How do I check if my current time is between 06:00:00 AM and 11:00:00 AM?
Is it something like this?
If Now.ToString("hh:mm:ss tt") >= "06:00:00 AM" and Now.ToString <= "11:00:00 AM" Then
'Do something
End If
I'm sorry. I'm still learning.
I feel like there ought to be an easier way to do this, but if there is, I can't think of it. Here's the easiest/safest way I came up with to do it:
Dim curr As Date = Date.Now
Dim startTime As New Date(curr.Year, curr.Month, curr.Day, 6, 0, 0)
Dim endTime As New Date(curr.Year, curr.Month, curr.Day, 11, 0, 0)
If (curr >= startTime) And (curr <= endTime) Then
' Do something
End If
Good. Here is an updated version. Convert 24hour clock time to an integer then do logic on Integers
Dim timeValue As Integer = Now.ToString("HHmm")
If timeValue >= 600 and timeValue <= 1100 Then
' do it now
End If
You're very close. I would do it with 24 hour clock to avoid ambiguity:
Dim timeNow As String = Now.ToString("HH:mm:ss")
If timeNow >= "06:00:00" And timeNow <= "11:00:00" Then
'Do something`
End If
Related
I am using VB.NET. I have a dropdownlist named startTimeDDL. Than I am using loop to enter in time inside that dropdownlist.
' Auto fill "Start Time" for DropDownList
Dim StartTime As DateTime = #12:00:00 AM#
For i As Integer = 0 To 47
StartTimeDDL.Items.Add(StartTime.ToString("hh:mm tt"))
StartTime = DateAdd(DateInterval.Minute, 30, StartTime)
Next
So look below and that will be inside the dropdownList. notie the format is hh:mm am/pm.
12:00 AM
12:30 AM
01:00 AM
01:30 AM
02:00 AM
...
11:30 PM
Problem:
lets say current time is 1:21:01 pm than I want to write code so it select 1:30 pm from dropdownlist. Now les take another example. les say current time is 12:00:00 AM than I was to select 12:30 AM from dropdownlist. les take one last example. les say current time is 2:10:12 AM than I want to select 2:30 AM from the dropdownlist.
here is the code I wrote so far. problem with it is that I am only selecting the current time. now can I modfily to do what I want?
Dim dDate As DateTime = DateTime.Now.ToString("hh:mm tt")
Dim temp As String = dDate
StartTimeDDL.Items.FindByValue(temp).Selected = True
Round up if the minute value exceeds 30, round down if it's lower.
Here is an example implementation, you'll need to decide what to do with the "exactly 30 minutes past the hour" edge case. In my code it'll round up for that too.
Private Function RoundDateToHalfHours() As Date
Dim current As DateTime = DateTime.Now
Dim ts As TimeSpan
If current.Minute >= 30 Then
ts = New TimeSpan(current.Hour + 1, 0, 0)
Else
ts = New TimeSpan(current.Hour, 30, 0)
End If
Return current.Date.AddTicks(ts.Ticks)
End Function
Usage:
Dim roundedDate As DateTime = RoundDateToHalfHours()
StartTimeDDL.Items.FindByValue(roundedDate.ToString("hh:mm tt")).Selected = True
You are playing fast and loose with DateTime when you should be using TimeSpan, some caution required. The general way to round up an integral number to an arbitrary interval is
roundedUp = interval * ((number + interval - 1) \ interval)
Which you can readily use on DateTime as well by converting it to ticks, a one-liner
Public Function RoundupDate(dt As DateTime, interval As TimeSpan) As DateTime
Return New DateTime(interval.Ticks * ((dt.Ticks + interval.Ticks - 1) \ interval.Ticks))
End Function
Sample usage:
Dim example = #2:10:12 AM#
Dim rounded = RoundupDate(example, TimeSpan.FromMinutes(30))
Wasn't sure what you meant by a 'dropdownList'. For this example I used a ComboBox.
Dim StartTime As DateTime = #12:00:00 AM#
'load combo box
Do
StartTimeDDL.Items.Add(StartTime.ToString("hh:mm tt"))
StartTime = StartTime.AddMinutes(30)
Loop While StartTime.TimeOfDay.TotalDays > 0
Dim selectTime As DateTime = #2:10:12 PM# 'TEST find this <<<<<<<<<<<<<<<<<<<
'round time to 30 minutes
Dim numSecs As Integer = (CInt(selectTime.TimeOfDay.TotalSeconds) \ 1800) * 1800
'the OP said 'les say current time is 12:00:00 AM than I was to select 12:30 AM"
'so....
numSecs += 1800 'round up 30 minutes ????????
'create 'find'
Dim ts As New TimeSpan(0, 0, numSecs)
Dim findDate As New DateTime(ts.Ticks)
StartTimeDDL.SelectedIndex = StartTimeDDL.FindStringExact(findDate.ToString("hh:mm tt"))
I am trying to subtract hours and minutes from a DateTime variable and I have found other posts that show that you should be able to use the .AddHours(-3) in order to achieve this but it is not working for me. I am grabbing the datetime from a DateTimePicker control in vb.net. say the time is 10:00 AM, I want to subtract 3 hours from this to make it 7:00 AM. My hours variable evaluates to -3 but even when I just literally put the number -3 inside the .AddHours it still does not subtract the time. Heres the code
Dim ApptTime As DateTime = Convert.ToDateTime(DateTimePicker2.Value)
Dim travelTime As String = Label60.Text
Dim newtime As Double
Dim split() As String = travelTime.Split(" ")
If split.Length = 2 Then
Dim Minutes As String = split(0).Replace("mins", "")
Else
Dim Hours As Double = split(0).Replace("Hours", "")
Dim Minutes As Double = split(2).Replace("mins", "")
Hours = -Hours
Minutes = -Minutes
ApptTime.AddHours(Hours)
ApptTime.AddMinutes(Minutes)
Label62.Text = (ApptTime.ToString)
It's simple error ...
Dim ApptTime As DateTime = Now
'ApptTime.Subtract(New TimeSpan(1, 60, 60)) 'won't work
ApptTime = ApptTime.Subtract(New TimeSpan(1, 60, 60)) '1h , 60m , 60s
Try this:
Dim NowMinusThreeHours = DateAdd(DateInterval.Hour, -3, Now)
my input is date.
But, i'm stuck on how to retrieve date time in every second.
I need to put the each second date time in the 2d array.so my array(0,0) should equal to 2/10/2014 00:00:00 AM and array(86399,0) is equal to 2/10/2014 23:59:59 PM.
i tried do looping as per below code:
Dim twoDarray(86399, 1) As String
Dim dtInput As Date
dtInput= #2/10/2014#
For i=0 to 86399
twoDarray(i, 0) = dtInput
dtInput = dtInput +second 'i know this not right
Next
I just don't know how to increase date time every second in right way.
Please help.
Have you thought about something along the lines of
Using a Datetime (MSDN Datetime)
dtInput= new DateTime(2014,10,2)
For i=0 to 86399
twoDarray(i, 0) = dtInput
dtInput = dtInput.AddSeconds(1)
Next
Or
dtInput= new DateTime(2014,10,2)
For i=0 to 86399
twoDarray(i, 0) = dtInput.AddSeconds(i+1)
Next
You can try following method also
Dim dtFrom As New DateTime(2014, 10, 2, 0, 0, 0)
Dim dtTo As New DateTime(2014, 10, 2, 23, 59, 59)
Dim iFirstDim As Integer = (dtTo - dtFrom).TotalSeconds
Dim iSecondDim As Integer = 10
Dim arrTime(iFirstDim, iSecondDim) As String
Dim i As Integer = 0
Do While (dtTo > dtFrom)
arrTime(i, 0) = dtFrom.ToString("d/MM/yyyy HH:mm:ss")
dtFrom = dtFrom.AddSeconds(1)
i += 1
Loop
HOW TO USE IT?
Dim dtResult As DateTime
If DateTime.TryParseExact(arrTime(150, 0), "d/MM/yyyy HH:mm:ss", Globalization.CultureInfo.InvariantCulture, Globalization.DateTimeStyles.None, dtResult) Then
MsgBox(dtResult.ToString("yyyy-MM-dd HH:mm:ss"))
End If
i try loop while with datetime each on weekly in VB.NET 2008.
This Code
Private Sub Button1_Click()....
'Select DateTime
Dim strDate As Date = dateTimePicker.Value.ToString("yyyy-MM-dd")
'one week (+7)
Dim strDateWeek As String = DateAdd("d", +7, dateTimePicker.Value.ToString("yyyy-MM-dd"))
'DateCurrent
Dim strDateNow As String = DateAdd("d", 0, Now.ToLongDateString())
'While strDate < strDateNow
'ListBox1.Items.Add(strDateWeek)
'End While
ListBox1.Items.Add(strDateWeek)
End Sub
Example
I select on datetimepicker at "04/02/2013"
Output now: 11/02/2013
But I need Output each on weekly
11/02/2013
18/02/2013
25/02/2013 >>> To Current Week
I try loop While, But don't work.
Thanks you for your time. :)
You could do a while loop until the datetime is greater than today?
You want to use DateTime rather than Date, so you can compare to a DateTime.Now
You want to set your actual DatePicker value to a variable, else it will always be the same and you will just get an infinite loop.
Dim datePickerValue As DateTime = DateTimePicker.Value
Dim strDate As Date = DateTimePicker.Value.ToString("yyyy-MM-dd")
Dim strDateWeek As String
Dim strDateNow As String = DateAdd("d", 0, Now.ToLongDateString())
While datePickerValue < DateTime.Now()
strDateWeek = DateAdd("d", +7, datePickerValue.ToString("yyyy-MM-dd"))
datePickerValue = DateAdd("d", +7, datePickerValue.ToString("yyyy-MM-dd"))
ListBox1.Items.Add(strDateWeek)
End While
Just done it on my VS using your naming conventions and this works fine for me
It's been a long time since I didn't have used VB, but maybe I can help?
In your code, using while could be a wrong choice perhaps you could use a for with a break instead.
for I = 1 to 10
Dim strDateWeek As String = DateAdd("d", +7 * i, dateTimePicker.Value.ToString("yyyy-MM-dd"))
.
.
.
or
while(...)
I += 1
Dim strDateWeek As String = DateAdd("d", +7 * i, dateTimePicker.Value.ToString("yyyy-MM-dd"))
Hope that helps.
Try this:
Dim dtAux As Date = dateTimePicker.Value
Dim dtEnd As Date = Date.Today.AddDays(7 - dt.DayOfWeek)
While dtAux <= dtEnd
ListBox1.Items.Add(dtAux.ToString("yyyy-MM-dd"))
dtAux = dtAux.AddDays(7)
End While
The date dtEnd is the last day of the current week, if you want the loop to stop on the current date simply change the while condition to:
While dtAux <= Date.Today
I'm sure this has already been answered but no matter what i type relating to date time i get a different answer completely unrelated to what i need so bear with me ^_^
If i have a Date Time literal
dim IDate as DateTime = #6:21:00am#
and i create a date based on a day
dim iCurrentDate as DateTime = (2012,9,9,6,0,0)
now i already know that iCurrentDate is Greater than iDate because of the Date
,
How can i compare the times of these days?
For example, i want this to return that iDate is Greater than iCurrentDate because 6:21am is > 6:00 am
edit: I'm actually using c# i dunno why i wrote this question in vb.net , also it has a seconds component.
Test the Hour and Minute components individually
If IDate.Hour > iCurrentDate.Hour Then
Return True
ElseIf IDate.Hour = iCurrentDate.Hour And IDate.Minute > iCurrentDate.Minute Then
Return True
End If
Return False
Just use the TimeOfDay property:
Sub Main
Dim date1 As DateTime = #6:21:00am#
Dim date2 as New DateTime(2012,9,9,6,0,0)
Console.WriteLine("date1 > date2: {0}", (date1 > date2))
Console.WriteLine("date1.TimeOfDay > date2.TimeOfDay: {0}", (date1.TimeOfDay > date2.TimeOfDay))
End Sub
'Result:
'date1 > date2: False
'date1.TimeOfDay > date2.TimeOfDay: True
TimeSpan structure is here for you
Dim t1 as New TimeSpan(IDate.Hour, IDate.Minute, IDate.Seconds)
Dim t2 as New TimeSpan(ICurrentDate.Hour, ICurrentDate.Minute, ICurrentDate.Seconds)
if t2 > t1 then
....
You can compare the value of DateTime by converting it to minutes using the .TotalMinutes
if iCurrentDate.TotalMinutes > IDate.TotalMinutes Then
'iCurrectdate is greater
else
'IDate is greater
End If