Use Datetime To Calculate Hours

Aug 16, 2010

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

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Convert String To Datetime & Calculate The Datetime?

Mar 23, 2011

how to convert string to datetime and calculate date

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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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Logic To Calculate Business Hours?

Aug 16, 2010

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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Calculate Gross Pay Based On Hours And Rate

Nov 16, 2009

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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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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Calculate DateTime With LINQ To SQL?

Aug 17, 2010

I have two tables TimeSheet and TimeRecord. TimeRecord has Foreign Key TimeSheetId of TimeSheet. The following time-logs are from TimeRecord[code]...

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Calculate The Hours, Minutes, And Seconds In A Number Of Seconds?

Jun 30, 2011

I want to convert seconds such as 254565443 seconds to hours, minutes, and seconds and thought if I could remove the decimal and the numbers behind it and not change the number in front of the decimal then it would work.

dim seconds = 254565443
dim Hour
dim minute

[Code]....

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Using Timespan To Calculate Hours, Mins And Secs From Secs?

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
As TimeSpan = TimeSpan.FromSeconds(95430)
Dim hours

[code].....

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Date Method - Calculate The Number Of Years For My Calculate Age Event Handler

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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Match A Certain DateTime Value With Current System DateTime

May 7, 2010

I'm trying to match a certain DateTime value with the current system DateTime. I have a timer and a label on a form. Timer interval is set to 1000. When the form loads, the timer starts ticking. As soon as the current DateTime matches the value of the variable, it shows a message in the label. When I'm writing the following code, the values don't match even if the current system DateTime is equal to the variable. Label1 isn't showing 'Times Matched':[code]The default format of 'Now' is the same as I have stored in dtmVar variable. So there's no question of format mismatch. Does that mean 'Now' is not actually a DateTime property? Provided, my O.S. is Windows Vista Ultimate and all date/time settings are set to default.

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Match A Certain DateTime Value With The Current System DateTime?

May 1, 2010

I'm trying to match a certain DateTime value with the current system DateTime. I have a timer and a label on a form. Timer interval is set to 1000. When the form loads, the timer starts ticking. As soon as the current DateTime matches the value of the variable, it shows a message in the label.

When I'm writing the following code, the values don't match even if the current system DateTime is equal to the variable. Label1 isn't showing 'Times Matched':

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
Dim dtmNow As DateTime

[Code]....

Why is it so? The default format of 'Now' is the same as I have stored in dtmVar variable. So there's no question of format mismatch. Does that mean 'Now' is not actually a DateTime property? Provided, my O.S. is Windows Vista Ultimate and all date/time settings are set to default.

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Update Datetime Field With Empty Datetime?

Aug 8, 2011

datetime1 and datetime2now two fields are have data ( date )in table recordi want to update only datetime2 is an emptyi am using visual basic 2010 ( visual studio 2010

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C# - Compare Datetime.Now With A Datetime Variable

Dec 27, 2010

I try to compare Datetime.Now with a Datetime variable I set, using the Datetime.CompareTo() method. I use a timer to compare these every second and display the result, but as the current time approaches the time I set, the result changes from 1 to -1, but never 0, which means these two are never equal. I'm suspecting the Datetime structure contains milliseconds?

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Challenge - DateTime Minus DateTime?

Mar 14, 2011

Assume the following program is started at 1:59:01 AM on 3/13/2011 in the United States. The first time Timer1 ticks what will be the value of the TimeSpan (ts)?

Public Class Form1
Private Sub Timer1_Tick(sender As System.Object, _
e As System.EventArgs) Handles Timer1.Tick

[code].....

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VS 2010 Add Datetime Into Sql - Datetime - Field

Jan 29, 2011

I'm trying to add the date and time of Today into a Sql-database-field that has the datetype datetime.

[Code]...

the msgbox gives me the following result: 29/01/2011 18:49:21 my sqlException gives me the following error: 102 - Incorrect syntax near '18'. Is it better that i set the datatype to char in my sql database? It's maybe a bit easier? When I do that, can I calculate with these date?

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Enter More Then 25 Hours Value?

Jun 16, 2009

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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How To Add Hours Or Maybe Even Days To It

Nov 15, 2011

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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Convert Iso Datetime To Est Datetime?

Oct 27, 2009

How do I convert ISO datetime to locat EST with vb.net?

I have input time as e.g. "20091027T1639Z" which is ISO GMT.

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Add 4 Hours To A Date Time Value

Nov 17, 2009

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

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Application Crashes After Few Hours?

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.

I have insert TRY CATCH METHOD, just to catch the exeption error message that might cause by one of the codes, but still it doesnt show me.

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Application Only Runs For A Few Hours

Mar 17, 2011

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.

I've made sure to include a local copy of the references when I compile/build and publish the application. I've made sure the Production Server is up to date with the latest .Net framework.

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Calculating Numbers And Hours?

Mar 26, 2009

if i have two variables,

Dim Hours
Dim Minutes

what i want to do is add the minutes to hours, so if Hours =2, and minutes = 120 I want to say hours = hours+2, not so simple as it seems or am i missing something?

Dim hours
Dim mins
IF mins > 60

[code]....

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Convert A String To Hours?

May 1, 2009

I have a string that extract it from database table row

Dim Hour As String ="4:15 PM"

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

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Convert Seconds To Hours?

Mar 2, 2010

[code]....

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From Days En Hours To Minutes?

Dec 28, 2011

In a textbox the text 1 Days, 8 hours, 45 minutesI want the outcome in minutes , how do i do that ?

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How To Sum Time And Convert Into Hours

Sep 6, 2007

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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Subtract Two Dates Without Using Hours In VB

Nov 3, 2011

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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Timespan Hours And Minutes?

May 23, 2009

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

[Code]...

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Timespan In Hours And Minutes

Dec 12, 2010

i am struggeling with the result of this code. It's present 164,4 hours which is correct, but i like it would says 164 hours 24 minutes.

[Code]...

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