extract times in ms access

I have textboxes that has times entered in this format 18 Hours 10 Minutes
i would like to extract the hours and minutes then have the sum of text boes displayed in another box.
thanks
SvgmassiveAsked:
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SimonCommented:
Please provide a few more examples of the time format.
Could it also be 234 hours 5 minutes (>24 hours, hours or minutes without the leading zero)?
could it also be 0 hours 0 minutes?
could it also be 15 hours (whole number of hours, so no minutes specified)
Is there any validation on the text box or could the values also include typos?
Rey Obrero (Capricorn1)Commented:
try this sample db

click Process button

you can also change the values the is on display on the three  top textboxes then click process button

result is displayed on the 4th textbox
Database1--Q-28581983-.accdb
SimonCommented:
Nice one Rey! I didn't know val() could be used like that (to get a numeric value from a string that starts with a number).
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PatHartmanCommented:
Val() only pulls out the first numeric string so it won't help you in this case since you have two embedded strings.  Of course, you could use two fields that are defined as numeric rather than a mushed text string and not have this problem at all.
Rey Obrero (Capricorn1)Commented:
<Val() only pulls out the first numeric string so it won't help you in this case since you have two embedded strings. >

it will help, if you know how to use them.
SimonCommented:
Yes, I tried Rey's solution and it works - otherwise I wouldn't have congratulated him. Good use of both Val() and Split().

The only fail I got was if I entered 1 hour 5 minutes (without the 's' on the hours). I agree with Pat that a better way to enter the data would be as separate numeric fields for hours and minutes, or a single hh:mm format datetime field with validation, but given the question as stated I think Rey's solution is ace.
PatHartmanCommented:
As long as you're happy.  I would have simply split the field and not used Val at all.  I've been burned by it on more than one occasion.  This one seems safe enough although you should be aware that certain very strange expressesions are considered to be numeric by Val() such as

print val("1e3.2")
 1000

Looks like val is interpreting this as scientific notation.  I discovered the issue in an application that managed drawings for a building company and then again in an application that worked with part numbers.
SimonCommented:
Thanks for the salutory warning on Val(). I don't think I've ever used it myself, but I was interested to see it in Rey's code.
Gustav BrockCIOCommented:
> The only fail I got was if I entered 1 hour 5 minutes (without the 's' on the hours).
And so will 1 minute fail.

You'll have to validate the content of the textboxes. Then it is a bit simpler to convert to time values and sum these. Finally, apply a generice function to format the sum like the one below; you can, of course, modify it to return any format.
Private Sub Command8_Click()

    Me.Text4 = FormatHourMinute(fComputeTime())

End Sub

Private Sub Form_Load()

Me.Text1 = "18 hours 10 minutes"
Me.Text2 = "1 hour 10 minutes"
Me.Text3 = "18 hours 1 minute"

End Sub

Private Function fComputeTime() As Date

    Dim ctl     As Control
    Dim datTime As Date

    For Each ctl In Me.Controls
        If ctl.ControlType = acTextBox Then
            If InStr(ctl.Value, "hour") > 0 And InStr(ctl.Value, "minute") > 0 Then
                datTime = datTime + TimeSerial(CLng(Split(ctl.Value, " ")(0)), CLng(Split(ctl.Value, " ")(2)), 0)
            End If
        End If
    Next

    fComputeTime = datTime

End Function

Public Function FormatHourMinute( _
  ByVal datTime As Date, _
  Optional ByVal strSeparator As String = ":") _
  As String
  
' Returns count of days, hours and minutes of datTime
' converted to hours and minutes as a formatted string
' with an optional choice of time separator.
'
' Example:
'   datTime: #10:03# + #20:01#
'   returns: 30:04
'
' 2005-02-05. Cactus Data ApS, CPH.

  Dim strHour       As String
  Dim strMinute     As String
  Dim strHourMinute As String
  
  strHour = CStr(Fix(datTime) * 24 + Hour(datTime))
  ' Add leading zero to minute count when needed.
  strMinute = Right("0" & CStr(Minute(datTime)), 2)
  strHourMinute = strHour & strSeparator & strMinute
  
  FormatHourMinute = strHourMinute
  
End Function

Open in new window

/gustav

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SvgmassiveAuthor Commented:
gustav you are correct thanks
Gustav BrockCIOCommented:
You are welcome!

/gustav
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