just be able to use Parse with only the date string as a parameter. I should also be able to explicitly provide a culture object. Neither works and my date remains as mm/dd instead of dd/mm. I've verified that both the thread's CurrentCulture and CurrentUICulture are set properly and if I do a new DateTime, that outputs correctly.
Am I missing something?
EDIT: Nothing fancy in the code, just the .NET API.
CultureInfo culture = CultureInfo.CreateSpecificCulture(cultureName);
Thread.CurrentThread.CurrentCulture = culture;
Thread.CurrentThread.CurrentUICulture = culture;
DateTime formattedDate = DateTime.Parse("5/9/2014");
formattedDate.ToShortDateString(); //this returns 5/9/2014
DateTime.Today.ToShortDateString(); //this returns 9/5/2014
The problem you are having is that 5/9/2014 is a perfectly valid month string in either dd/mm/yyyy or mm/dd/yyyy format so when you do DateTime.Parse("5/9/2014") it will successfully parse it as 5th September 2014 (since the es-es date format is dd/mm/yyyy).
This then explains why when you output you get something different to DateTime.Today (which is obviously 9th May).
A working version of your program would be:
var outputCulture = CultureInfo.CreateSpecificCulture("es-es");
var inputCulture = CultureInfo.CreateSpecificCulture("en-us");
Thread.CurrentThread.CurrentCulture = outputCulture;
Thread.CurrentThread.CurrentUICulture = outputCulture;
DateTime formattedDate = DateTime.Parse("5/9/2014", inputCulture);
Console.WriteLine(formattedDate.ToShortDateString()); //this returns 09/05/2014
Console.WriteLine(DateTime.Today.ToShortDateString()); //this returns 09/05/2014
As you see I am specifying the culture for input so that it knows to use the en-us culture rather than the explicitly set es-es culture for parsing.
Since you are parsing a string from a database, the only way to do this correctly is to persist the string in a standard format that does not depend on any culture specific data. ISO 8601 defines formats appropriate for this and you can use a custom format string to achieve this. You can also use .Net's 'o' format specifier for round trip. See How to: Round-trip Date and Time Values for more information.
Culture specific settings do change and cause items that used to parse, to no longer be able to parse even if you know the culture that was used to format the value with to start with.
Culture specific formatting and parsing is meant to be ephemeral and to be used to interact with the user only.
I have a date that is entered through the system (from a database) as dd/mm/yy I need to programmatically convert the date to en-US format to mm/dd/yyyy so that I can do some date calculations within the code. The code that I have so far is:
String myJames = "25/04/13" // Date String comes in as non-US date
String myJames2 = System.DateTime.Today.ToString(myJames); // I think the problem is here
DateTime d1 = Convert.ToDateTime(myJames2);
DateTime d2 = DateTime.Now;
TimeSpan t = d2 - d1;
double NrOfDays = t.TotalDays;
I know this is not completely correct, especially in the first few lines. Any help getting the dates into one en-US format for effective comparisons would be greatly appreciated.
Just to check I understand your question. You have a date as a string and you want to convert that string into a datetime so you can use it in a calculation? And your problem is that the string isn't in the format that the locale the code is running in would use?
In which case use DateTime.ParseExact.
DateTime d1 = DateTime.ParseExact(myJames,"dd/MM/yy");
This line of code would replace your line declaring and assigning d1. The line assigning to myJames2 can be removed as it isn't needed.
Everytime you convert from or to a string, culturesettings are involved.
So.. if you are converting a DateTime to string, and your culture is en-US, it will automatically converted to: MM/dd/YYYY.
This is also true for converting back. If you convert a string back to a DateTime, the culturesettings are used to see what format the string is in.
Teh culture settings are always: Thread.CurrentThread.CurrentCulture.
Most conversion functions allow to override the format (like "MM/dd/yyyy") and/or the culture. So you can create your own culture and use this during conversions.
You say the database uses dd/MM/yy, but normaly a DateTime in a database is not formatted, it is just a binary value. Or is it stored as a text? If it is stored as a text, than you should ALWAYS convert it to a DateTime using the correct culture or format.
string strdate="15/06/2010";
DateTime dt =
DateTime.Parse(strdate,
System.Threading.Thread.CurrentThread.CurrentCulture.DateTimeFormat);
i cannot able to get the datetime value as dd/mm/yyyy.
it is giving exception 'string is not recognized as a valid datetime'
oly if it is in 06/15/2010 it is working. how to get the same format in dt.
Well, presumably your thread's current culture expects MM/dd/yyyy. If you want to use dd/MM/yyyy then you should specify that explicitly. Personally I prefer ParseExact instead of Parse, as that gives more control. I would use something like:
DateTime dt = DateTime.ParseExact(strdate, "dd/MM/yyyy",
CultureInfo.InvariantCulture);
Note that if this is user input, you may want to use TryParseExact instead.
You're currently using the current culture, which seems to be set up for US style date formats. Try this instead:
DateTime.Parse(strdate, System.Globalization.CultureInfo.CreateSpecificCulture("en-GB"));
This tells the function to use UK date style format which works. You might want to change the en-GB to whatever culture your dates will be in. If you have many calls where the culture is important it might also be worth to set it for the whole thread rather than call by call.