timespan

问题 This question already has answers here : How to join two dataframes for which column values are within a certain range? (5 answers) Closed last year . I need to merge two pandas dataframes on an identifier and a condition where a date in one dataframe is between two dates in the other dataframe. Dataframe A has a date (\"fdate\") and an ID (\"cusip\"): I need to merge this with this dataframe B: on A.cusip==B.ncusip and A.fdate is between B.namedt and B.nameenddt . In SQL this would be

问题 I want to know how much time a procedure/function/order takes to finish, for testing purposes. This is what I did but my method is wrong \'cause if the difference of seconds is 0 can\'t return the elapsed milliseconds: Notice the sleep value is 500 ms so elapsed seconds is 0 then it can\'t return milliseconds. Dim Execution_Start As System.DateTime = System.DateTime.Now Threading.Thread.Sleep(500) Dim Execution_End As System.DateTime = System.DateTime.Now MsgBox(String.Format(\"H:{0} M:{1} S:

问题 Using .NET 3.5 I want to determine if the current time falls in a time range. So far I have the currentime: DateTime currentTime = new DateTime(); currentTime.TimeOfDay; I\'m blanking out on how to get the time range converted and compared. Would this work? if (Convert.ToDateTime(\"11:59\") <= currentTime.TimeOfDay && Convert.ToDateTime(\"13:01\") >= currentTime.TimeOfDay) { //match found } UPDATE1: Thanks everyone for your suggestions. I wasn\'t familiar with the TimeSpan function. 回答1: For

问题 Say I convert some seconds into the TimeSpan object like this: Dim sec = 1254234568 Dim t As TimeSpan = TimeSpan.FromSeconds(sec) How do I format the TimeSpan object into a format like the following: >105hr 56mn 47sec Is there a built-in function or do I need to write a custom function? 回答1: Well, the simplest thing to do is to format this yourself, e.g. return string.Format("{0}hr {1}mn {2}sec", (int) span.TotalHours, span.Minutes, span.Seconds); In VB: Public Shared Function FormatTimeSpan

问题 This question already has an answer here: How can I String.Format a TimeSpan object with a custom format in .NET? 19 answers Timespan formatting [duplicate] 5 answers I have two DateTime vars, beginTime and endTime. I have gotten the difference of them by doing the following: TimeSpan dateDifference = endTime.Subtract(beginTime); How can I now return a string of this in hh hrs, mm mins, ss secs format using C#. If the difference was 00:06:32.4458750 It should return this 00 hrs, 06 mins, 32

问题 Is it ever OK to use Environment.TickCount to calculate time spans? int start = Environment.TickCount; // Do stuff int duration = Environment.TickCount - start; Console.WriteLine(\"That took \" + duration \" ms\"); Because TickCount is signed and will rollover after 25 days (it takes 50 days to hit all 32 bits, but you have to scrap the signed bit if you want to make any sense of the math), it seems like it\'s too risky to be useful. I\'m using DateTime.Now instead. Is this the best way to do

问题 I am retrieving two date time values from the database. Once the value is retrieved, I need the difference between the two values. For that, I create a timespan variable to store the difference of the 2 date values. TimeSpan? variable = datevalue1 - datevalue2; Now i need to show the difference which is stored in the Timespan variable in terms of number of hours. I referred to TimeSpan.TotalHours but couldn\'t apply the same for some reason. How do I do that? I am using C# on a MVC project. I

问题 In C#/.NET TimeSpan has TotalDays , TotalMinutes , etc. but I can\'t figure out a formula for total months difference. Variable days per month and leap years keep throwing me off. How can I get TotalMonths ? Edit Sorry for not being more clear: I know I can\'t actually get this from TimeSpan but I thought using TotalDays and TotalMinutes would be a good example to express what I was looking for ... except I\'m trying to get Total Months. Example: Dec 25, 2009 - Oct 6, 2009 = 2 TotalMonths.