C# - Calculate Location And Number Of Intersections Between Multiple Date/time Ranges?
Apr 29, 2010
I need to calculate the location of intersections between multiple date ranges, and the number of overlapping intersections. Then I need to show which date/time ranges overlap each of those intersecting sections. It is slightly more complicated than that so I'll do my best to explain by providing an example. I am working in VB.Net, but C# examples are acceptable as well as I work in both.
We have several high risk tasks that involve the same system. Below I have three example jobs named HR1/2/3/4 with start and end date/times.
HR1 {1/6/2010 10:00 - 1/6/2010 15:00}
HR2 {1/6/2010 11:00 - 1/6/2010 18:00}
HR3 {1/6/2010 12:00 - 1/6/2010 14:00}
[Code]....
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Mar 30, 2009
I am trying to calculate the number of years for my calculate age event handler, however i am apparently missing a method or whatnot because im trying to calculate the age , can anyone suggest help on this. I need to subtract years to get my age but when i try the birthdate.Subtract (currentDate) method i get an error about not able to convert from LONG?
So below is what I have.
Private Sub btnCalculateAge_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculateAge.Click
Dim currentDate As Date
Dim BirthDate As Date
Dim Age As Long
[CODE]
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Jun 23, 2009
I have following code (in VBA, excell) for calculating a date.I have variable for yeay, weeknumber and daynumber from week, now i wanna calculate the exact date. [code] But when i place this code in vb.net don't get the correct month.It displays correctly the year, day and daynumber but is displays the month as '00'. What do i have to change?
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Dec 31, 2011
Can someone please help me make this work? I want to do in vb.net calculate time between to date like this:
startdate: 2011/12/30
enddate: 2011/12/31
Calculate: ? hour ? minute ? secends
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Jun 10, 2010
write a code that can calculate the difference between the datetime a article has been published and datetime of now.like this example :this article has been published 4 minutes ago...this article has been published about 2 days ago...
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Jan 22, 2010
I m working on a site which requires me to calculate date(s) from the given week number for the year start set by the user in his setup.for ex. user set the year is from 1st April to 31st May in his setup and he selects week say 23rd then I have to find out dates for the week selected.
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Jun 16, 2011
What's up guys. Simple question today. How do you specify ranges of values for location? Basically i'm trying to write an if statement that will execute if a location matches a range of values, here is th snippet of my code im having trouble with:
If Player.Location = New Point(0 To 240, 240) Then code here
But that didn't work at all, there was no error, but the code just wouldn't execute when the "player" was in that range!
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Jun 21, 2010
What I am trying to create is a log in system, and in one of my forms I want to limit the date entered into a form. For example a user cannot enter a date more than seven days from todays date Which is what i achieved but what i am stuck on is preventing a user entering a date in the future
[Code]...
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Mar 16, 2012
I am writing a personal accountant software using VB2010. What I'm looking for now is to get the week date range of a specific date (Monday to Sunday). For example, if the given date is 16/03/2012, I want to get back:12/03/2012 -> 18/03/2012
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Jun 13, 2012
Basically I am looking for a means within a asp.net 2.0 (or higher) application, to identify a time zone and UTC offset for a specific location and date. I want to be able to look up the time zone rules using either city & state, Zip, or LAT & LON I have an event database that tracks location, date and time for the events. Times are recorder relative to the event and the records do not currenlty indicate the timezone for the event or whether or not DST is in effect. Recently, I have encountered a situation where I need to link several events across different time zones. What I am looking to do is:
first, record a master event, say for August 13 2012 at 8:PM in New York, NY 10021
Second I need to record a related event in Houston TX.
When I record the related event I want it to automatically populate the date and time relative to its local time time zone rules. To do this it needs to be able to identify the effective timezone and UTC offset for the master event as well as the linked event so that I can calculate the correct date and time to display on the satelite program. As a future update I would probably capture the time zone /utc offsets with each program so that I don't have to recalculate the master record each time I want to add a related event.
So far I have not seen a way from system.timezone or timezoneinfo to be able to look up a timezone and the effective UTC offset of a given date and location.
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Feb 18, 2012
I am creating a program for which will calculate the time taken for a user to make a number keystrokes. I want to start the timer running from the beginning of the first key stroke and end on the final keystroke. Each keystroke has been linked to a label which will change colour according to whether the key has been pressed. When the keystrokes have been finished I want to save this timespan in a field in a database. To test that the timer is running I have made a messagebox which will show the time taken however it is constantly showing zero and the label for the final keystroke is remaining in the keydown colour.
Public Class Form1
Dim dteStart, dteFinish As Date
Dim span As TimeSpan
[code]....
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Jun 30, 2009
I am creating a program that takes into account pay from a job. I will try to describe the problem I am having using some psuedo code - so dont take syntax too seriously.
I created a structure that has some of the following values:
Name as String
Amount as Double
FrequencyType as MyEnumerator
MyEnumerator looks like this:
EveryTwoWeeks = 1
TwiceAMonth = 2
Weekly = 3
Now my problem is how do I add the date ranges into my structure?If your pay is weekly or twice a week, then I just need a single date because all other paydays should increment in 1 or 2 week blocks. But if the pay is twice a month I need two dates. It seems like there has got to be a better way then just having two dates in my structure and knowing that you just need the 2nd date if the FrequencyType is = 2 (TwiceAMonth).I was thinking that instead of a Structure I should use a class and then I could create a function that returns the date or dates depending on the enumeration type that you pass into it.What would be the "correct" way of doing this? I think I need a type of enumerator that allows for more then just integer type values.
[code]...
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Feb 21, 2012
I am developing a billing application to help out the billing lady who has been doing our billing by hand. I am essentially done�. Except for one class of customer I can�t wrap my head around. Nuts and Bolts:
1.Data comes from a table that shows Storage id, customer id, Billing Start date, Billing end date.
2.I am kicking the data back out to a table and I�ll build her a nice little crystal she can run.
Problem:We rent storage space. If multiple customers use the same storage then they will split the cost of the daily fee. If there is 3 customers they each pay a third etc. This seems simple but If Customer 1 starts on 1/1/12 and ends 1/10/12 she pays 10 days. If Customer 2 comes in 1/3/12-1/9/12 they will split 7 days. If Customer 3 comes in only on 1/9/12 then they will all pay a third on that day. Now imagine this across 600+ storage units and 1000+ customers and each customer using multiple storage at any given time.
My biggest issue is I don�t know how to express how we do that calculation by hand programmatically. By hand process and how I figure I am eating the elephant: Find every Customer that has used the Space in the billing period -Determine the unique storage numbers that were used during the billing cycle kick the results to a storage table on an access database. I am using a table because I figured it would be less of burden for the application then a list or array.
Determine where there is overlap - Use �FOR� to cycle through the orginal data table using the unigue. Here is where I am stuck. How do I compare the dates in a way to determine which customer is using it when compared to the others. Obviously i can determine the difference in dates between the start and end. It is getting the applicaiton to recognize the dates are with in the other dates. here is kind of what I was thinking obviosly this doesn't work I am just using the format so don't crush me too bad because I code like a caveman.
Dim CustomerDifference as time span
Dim UniqueStorage as Integer
Dim Customer as string
[code]....
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Aug 9, 2008
This is my first program and have absolutely no training in programming Visual Basic Studio 2008 so forgive me if I have missed something obvious.Form3 contains a StartDate(Date Time Picker1)and EndDate(Date Time Picker2) with a button1 which launches a Form4 containing a report( Microsoft Report Veiwer)
I have been able to generate a report but it gives me everything in the database instead of date range selected.I have tried generating queries,stored procedures and writing additional code but nothing seems to work.( Though I may of but them in the wrong place)
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Aug 4, 2009
I need to generate a report that shows the 52 weeks of a year (or 53 weeks as some years have) and their start and end dates. There is an ISO spec to do this but seems awfully complicated! Im hoping someone knows of a way to do it in C# or Visual Basic (its actually for Visual Basic 6 but I will try port it across)
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Mar 24, 2010
I want to convert e.g. 21/06/2009 15:30:00 to seconds or a decimal number. Just like PHP, which uses a reference date (01JAN1970)
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Jan 25, 2012
I am using a vb windows application I need to allow a user to enter their ID num in a text box and it need to automatically populate their date of birth
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May 25, 2009
i am a beginner learning vb.net. I have an excercise to create a form and on clicking the totals buttons it should display the number of employees who have earnt a salary within the ranges below. Now this code works, but i want to substitute the Select Case Statement with a more efficient for..next statment to increment my counter. The code is:
[Code]....
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Jul 20, 2010
I have been asked to create a program to create schedules for the Hospital where my wife works. Right now they do it in excel with a few macros. One question before I start, can multiple dates be selected from a DTP. Say for the month of July, my wife has to work the 3,4,5, the 10,11,12, the 17,18,19 and the 24,25,26. Can I select multiple dates for the month?
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Jul 16, 2010
Thought I'd see if Stack overflow is quicker than me testing something while I get a thousand interruptions from other work :)
I'm updating an old VB net application and trying to refactor some of the logic as I go. The app looks for data from a single date across a few tables and writes that view to a file.
Writing the query in SQL I'd get the equivalent of
SELECT * FROM table
WHERE CAST(FLOOR(CAST(table.date AS float))AS datetime) = '15-Jul-2010'
Ideally I'd use
SELECT * FROM table WHERE date=@input
and add a date object as a parameter to a System.Data.SqlClient.SqlCommand instance
Are those two comparable? Will I get the results I expect?
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Jan 12, 2010
I am using VB 2008 and want to record a start date and time and then the stop date and time in a rich text box, i can get the start time into the box but so far can only stop the time instead of 2 seperate times, what i have is a drop down box with a list of computers 1-10 i was trying to get it so you picked a certain computer and that went into the text box then you started the timer and that was recorded, finally you stopped the timer and that was recorded but as i am a total newbie it does not work
Here is the code i have.
Public Class Form1
Dim time2 As Date
[CODE]...................
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Apr 8, 2010
Title pretty much says it all. How do I format the date of a dateandtimepicker to insert it into the SQL date datatype?
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Apr 26, 2010
I created a button instead of the print button in crystal report because i need to record the report printed report serial number, date and time to the database. when i click on the button, dialog box appear. if i click on the ok button , system record the printed report details to the database and report printed successfully. but when i click on the cancel button , system again recording the printed report record.
[Code]...
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Jun 25, 2009
there, im doing a leave management system with vb 2005..and here's my problem -how do i 'find' the expiry date?? eg: from the datetimepicker in my form, if the date i select is 1st january 2009.....how do i type the code to find the expiry date 1 year later (which is 1st january 2010) and display the date in a textbox in my form???
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Apr 16, 2012
I know how to calculate a city's location on the world map by using its geographical coordinates as a pixel on the map but how in .net can I draw a link with a cuve? Once I have the curve does anyone know how to determine where the curve should be for the shortest route?
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Jun 18, 2012
I am trying to calculate the time difference between two points in time. I am using: Environment.TickCount.I set a long variable to the Environment.TickCount and then a second long variable to Environment.TickCount at a later point in time. I then subtract the second long variable from the first long variable, yet an incorrect difference is returned.
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Sep 6, 2009
I have an ASP.NET application with a SQL Server back end. I am storing all my dates in UTC format and doing the appropriate conversions to the local time zone of the browser viewing it. One of the pages asks for a start date and end date (no times).
I am taking the start date and setting the time to 00:00:00 hours (midnight) and I'm taking the End time and adding a time of 23:59:59, so that the date range covers the whole day. Now what I'm trying to do is do a SQL query to do a search for records in this date range. The problem is, the data in SQL is in UTC time and the user is typing their dates and times in their local date and times. My quickest solution was to convert the date and time to UTC, then search the records. However, by doing this, I am to believe ASP.NET converts the given time and date to UTC based on the server time zone. How can I convert a date and time to UTC time based on the time zone of the user?
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Aug 28, 2011
Is there a query that can use to sum up data from date until another date? how to do it in VB.NET.
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Nov 18, 2009
I need to add 3 months to a date so i can calculate when a clients email bundle is out dated.so for instance the client registed his bundle on 2009/09/01. I need to be able to add 3 months to this date so it comes out with 2009/12/01 and then compare the dates.
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Sep 15, 2009
I am using VB.NET. Is there a date function that calculates the date based on the number of months I have given?
for example, if i say July 2009 and looking for 10 months back, it should return Sept 2008.
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