Traffic Survey Field - +/-1 increment to field on every button click - Help Please!

[ChilliChowder]

Hello All,



First time poster and learning Access as I go, so please be gentle!

I have a form that I am designing in Access 2000 and copying to a handheld tablet for a carriageway condition survey.

As part of this survey we want to count the number of cars passing during a ten minute period on site. This data will be recorded in a 'Traffic Count' field which currently consists of a combo box with a drop down containing values 1-60. The intention being that the surveyor enters the number of cars once 10 mins is up.

However, because the surveyor will also be concentrating on other things while on site I don't want them to need to count every car, but rather just records a 'click' every time car passes, and on each click the form increases the value of 'Traffic Count' field by 1.

I would like to add a pair of +/- buttons that would result in the 'Traffic Count' field being increase/decreased by 1 each time they are clicked. (I want to add the ability to decrease just in case of mistakes).

I imagine this is quite straight forward and I have had a good look online but failed to find exactly what I need - and I do not have the knowledge yet to alter similar code I did find.

Thanks - All help much appreciated!

Dan

[Missinglinq]

Something like this will do it:

Private Sub PlusButton_Click()
 Me.TrafficCount = Nz(Me.TrafficCount, 0) + 1
End Sub

Private Sub MinusButton_Click()
If Not IsNull(Me.TrafficCount) And Me.TrafficCount <> 0 Then
  Me.TrafficCount = Me.TrafficCount - 1
End If
End Sub

If you're pressed for space on your Form, there's also an ActiveX Control named UpDown Control (at least that's the name in 2007; in earlier versions it was called a Spinbutton Control) that is designed for this. That code would be like this:

Private Sub TrafficUpDown_UpClick()
  Me.TrafficCount = Nz(Me.TrafficCount, 0) + 1
End Sub

Private Sub TrafficUpDown_DownClick()
If Not IsNull(Me.TrafficCount) And Me.TrafficCount <> 0 Then
  Me.TrafficCount = Me.TrafficCount - 1
End If
End Sub

But using larger, custom buttons with the first two code samples above may be better, given that this is being used on a handheld device.

Linq ;0)>

[Bob Fitz]

Create a button. In the On Click event of the button, use this:

Me.txtCounter = Nz(Me.txtCounter, 0) + 1

Change txtCounter to the name of the text box in which the "count" is to be displayed.

[Bob Fitz]

Sorry missinglinq,
Your reply wasn't there when I started.

[Missinglinq]

Don't you hate when that happens, Bob? My hound invariably comes in, begging to go out, when I'm writing a complicated response, and I always forget to check for new replies before hitting the 'send' button!

Linq ;0)>

[Bob Fitz]

Don't you hate when that happens, Bob? My hound invariably comes in, begging to go out, when I'm writing a complicated response, and I always forget to check for new replies before hitting the 'send' button!

Exactly, but my distraction wasn't a dog. It was my wife.

[Missinglinq]

Well, we won't go there!

[Bob Fitz]

Probably best

[ChilliChowder]

Guys,

Thank you both very much. Both worked great - Much appreciated....

I imagine I'll be back very soon :-)

Dan

[Bob Fitz]

Guys,
Thank you both very much. Both worked great - Much appreciated....

Glad we could help.

I imagine I'll be back very soon :-)

You will be welcome. I'm sure someone will be here.

[ChilliChowder]

Back sooner than intended... In my rush to get out of the office yesterday I didn't actually test this but didn't want to leave it another day without thanking you both - and thus thanked you precipitously! Foolish.

So now I am back with my tail between my legs as I am getting a compile error - 'method or data not found'

I have only added the plus button so far, the code is as follows:

Private Sub Plusbutton_Click()
Me.SPN_Traffic_Count = Nz(Me.SPN_Traffic_Count, 0) + 1
End Sub

When the debugger runs the first underlined section is appearing highlighted in yellow.

I have added and re-added the button and code several times hoping for a different result, as well as playing around with the field type/values in hope that something will have an effect - No luck.

Any suggestions or help much appreciated.

Thanks again

Dan

[Missinglinq]

Well, you said you'd be back!

With

Private Sub Plusbutton_Click()

being hi-lighted, and the given error message, it would seem that Access cannot find a Command Button named Plusbutton. Check to make sure that you changed the name of the button to this after placing it on your Form.

Linq ;0)>

[JeroenMioch]

oops, miss read something :P

[ChilliChowder]

Thanks for the reply Linq - I was back sooner than expected

The command button is defintely named 'Plusbutton'. I actually created the event command by right clicking on the button and then going to On Click event, so Access created the 'Private sub Plusbutton' text itself.

I forgot to add in my previous post that the second underlined section 'SPN_Traffic_Count'is highlighted in blue when the debugger first runs - before I click 'OK' and the Private Sub Plusbutton_Click() is highlighted in yellow. Don't know if that tells you anything else?

By the way - Sorry I can't add any screen shot images, our computer system is still Windows 2000 and our version of Internet Explorer doesn't like these forums!

[Missinglinq]

Screen shots are very seldom of any value when trouble-shooting long distance, as it were. Attaching a copy of your smile, on the other hand, would be very helpful.

To attach your file for analysis:

• Make a copy of your file
• Remove confidential data
• Do a Compact & Repair
• Zip file if over 2 mb
• Attach file to a post. Attachment Manager is below the Advanced post editor window.

If you'd care to do that I'd be glad to take a look at it. The Access Gnomes have a bad habit of hi-lighting a line other than the real culprit when things go awry!

Linq ;0)>