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Check for the existence of data labels

Dear Experts:

below macro ...
... deletes any data labels from all data series of all charts on the active worksheet.

I wonder whether the macro could check at the beginning ...
... for the existence of any data labels (1 to n) and if there are none at all come up with a msgbox telling the user ('All data labels have already been deleted!').

Help is much appreciated.Thank you very much in advance.

Regards, Andreas
Sub DataLabels_Remove()
   
     Dim ChtObj As ChartObject
     Dim i As Integer
     Dim ser As Series
     i = 0

For Each ChtObj In ActiveSheet.ChartObjects
    With ChtObj.Chart
        For Each ser In .SeriesCollection
               ser.ApplyDataLabels (xlDataLabelsShowNone)
        Next ser
    End With
Next
   
End Sub

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AndreasHermle
Asked:
AndreasHermle
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2 Solutions
 
Zack BarresseCEOCommented:
Hello,

I don't think you can check for their existence unless you loop through all the series, since they're independent.  But you can take them all away without your inner loop...

    For Each ChtObj In ActiveSheet.ChartObjects
        ChtObj.Chart.ApplyDataLabels (xlDataLabelsShowNone)
    Next

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0
 
dlmilleCommented:
firefytr is correct as it seems you have to loop through the series to check each one.  I do the same (turn all off, then add back) when I work datalabels.

However, the exact answer to your question is YES - there is a HasDataLabels property:

The attached code will printout to the immediate window each chart that has or doesn't have datalabels by series.

 
Sub CheckDataLabels()
   
     Dim ChtObj As ChartObject
     Dim i As Integer
     Dim ser As Series
     Dim datalabelFlg As Boolean
     i = 0

For Each ChtObj In ActiveSheet.ChartObjects
    With ChtObj.Chart
        For Each ser In .SeriesCollection
            If ser.HasDataLabels Then
                Debug.Print "Chart " & .Name & " series " & ser.Name & " already has datalabels"
            Else
                Debug.Print "Chart " & .Name & " series " & ser.Name & " does not have datalabels"
            End If
        Next ser
    End With
Next

End Sub

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Dave
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Zack BarresseCEOCommented:
@Dave: Good point.  I was assuming by "in the beginning" as in "prior to the series loop".  I guess it depends on the interpretation of the OP's question in regards to an accurate answer.  Hence the one-liner I posted to avoid the series looping.  :)
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dlmilleCommented:
@firefytr - I prefer your approach, if and only when I am indifferent to dropping existing data labels.  If, however, the user has worked on the datalabels (re: font, colors, etc.) then knowing if they exist or not might be a desire.

If there was a way to SUM the array .seriescollection() and property .hasdatalabels then you could do that in one step as well.

I couldn't figure out how to do that.  I was trying

application.sum(application.index(.seriescollection.haslabels),0,2) but that won't work.  unless you can sum a single property in that array of .seriescollection, you still have to loop - or just drop all data labels as your solution suggested.

Dave
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Zack BarresseCEOCommented:
Sure.  I was talking purely in the context of the OP's question.  
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AndreasHermleAuthor Commented:
Dear firefytr, dlmille:

thank you very much for your overwhelming support. I will test both codes and get back to you with a feedback tomorrow.

Thank you very much again, Andreas
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Rory ArchibaldCommented:
FYI, HasDataLabels is not reliable in 2007, in my experience (I haven't tested in 2010), as it will return False if one datalabel has been added to a point, rather than to the entire series.
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AndreasHermleAuthor Commented:
Dear all,

thank you very much for your great and professional help. I really appreciate it.

Regards, Andreas
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