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  • Use Extension Methods to find first and last day of the month

    - by Tim Hibbard
    A lot of reports work on data from last month.  It is a nice touch to have these dates pre-populated for your users.  Using extension methods, the code can look cleaner too. Extension Methods: public static class DateHelper { public static DateTime FirstOfTheMonth(this DateTime dt) { return new DateTime(dt.Year, dt.Month, 1); }   public static DateTime LastOfTheMonth(this DateTime dt) { return dt.FirstOfTheMonth().AddMonths(1).AddDays(-1); } } Consuming Code: void Prepopulate() { startDateBox.CurrentlySelectedDate = DateTime.Now.AddMonths(-1).FirstOfTheMonth(); endDateBox.CurrentlySelectedDate = DateTime.Now.AddMonths(-1).LastOfTheMonth(); }

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  • Determine Last Modification Datetime for an Azure Table

    - by embeddedprogrammer
    I am developing an application which may be hosted on a microsoft sql server, or on Azure SQL, depending upon the end user's wishes. My whole system works fine with the exception of some WCF functions which determine the last modification time of tables using the following technique: SELECT OBJECT_NAME(OBJECT_ID) as tableName, last_user_update as lastUpdate FROM mydb.sys.dm_db_index_usage_stats This query fails in Azure. Is there any analogous way to get table last modification dates from Azure's sql?

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  • rails howto compare datetime ?

    - by fenec
    hello, i have games in my sqLite DB with the attribute starting_date( t.date :starting_date). i would like to know all the games that have alreday started so i am using this lines of code: Game.find :all,:conditions=>"starting_date <= #{Date.today}" Game.find_by_sql("SELECT * FROM "games" WHERE (created_at < 2010-05-13)") the result is nill,even though i know that i have games that have already started like this one : #<Game id: 1, team_1_id: 2, team_2_id: 1, status: 2, team_1_points: nil, team_2_points: nil, starting_date: "2010-05-05", winner: 1, sport: "football", country: nil, league: "calcio", created_at: "2010-04-07 00:09:21", updated_at: "2010-05-13 00:57:19"> what am i doing wrong here?

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  • Get the count of login datetime and username from the textfile

    - by user2897388
    I am having a textfile with usename, userid, login and logout time. From this textfile I need to get the userid and howmany times that user logged in on that particular date. I am doing this one using C# (.NET) in windows applications. I tried this code but I am getting the whole text into the string strRead. In that strRead I need to get the count of user login basing on date. StreamReader strmrdr = new StreamReader("Logfiles.txt"); string strRead = strmrdr.ReadToEnd(); Username:Rajini||UserId:abc||Userlogintime:10/19/13 12:33:29 PM||UserLogoutTime:10/19/13 12:33:57 PM Username:Rajini||UserId:abc||Userlogintime:10/19/13 12:35:29 PM||UserLogoutTime:10/19/13 12:36:57 PM

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  • DateTime Formatting in repeater

    - by Krishna
    Hi, I am trying to format the date time (yyyy/MM/dd) in a repeater which is binded to an ObjectDataSource as shown (THIS WORKS) <%# ((MyType)Container.DataItem).CreateDateTime.ToString("yyyy/MM/dd")% (THIS DOES`NT WORKS) <%# String.Format("{0:yyyy/MM/dd}",((MyType)Container.DataItem).UpdateDateTime)% I want to have both things working because sometimes the property UpdateDateTime is null, in such cases the second line of code handles smart. Thank you for the help in advance.

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  • SQL Query: How to determine "Seen during N hour" if given two DateTime time stamps?

    - by efess
    Hello all. I'm writing a statistics application based off a SQLite database. There is a table which records when users Login and Logout (SessionStart, SessionEnd DateTimes). What i'm looking for is a query that can show what hours user have been logged in, in sort of a line graph way- so between the hours of 12:00 and 1:00AM there were 60 users logged in (at any point), between the hours of 1:00 and 2:00AM there were 54 users logged in, etc... And I want to be able to run a SUM of this, which is why I can't bring the records into .NET and iterate through them that way. I've come up with a rather primative approach, a subquery for each hour of the day, however this approach has proved to be slow and slow. I need to be able to calculate this for a couple hundred thousand records in a split second.. SELECT case when (strftime('%s',datetime(date(sessionstart), '+0 hours')) > strftime('%s',sessionstart) AND strftime('%s',datetime(date(sessionstart), '+0 hours')) < strftime('%s',sessionend)) OR (strftime('%s',datetime(date(sessionstart), '+1 hours')) > strftime('%s',sessionstart) AND strftime('%s',datetime(date(sessionstart), '+1 hours')) < strftime('%s',sessionend)) OR (strftime('%s',datetime(date(sessionstart), '+0 hours')) < strftime('%s',sessionstart) AND strftime('%s',datetime(date(sessionstart), '+1 hours')) > strftime('%s',sessionend)) then 1 else 0 end as hour_zero, ... hour_one, ... hour_two, ........ hour_twentythree FROM UserSession I'm wondering what better way to determine if two DateTimes have been seen durring a particular hour (best case scenario, how many times it has crossed an hour if it was logged in multiple days, but not necessary)? The only other idea I had is have a "hour" table specific to this, and just tally up the hours the user has been seen at runtime, but I feel like this is more of a hack than the previous SQL. Any help would be greatly appreciated!

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  • SQL Server Date Comparison Functions

    - by HighAltitudeCoder
    A few months ago, I found myself working with a repetitive cursor that looped until the data had been manipulated enough times that it was finally correct.  The cursor was heavily dependent upon dates, every time requiring the earlier of two (or several) dates in one stored procedure, while requiring the later of two dates in another stored procedure. In short what I needed was a function that would allow me to perform the following evaluation: WHERE MAX(Date1, Date2) < @SomeDate The problem is, the MAX() function in SQL Server does not perform this functionality.  So, I set out to put these functions together.  They are titled: EarlierOf() and LaterOf(). /**********************************************************                               EarlierOf.sql   **********************************************************/ /**********************************************************   Return the later of two DATETIME variables.   Parameter 1: DATETIME1 Parameter 2: DATETIME2   Works for a variety of DATETIME or NULL values. Even though comparisons with NULL are actually indeterminate, we know conceptually that NULL is not earlier or later than any other date provided.   SYNTAX: SELECT dbo.EarlierOf('1/1/2000','12/1/2009') SELECT dbo.EarlierOf('2009-12-01 00:00:00.000','2009-12-01 00:00:00.521') SELECT dbo.EarlierOf('11/15/2000',NULL) SELECT dbo.EarlierOf(NULL,'1/15/2004') SELECT dbo.EarlierOf(NULL,NULL)   **********************************************************/ USE AdventureWorks GO   IF EXISTS       (SELECT *       FROM sysobjects       WHERE name = 'EarlierOf'       AND xtype = 'FN'       ) BEGIN             DROP FUNCTION EarlierOf END GO   CREATE FUNCTION EarlierOf (       @Date1                              DATETIME,       @Date2                              DATETIME )   RETURNS DATETIME   AS BEGIN       DECLARE @ReturnDate     DATETIME         IF (@Date1 IS NULL AND @Date2 IS NULL)       BEGIN             SET @ReturnDate = NULL             GOTO EndOfFunction       END         ELSE IF (@Date1 IS NULL AND @Date2 IS NOT NULL)       BEGIN             SET @ReturnDate = @Date2             GOTO EndOfFunction       END         ELSE IF (@Date1 IS NOT NULL AND @Date2 IS NULL)       BEGIN             SET @ReturnDate = @Date1             GOTO EndOfFunction       END         ELSE       BEGIN             SET @ReturnDate = @Date1             IF @Date2 < @Date1                   SET @ReturnDate = @Date2             GOTO EndOfFunction       END         EndOfFunction:       RETURN @ReturnDate   END -- End Function GO   ---- Set Permissions --GRANT SELECT ON EarlierOf TO UserRole1 --GRANT SELECT ON EarlierOf TO UserRole2 --GO                                                                                             The inverse of this function is only slightly different. /**********************************************************                               LaterOf.sql   **********************************************************/ /**********************************************************   Return the later of two DATETIME variables.   Parameter 1: DATETIME1 Parameter 2: DATETIME2   Works for a variety of DATETIME or NULL values. Even though comparisons with NULL are actually indeterminate, we know conceptually that NULL is not earlier or later than any other date provided.   SYNTAX: SELECT dbo.LaterOf('1/1/2000','12/1/2009') SELECT dbo.LaterOf('2009-12-01 00:00:00.000','2009-12-01 00:00:00.521') SELECT dbo.LaterOf('11/15/2000',NULL) SELECT dbo.LaterOf(NULL,'1/15/2004') SELECT dbo.LaterOf(NULL,NULL)   **********************************************************/ USE AdventureWorks GO   IF EXISTS       (SELECT *       FROM sysobjects       WHERE name = 'LaterOf'       AND xtype = 'FN'       ) BEGIN             DROP FUNCTION LaterOf END GO   CREATE FUNCTION LaterOf (       @Date1                              DATETIME,       @Date2                              DATETIME )   RETURNS DATETIME   AS BEGIN       DECLARE @ReturnDate     DATETIME         IF (@Date1 IS NULL AND @Date2 IS NULL)       BEGIN             SET @ReturnDate = NULL             GOTO EndOfFunction       END         ELSE IF (@Date1 IS NULL AND @Date2 IS NOT NULL)       BEGIN             SET @ReturnDate = @Date2             GOTO EndOfFunction       END         ELSE IF (@Date1 IS NOT NULL AND @Date2 IS NULL)       BEGIN             SET @ReturnDate = @Date1             GOTO EndOfFunction       END         ELSE       BEGIN             SET @ReturnDate = @Date1             IF @Date2 > @Date1                   SET @ReturnDate = @Date2             GOTO EndOfFunction       END         EndOfFunction:       RETURN @ReturnDate   END -- End Function GO   ---- Set Permissions --GRANT SELECT ON LaterOf TO UserRole1 --GRANT SELECT ON LaterOf TO UserRole2 --GO                                                                                             The interesting thing about this function is its simplicity and the built-in NULL handling functionality.  Its interesting, because it seems like something should already exist in SQL Server that does this.  From a different vantage point, if you create this functionality and it is easy to use (ideally, intuitively self-explanatory), you have made a successful contribution. Interesting is good.  Self-explanatory, or intuitive is FAR better.  Happy coding! Graeme

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  • Plot numpy datetime64 with matplotlib

    - by enedene
    I have two numpy arrays 1D, one is time of measurement in datetime64 format, for example: array([2011-11-15 01:08:11, 2011-11-16 02:08:04, ..., 2012-07-07 11:08:00], dtype=datetime64[us]) and other array of same length and dimension with integer data. I'd like to make a plot in matplotlib time vs data. If I put the data directly, this is what I get: plot(timeSeries, data) Is there a way to get time in more natural units? For example in this case months/year would be fine.

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  • Sharepoint xsl ddwrt FormatDateTime issue

    - by mahumba
    I use the ddwrt:FormatDateTime function to format the output like yyyyMMdd. inputs like 01/01/2010 work fine but when the day gets over the number 12 the output is an emtpy string. ddwrt:FormatDate(string(@myDate), 1033, 'yyyyMMdd') At first I thought it could be a language specific problem but even none of those combinations work: 13/01/2010 01/13/2010 13.01.2010

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  • Formatting a date string when the string sits inside another string

    - by sf
    Hi, I'm trying to figure out a way to format a date string that sits inside string using javascript. The string can be: "hello there From 2010-03-04 00:00:00.0 to 2010-03-31 00:00:00.0" or "stuff like 2010-03-04 20:00:00.0 and 2010-03-31 00:00:02.0 blah blah" I'd like it to end up like: "stuff like 4 March 2010 and 31 March 2010 blah blah" Does anyone have any idea as to how this could be achieved?

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  • TextBoxFor default value empty

    - by Luca Romagnoli
    I have this textbox: <%: Html.TextBoxFor(model = model.DataFine, new { @class = "calendar" })% If datafine is null in the textbox appears 00/00/0000 00:00. i don't want it. I want a empty string. and if datafine isn't null i want the date that is saved. thanks

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  • Win32: GetDateFormat and GetTimeFormat exist. GetDateTimeFormat?

    - by Ian Boyd
    i know Win32 has the Nls function GetDateFormat, e.g.: GetDateFormat(…, …, …, "dddd','MM','y", …, …); and it has GetTimeFormat, e.g.: GetTimeFormat(…, …, …, "tt ss':'hh':'mm", …, …); But there a way to format both at once, e.g.: GetDateTimeFormat(…, …, …, "tt dddd' - 'ss':'y';'hh':'mm MM", …, …); Note: The format string is intentionally constructed to demonstrate that not all format strings are linearly seperable.

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  • Sharepoint DateTimeControl: set it to null

    - by pistacchio
    Hi, how can I set the selected value of a Sharepoint DateTimeControl to null? When you first load it into a page, there's no value selected (even if the returned value is not properly null but one can check it with IsDateEmpty). How can i programmatically set it back to the initial, empty value? Thanks

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  • Getting current culture day names in .NET

    - by cxfx
    Is it possible to get the CurrentCulture's weekdays from DateTimeFormatInfo, but returning Monday as first day of the week instead of Sunday. And, if the current culture isn't English (i.e. the ISO code isn't "en") then leave it as default. By default CultureInfo.CurrentCulture.DateTimeFormat.DayNames returns: [0]: "Sunday" [1]: "Monday" [2]: "Tuesday" [3]: "Wednesday" [4]: "Thursday" [5]: "Friday" [6]: "Saturday" But I need: [0]: "Monday" [1]: "Tuesday" [2]: "Wednesday" [3]: "Thursday" [4]: "Friday" [5]: "Saturday" [6]: "Sunday"

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  • PHP, Codeigniter: How to Set Date/Time based on users timezone/location globally in a web app?

    - by Abs
    Hello all, I have just realised if I add a particular record to my MySQL database - it will have a date/time of the server and not the particular user and where they are located which means my search function by date is useless! As they will not be able to search by when they have added it in their timezone rather when it was added in the servers timezone. Is there a way in Codeigniter to globally set time and date specific to a users location (maybe using their IP) and every time I call date() or time() that users timezone is used. What I am actually asking for is probably how to make my application dependent on each users timezone? Maybe its better to store each users timezone in their profile and have a standard time (servers time) and then convert the time to for each user? Thanks all

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  • Convert javascript ticks to date in Flot jQuery-plugin issue

    - by Kasper Skov
    I have a dynamic Flot graph with dates on the x-axis and numbers on the y-axis. To get the Flot-plugin to read the date object correctly, I had to convert the dates to ticks (with getTime()). My problem is that I can't revers the ticks back to a normal date in my tooltip hover on the graph. I've tried to revers it with this: dateTimeObject = new Date((jsTicks - 621355968000000000) / 10000); All I get, no matter what jsTicks is, is "Jan 02 0001 hh:mm:ss (almost current time)" What am I doing wrong?

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  • JodaTime DateFormatter to display milliseconds if nonzero

    - by Mike
    I want to display a list of dates that may or may not have milliseconds on them. If a certain entry has milliseconds, then it should be displayed like yyyy MM dd HH:mm:ss.SSS. If it doesn't have the millis, I need it displayed as yyyy MM dd HH:mm:ss. I suppose the general question is: Is there a way to describe an optional format string parameter? (I'd like to avoid refactoring all of the places that I use formatters since this is a large code base.)

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  • Convert 12-hour date/time to 24-hour date/time

    - by Patrick Cuff
    I have a tab delimited file where each record has a timestamp field in 12-hour format: mm/dd/yyyy hh:mm:ss [AM|PM]. I need to quickly convert these fields to 24-hour time: mm/dd/yyyy HH:mm:ss. What would be the best way to do this? I'm running on a Windows platform, but I have access to sed, awk, perl, python, and tcl in addition to the usual Windows tools.

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  • monkey patching time.time() in python

    - by user84584
    Hello guys, I've an application where, for testing, I need to replace the time.time() call with a specific timestamp, I've done that in the past using ruby (code available here: http://github.com/zemariamm/Back-to-Future/blob/master/back_to_future.rb ) However I do not know how to do this using Python. Any hints ? Cheers, Ze Maria

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