Calculate Hours And Minutes?

Aug 11, 2010

I would like to calculate the difference between hours and minutes from one textbox and the hours and minutes from textbox two. What would be the best way to do this? I think DateTime would be the object to use, but wondered if anyone has any examples or better ways?

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Forms :: Calculate The Difference In Hours And Minutes?

Jan 17, 2010

i want to calculate the difference in hours and minutes between 4:35:20 PM and 7:25:34 PM? how am i able to do this is vb.net?

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dim seconds = 254565443
dim Hour
dim minute

[Code]....

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I need a timespan difference result in - hours:mintues format.

[Code]...

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[Code]...

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May 24, 2012

This is what I have so far.

[code]...

The first part (Label 1 + Timer 1) works fine and it counts seconds but I want it to count minutes and hours too.

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May 14, 2009

I am working on a timekeeping application in VB 2008 and need to show elapsed time in hours and minutes. I have no problem eliminating seconds but if the hours exceed 24 the time is displayed as days.hours:minutes and what I need is to show (for instance) 30 hours and 15 minutes as 30:15 not 1.6:15

Is there a better way then using code like:
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Is there a way to tab between the hours and minutes values when the format is set to time in the DateTime Picker? The default action is move to the next control. I have the ShowUpDown set to true. Do I have to set up separate controls, one for the hours and one for the minutes to get this functionality?

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Sep 21, 2009

I am adding the timespan and displaying it in a text box...the value can be more than 24 hrs that is the reason i m using the following code..[code]Now i want to add the value of wtothrs0.Text and wtothrs1.Text....but in the form of "hrs:min".

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Oct 21, 2010

to obtain double quantity between 2 hours I do this:

[Code]...

But how would it be inversely?For example if I have a number (double), how I know at all the hours and minutes are they?

[Code]...

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May 19, 2009

I am building a very basic calculator which adds and subtracts various numbers from various text boxes when I click on the 'button'. This works fine with:

TextBox3.Text = TextBox2.Text + (TextBox1.Text * 1000)

etc but when it comes to adding or subtracting time I get completely lost.Say I want to add 50 minutes in one text box to 12 minutes in another to display 1:02 in a third text box by clicking the same 'button'I am using Visual Basic (in visual studio 2005) to program a Windows Mobile Classic 6 PDA?

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I have a date value (e.g. 2011-04-11 07:45:00.000) which I am pulling from my database (via Entity Framework). I need to pull out only the hour from the original date value (e.g. 07:45:00), get the current time, and then subtract the current time from the database time value. In pseudo-code, I'm looking to do something like this:

Dim my_date as DateTime = from_db ' This is the value pulled from the database.Dim this_date as DateTime = Date.Now ' This is pulled via a VB.NET function.Dim my_hour = my_date_but_only_hours ' Somehow, I need to strip the date off the my_date Dim this_hour = this_date_but_only_hours ' Same as line above.Dim hour_difference = my_hour - this_hour Response.Write("There are " & hour_difference & " hours left before the time runs out.")

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DB/Reporting :: Adding Minutes / Hours To Time

Sep 7, 2008

In Microsoft Access I use: Hours(time) minute(time) function to get current time hour and minute. I then use loop to add to the minutes until it ends in a 5 or 0 to round it up to the next 5 minutes. e.g. 13:43 rounded up to 13:45 I use IF statement to make sure the minute does not exceed 60 to start the hour. I want to use that time to add hours or minutes to easier e.g. add 15minutes, add 1 hour ect.

[Code]...

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Aug 24, 2009

im using ms visual studio 2005- vb.net (im a new beginner too)how can i convert decimal result into hour,minutes,seconds? i have degrees result --> i already convert to decimal --> now i need to convert the decimal into hours.i use this formula-degree into decimal (just a notes-im try use calculator)[code]

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I am writing a program and have run into an issue. The program requires a conversion of time (e.g. hours,minutes,seconds) to a hexadecimal value of no more than 4 bytes (e.g. FFFF). I have no idea how this is done. Can anyone point me to a tutorial or give a quick explanation. Sample code would be great as well.

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May 18, 2009

I want to display the duration only Hour, Minutes, and Second in data Gridview by Subtract TimeCheckOut from TimeCheckIn in ASP.NET using LINQ to SQL Here is code behind:

[Code]...

In Line 3 in function, Dim dif as TimeSpan = DateTime.Now.Subtract(Duration) which give only the duration of Hour, Minute, and Second from TimeCheckIn until DateTime.Now. However, I want to have the duration from TimeCheckIn until TimeCheckOut only in Hour, Minute, and Second.

I know that the FieldDisplayDuration function is totally wrong logic, but I just want you to get my point only, and also it could be the code sample for those who want to calculate the duration of the employee from the hire date. Finally, Let's get back to TimeSpan by Subtract TimeCheckOut from TimeCheckIn in gridview problem, How can I do that?

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Dec 29, 2010

Here's the
CanTest = CanTest OrElse (DateTime.Now.Subtract(LastTest).Hours >= 1)
If CanTest Then

[code]....

However, when I change it to 65 minutes instead of 1 hour, it acts up. The time until next question starts going up instead of down... The only thing I changed is 1 hour to 65 minutes:

CanTest = CanTest OrElse (DateTime.Now.Subtract(LastTest).Minutes >= 65)
If CanTest Then
If InputBox(Question(Cur), "Question #" & cur.ToString("###,##0")) = Answer(Cur) Then

[code]....

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Oct 21, 2010

I have three sets of labels, lbl_seconds, lbl_minutes and lbl_hours. These labels have the default value of 00:00 and I want the timer to change that for each label. I have googled this but I cannot seem to find any good info on it. Do I need three separate timers? I have also noticed that the timers have their own tick event handler. I guess it's in this that I need to change the value of the label. But I cannot figure out how to do just that.

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I have 4 textboxes Hours, Minutes,Seconds,Milliseconds. When textboxes values are set the count down begins. So far everything works except the milliseconds

Timer1.Tick
Timer1.interval = 100
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
Dim Vals3(3)

[code]....

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I use a masked textbox, and I would control the input, the problem is, I use 1 textbox and the control should on the first 2 digits with a maximum of 24 and the last 2 digits with a maximum of 60. Is there a possibility to program this?

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TextBox1.Text = Environment.UserName + "_" + My.Computer.Clock.GmtTime.Year.ToString + "_" + My.Computer.Clock.GmtTime.Month.ToString + "_" + My.Computer.Clock.GmtTime.Day.ToString + "_" + My.Computer.Clock.GmtTime.Hour.ToString + "_" + My.Computer.Clock.GmtTime.Minute.ToString + "_" + My.Computer.Clock.GmtTime.Second.ToString
This produces, for instance, such text in the TextBox1:
MyUsername_2011_2_6_23_22_6

I would like it to displat double numbers for month, day, minute etc, to get something like that:

MyUsername_2011_02_06_23_22_06

How do I do it?

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i have a TimeSpan object which calculates hours and minutes that are passed in.[code]

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I have tried searching all over the web for this logic. Got many but half of them did not match what i was looking for and half were malfunctioning.I want to calculate business working hours between 2 datetime, where in I should be able to set the working hours as well as weekends and holidays should not be calculated.

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I have this code that is supposed to calculate the gross pay based on hours and rate, the program debugs without a problem but when I click the calculate button it gives me and answer of "0.00".

Public Class frmMain
Private Sub btnCalc_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnCalc.Click
' calculates and displays a gross pay amount
Dim dblHoursWkd As Double
[Code] .....

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What I need to do to make this code work for hours as well?[code]...

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This is my function to goto a specific time in a movie or music, ... check it out..

'GOTO TIME IN MOVIE, or SONG.
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[Code]....

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Apr 27, 2009

23430 seconds = 06:30:30 (hh:mm:ss)52230 seconds = 14:30:30 (hh:mm:ss)The problem occurs when my total seconds goes over 24 hrs. So for example,95430 seconds should equal 26:30:30 (hh:mm:ss) however comes out at 02:30:30.Here is the sample code, note I have tried using TotalHours, TotalMinutes TotalSeconds however this does not give the correct result. I potentially need to be able to calculate upto 1000 hours - e.g 3601839 should equal 1000:30:30  (hh:mm:ss)

Dim ts
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Dim hours

[code].....

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I am looking for formula that is accurate in converting Minutes to Decimal Minutes i.e  30 minutes is 50 Minutes in Decimals so 1.3 hours is 1.50 and not 1.5 i have used Minutes/60 but it is not accurate   as some times i have to Multiply the result by 100 and some time 1000 to get correct results based on single digit Try 1/60, 10/60 99/60 or 100/60.What would be the most efficient and correct way to Convert the time into Minutes ?

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I have an application that provides a countdown for 60 minutes and I'm currently using the win form timer and it updates some labels and a progressbar. Now I have to change this to be a countdown for 360 minutes. Will the win form timer be sufficient or should I implement a Timers.Timer instead?

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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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I have DGV like parent form and detail form like child. I want to give ability to user enter time in detail form in format like HHH:mm, save that value in database and display it in DGV.How to format timepicker or maybe need to use other control to have ability enter time data in format like HHH:mm?

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This Code allows you too countdown seconds and minutes but im not sure how to add hours or maybe even days to it,[code...]

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can anyby help me to add 4 hours to the following date time value [code]

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Mar 27, 2011

I am writing a system that utilizes the Timer to execute a command after an interval of three seconds. The command is to send a trigger to my RFID reader and hence the program will then decode the received data and changed it to information. It runs fine for the first few hours, but it will crash after that and the error given is an "System.NullReferenceExeption - Object reference not set to an instance of an object." error. Initially, i thought that it might be something that relates to my comobobox selected index change event that might be causing the crashes, but yet the application is crashes after i removed the section.

I fail to find the reason of the crash, even after spend fewing days finding the memory leak or some other events that might cause the crash.

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I have 2 applications, 1 that goes out and grabs data every minute and inserts or updates that data depending on a time interval into sql tables, the other 1 goes out at the top of every hour and grabs hourly data.  Both of these applications run perfectly fine when they are compiled and published to run on my development PC, both do xml validation and check for duplicate data prior to any sql insert so I know it's not getting SQL exceptions.

When I move them to the Production Server the 1 minute application will work for a few hours and then freeze up and stop working.The hourly application half the time won't work at all.

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if i have two variables,

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Dim Minutes

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Dim hours 
Dim mins
IF mins > 60

[code]....

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 I have a string that extract it from database table row

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How to convert the hour String  to a real hour for the date type?

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I want to know how to sum time like
Case 1
If I have MaskedTextBox included 11:00 am and I have onther MaskedTextBox included 1:30 pm. How I get result be 2:30 hours ????

Case 2
If I have ListBox Included 5:01 , 4:30 , 6:10 , 3:20
5:01
4:30
6:10
3:20
Sum Result
H 18: M 61
Convert To Hours
H 19 : M 01

How to Do this Operation with Code VBnet 2005?

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I'm writing a program that checks something once a day. When the property has been checked, I store the "Now" value as LastCheckedDate. Since this is a dateandtime, in includes both the value of the date and the value of the time. The next time the program is run, I want to determine if the current value of Now has a different date than the LastCheckedDate. The problem is that functions like Datedif subtract the two values using the times, so if the first check was at 16:30 on 11/2/2011 and the second check was at 9:05 on 11/3/2011, the result is about 16 hours, which is 0 days.

[Code]....

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