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Jun 12, 2012

So let's say I have 1400, I want to convert it into 2:00PM I tried the following:Dim convertedTime As String = DateTime.ParseExact(theTime,"HHmm", Nothing)

And it would give me this: 6/12/2012 02:00:00 PM

I do not want the date part, neither do I need the seconds. All I need is 2:00PM


Convert Time String To Hour?

Dec 1, 2010

I have a text box in a GUI where user can enter in time in this format: 2:00 PM

I want to take this text and convert it into hour of the day (sorta military time but I just want an integer)[code]...

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Protected Overrides Sub OnStart(ByVal args() As String)
' Add code here to start your service. This method should set things
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This code works, however, if the service starts at, say, 10:15, then it executes at 10:15, 10:45, 11:15, 11:45. How do I make it so it always executes on the 30 minute and top of the hour marks?

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Nov 20, 2010

I have 2 datetimepickers. I want one to display the current time and the other to display the time one hour ago: So far I can getb them both to display the current time:

Dim TimeInterval As Integer = 60
Private Sub SustomizeGraph_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
TimeTo_dtp.CustomFormat = "HH:00"


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Nov 6, 2011

vb Label3.Text = Format(Now, "mm:hh")

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Nov 25, 2011

I have a DateTimePicker,whose

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Nov 25, 2011

I have a DateTimePicker,whose dateTimePicker1.Format = Time dateTimePicker1.ShowUpDown = True But now i want only the hour part from the Date Time Picker as i have to compare the hours with some logic in my Database.

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Sep 28, 2011

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May 6, 2009

in one textbox i have 10:00 PM and in another textbox i have 12:00 PM....i want to subtract 10:00 PM from 12:00 PM and get result ie 2 can i perform that?

DateTime.TryParse(TextBox1.Text, d1)
DateTime.TryParse(TextBox2.Text, d2)
the code is to convert the text into time.


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Nov 20, 2011

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Public Class TimeTest
Dim time As New Time() ' construct Time with zero arguments
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Private Sub addSecondButton_Click(ByVal sender As System.Object,


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Oct 11, 2008

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Dec 2, 2011

ghtSavingTime to the hour

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Mar 14, 2011

I thought i had coded correctly to catch the Daylight savings time change, apperantly not. 

Here is the code that I used:

If Today.IsDaylightSavingTime() Then
Day = DateTime.Now.AddHours(-1)
Day = DateTime.Now()
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Jan 16, 2009

I've written a console utility to set file date/time stamps to a specified date/time: 

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When I go to a command prompt to check the results, the new date is correct, but the hour is off by 1 hour. Same when I check the times in Windows Explorer -- all three times are displayed to the same time, but exactly 1 hour earlier.The system date/time are correct (Vista) and we are not in DST.The files reside on a local drive (not a network share).The computer is not on a domain.

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Jan 23, 2009

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Nov 18, 2010

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Feb 16, 2010

I have a windows service in VB.NET 2008 and want to fire an event every hour on the hour within the service?

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I also want the service to read this in form an XML file i have modified from a service control app can i use app.config for this as i've read your not supposed to write to this file?

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Jul 27, 2011

I am using a textbox in but the input should be an hour format for example, "13h30". How can I enfprce this by a user? When he puts the first 2 digits like 13 then automaticly the appl. puts a "h" between?

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Oct 8, 2008

How to get the total minutes in an hour?
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Jan 5, 2011

I'm working on a program that records date metadata from files, such as creation time, last modified time, etc. An old version of the program is written in VBA, and does something like this: [Code] Both functions are running on the same machine, checking the same file. I've also tried using the IO.FileInfo class with the same result. I've checked thousands of files and they are all off by one hour. The other date properties for creation time and last modified time are also off by one hour.

I forgot to mention in the original post, The computer's time zone is CST, and daylight savings time is currently not in effect. I've reproduced the problem on Windows 7 64 bit and Windows XP 32 bit.

everyone who suggested trying to calculate the desired date from UTC using the appropriate time zone offsets. At this time I'm deciding its not worth the risk to do so. For this particular business requirement, its much better to say the date value is not what you expected it to be because thats just the way the API works. If I attempt to "fix" this then I own it, and I'd rather not.

Just for kicks I tried using the good old Scripting.FileSystemObject via interop. It gives the expected results that agree with Windows Explorer, with about a 5x performance penalty compared to System.IO. If it turns out I must get dates that match what Windows Explorer has, I will bite the bullet and go this route. [Code]

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May 6, 2009

in one textbox i have 10:00 PM and in another textbox i have 12:00 PM....i want to subtract 10:00 PM from 12:00 PM and get result ie 2 can i perform that?

DateTime.TryParse(TextBox1.Text, d1)
DateTime.TryParse(TextBox2.Text, d2)

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Normally i would use Scheduled Task for this however it doesn't give you the option for hourly just daily, perhaps i'm wrong about this.

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May 7, 2009

Is there any way to check date and hour without using two Timers?

Right now i have this for the date:

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


PS (again): I thought about setting the Timer1 interval to 60000miliseconds, so that it would check the time everysingle step of the way (or maybe 10 minutes...), but I don't want the app to lag, so... How can i implement a Background Worker?

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Jun 2, 2011

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Aug 24, 2011

I have data contained in a file on a FTP site that I need to grab hourly because it updates hourly(this I easily have figured out).  Now the problem I have is that when the data is grabbed from the FTP site it is space delimited and looks like this: (

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The following code takes a timeframe in minutes since midnight and creates an array with minutes pr hour. But, it's slow. Any better suggestions out there? (no, changing language is not an option :-) )

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Dim lHour As Long
Dim lMinute As Long
Dim alHour(25) As Long


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Dim time_hour As Integer
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Option Strict On
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[Code] .....

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