when I pass the datetimeoffset.datetime to a SQL server stored procedure, the result get the month and date wrong way around.
E.g when I pass 11/12/2012, the result became 12/11/2012. So 11th of December was changed to twelveth of November.
Is anything I can do to find the problem?
In short: it might be because of culture settings that you need to check in your C# code and SQL Server. In Europe and US the date formatting are quit different.
For example: us default date formatting is "mm/dd/yyyy", while EU is "dd/mm/yyyy"
Here is a post that directly address this culture settings in C# - How can I get date and time formats based on Culture Info?
OK in your stored procedure you must use cast or covert to format it
read this link about cast datetime type and formats
http://msdn.microsoft.com/en-us/library/aa226054%28SQL.80%29.aspx
Related
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.
normally i parse date like this way
DateTime.Parse()
DateTime.ParseExact()
i am in situation where user run exe and pass date as argument. so user can give date with various format like
dd/MM/yyyy
MM/dd/yyyy
dd-MM-yyyy
MM-dd-yyyy
yyyyMMdd
so i have to parse that date. when date format is yyyyMMdd then i am parisng date like this way DateTime.ParseExact(this.enddate, "yyyyMMdd", CultureInfo.InvariantCulture).ToString("yyyy-MM-dd");
so guide me what code i should write to parse date which work for any date format. thanks
I would recommend that you standardize on a single format. Otherwise you will run into ambiguous dates in cases where you have dates that can be parsed by different formats, but represent different dates in both
Ex:
dd-MM-yyyy
MM-dd-yyyy
what code i should write to parse date which work for any date format
As a technical answer, you can pass multiple formats to DateTime.TryParseExact() via a string array containing all acceptable formats.
Practically, though, the others have already pointed out that there is no way to tell the difference between months and days when the format isn't strictly enforced.
One possible solution is to have the user pass the date in as three separate arguments, each flagged with some kind of indicator such as /y2013 /m11 /d12 or maybe y:2013 m:11 d:12. You can even mash them together like /y2013/m11/d12. Then you can use Regular Expressions to parse out the parts, or even just plain old string manipulation.
There's no built in way to parse dates which work for ANY format. However, you can quite easily define your own format using DateTimeFormatInfo, letting you convert more or less any format to a proper date, as long as you know the format ahead of time.
In every major website you enter the date using comboboxes for day/month/year
or some datetime widget. So I don't see a reason to use a textbox. If you really
need to, add a tooltip or a watermark with the predefined format and force the
user to it.
I'm new to MySQL and C#.
I stored certain values in a column with data type Date. I did not want the time, only the date to be stored.
On viewing these values using phpMyAdmin or MySql command line, I see them in the format:
YYYY-MM-DD
However, when I retrieve these values in to my web application, they are displayed in the following format:
YYYY-MM-DD HH:MM (the time is specifically 12:00).
Why does this happen? And how can I prevent this from happening?
when you store in C# your date field, you use DateTime object. In this object when you don't specify the time part will be put a default value depends on Globalization.
You can study how DateTime works here
You can convert the date to the format you like when you fetch the data, using date_format():
select date_format(datecol, '%Y-%m-%d')
This returns the value as a string.
You shouldn't retrieve the value as a string from mysql. Why? Because if you ever need to do any operations on that value, such as adding a day, then you will need to parse it back into a DateTime again. String parsing can be slow, and when it comes to dates they are prone to errors like misinterpretation of mm/dd/yyyy and dd/mm/yyyy formatting.
The problem you have is that .NET does not have just a Date type. It only has a DateTime type. So loading a MySQL DATE type, is going to get a DateTime with the time portion set to midnight.
There's no direct problem with that, except on how are outputting the result. If you just call .ToString() without any parameters, or you implicitly use it as a string, then you are going to get a result with the full date and time. You simply need to provide a parameter to indicate what formatting you want.
Without any parameters, you are getting the General "G" format. This is explained in the documentation here.
In other words:
yourDateTime.ToString() == yourDateTime.ToString("G")
You can read about all of the other formats available, here and here.
In particular, if you just want the date, then you probably want to do this:
yourDateTime.ToString("d")
Based on your comments, you should be doing this instead:
MySQL Query:
SELECT Gbstartdate FROM TblGbDef
C#:
DateTime gb_start_date = (DateTime) datareader[0];
Frustrating problem with DateTime, we have a section with a date picker on and if the culture is set to en-GB and the date is 01/11/2012 (dd/mm/yyyy) and then the culture is swapped to Chinese (zh-CN) the date is passed in the old culture format and when it is converted to a DateTime the datetime becomes 2012/1/11 when the culture should be (yyyy/mm/dd).
This seems to be the only culture that I have come across where the conversion is going wrong as it should be 2012/11/1 as 11 is the month.
Does anyone have any ideas why it isn't converting correctly?
Sorry guys this is my fault for not being clear enough, more detail needed.
We have a reporting form that allows users to select a date range, on that form we use use a date range picker (http://www.filamentgroup.com/lab/update_date_range_picker_with_jquery_ui/) to populate a readonly textbox that is submitted to filter the results. Users can select from a dropdown their current culture (needed for our users as they wanted to easily swap between English and Chinese without changing browser settings, If the culture is en-GB then the date range string may read "01/01/2012---01/11/2012" which is 1st January 2012 - 1st November 2012. This is stored in the url, e.g: &DateRange=01%2F01%2F2012+---+01%2F11%2F2012.
Now if the user swaps to Chinese it calls the current page with all the same query parameters but also with the culture parameter changed (we allow the culture to be overridden by an URL parameter) which means the dateformat 01/11/2012 is in the query string, when we pass this using:
DateTime.TryParse(endDateString, out endDate);
the DateTime object contains a date of 11th January 2012 instead of 1st November 2012.
Is there a way I could store the culture info that the date string is in and use that to convert to the new culture info if the culture is swapped?
Any better ideas would be greatly appreciated, swapping from en-GB to en-IN (India) seems to work fine as does swapping to es-MX (Mexico). It just seems to be chinese but that could be pot luck based on these languages date formats.
Many thanks for taking the time to read this.
DateTime.TryParse(endDateString, out endDate);
is using whatever culture is default on the server.
The basic solution would be:
var ci = GetCultureInfoFromRequest();
DateTime.TryParse(endDateString, out endDate, ci);
Use strings to move datetime around in such cases, if you are not processing datetime and just storing it.After that you can change the format before storing it in the database.
my c# program selects a datetime field from database and returns the data like the following:
21/06/2012 4:11:48 p.m.
it is not stored this way though (it's stored like 2012/06/21 15:19:10:000).
my locale is set to English/New Zealand
but when I try to save it back to database
the ISDATE() sql function doesn't like that format and just returns NULL. Do I have any options to set the time format in sql or c#? What in sql or c# is making it put "p.m."? (instead of just "PM", which by the way works)
Summing up the problem
See latest related link
You shouldn't be saving it in the database as text at all - you should be using the relevant data type such as DATETIME, and passing DateTime values from .NET to the database using SQL parameters. If you're using the right data type, the value won't actually be stored as "2012/06/21 15:19:10:000" at all. That may be how you see it in SQL Server Studio or something similar, but that doesn't mean it's the raw storage format.
Logically, a date/time doesn't have a format any more than the number ten is "10" (decimal) vs "A" (hex). Avoid string conversions as far as you can, and your life will be easier.
Note: See Jon's response about properly saving the DateTime in the database rather than a string.
For C# String formatting:
The DateTime object can output in different formats using the .ToString() function.
Please see the following links
Custom Date and Time Format Strings
DateTime.ToString Method
So, for example:
DateTime.Now.ToString("dd/MM/yyyy h:mm:ss");
That will output in the format you have in your question.
I think your issue is related to the Set language setting in sql.
Similar to this question: SQL Server ISDATE() Function - Can someone explain this?
Can you try to set your sql language to match your format?
Most of the SQL datetime formats should be recognizable by C# DateTime.Parse(youSQLDatetimeVariable). I find it a bit odd what's happening in your case.
Like other said you really shouldn't but here is how you can convert DateTime to various formats:
SELECT Convert(VARCHAR, MyDateTimeField, 112) from MyTable
That number (112 ) indicates the DateTime format that will appear as Varchar
All formats can be found here in details:
http://anubhavg.wordpress.com/2009/06/11/how-to-format-datetime-date-in-sql-server-2005/
Or within your C# code with
YourDatetimeVariable.ToString("MM-dd-yyyy")
Or whatever format you want within those quotes where MM- month number, dd - day number, yyyy - year.