Using SUM() in VBA

Question

If I have a set of cells in a worksheet that I want to add up, I can use the formula:

=SUM(Sheet1!A1:A10)

To do this in a sub, I would use:

Sub example1()
    Dim r As Range, v As Variant

    Set r = Sheets("Sheet1").Range("A1:A10")
    v = Application.WorksheetFunction.Sum(r)
End Sub

If, however, I want to add up a single cell across many worksheets, I use the formula:

=SUM(Sheet1:Sheet38!B2)

In VBA this line fails miserably, as explained in Specify an Excel range across sheets in VBA:

Sub dural()
    v = Application.WorksheetFunction.Sum("Sheet1:Sheet3!B2")
End Sub

I have two workarounds. I can the the sum by programming a loop:

Sub example2()
    Dim i As Long
    Dim v As Variant

    v = 0
    For i = 1 To 38
        v = v + Sheets(i).Range("B2")
    Next i
End Sub

or by using Evaluate():

v = Evaluate("Sum(Sheet1:Sheet3!B2)")

Is it possible to use Application.WorksheetFunction.Sum() for this calculation, or should I stick the loop?

Solution 1

I believe the issue with the worksheetfunction.sum is that it needs arguments to evaluate not string. WorksheetFunction.Sum("Sheet1!A1:A3") fails as well. However, this succeeds

Application.WorksheetFunction.Sum(Sheet1.Range("A1"), Sheet2.Range("A1"))

The Ranges could be whatever you like.

Solution 2

 Sub SumWorksheets()
    Dim ws As Worksheet
    Dim v As Variant
    For Each ws In ThisWorkbook.Worksheets
'    If ws.Name <> ThisWorkbook.ActiveSheet.Name Then ' (Sum other sheets only)
    If ws.Name <> "" Then
    Application.DisplayAlerts = False
    v = v + ws.Range("B2")
    Application.DisplayAlerts = True
    End If
    Next ws
    MsgBox v
    End Sub

Solution 3

I was able to get it to work just by the line:

Cells(x,y) = WorksheetFunction.sum(range(a,b:a,d))

Solution 4

You need to use the loop to perform the calculation across all of the sheets, it's the most efficient way by the looks of things. As mentioned above you can type each range separately instead.

Might be worth converting the range your adding up to a double (or single, integer, etc) because sometimes VBA reads numbers as text.

v = v + Cdbl(Sheets(i).Range("B2"))

The reason why you're having issues with Application.WorksheetFunction.Sum("Sheet1:Sheet3!B2") is because if you type that formula into Excel, the range 'Sheet1:Sheet3!B2' won't be recognised by excel.

To use a Application.WorksheetFunction it has to work in excel outside of VBA.

Hope that helps.

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Comments

[airstrike]

To be fair, the range in the screenshot has a typo. There's an extra ! before the colon.

[L. F.]

Please include some explanation along with your code.

[Abayomi Apetu]

This works but that will only be valid for adding values in two cells but to make the function over a range of cells I used this work around string rng = "D2:D" + totalRows+1; //calculate and return the average/mean as a float with Excel Worksheetfunction return (float)app.WorksheetFunction.Average(propertySheet.Range[rng‌​]);