Excel VBA adding data to a chart

chartsexcelvba

Hello I have a little question for adding data to an existing chart.

Now I have a worksheet containing a data series with months for the years in the 2nd row of the sheet. So the months are for example B2 1.2017, C2 2.2017, and in the rows 3,4,5,6,7 and 8 there is always data for that month.

Now I just want my macro to add the new Month plus the data of the rows below to my existing chart.

the code I have so far is this:

Worksheets("Summary").ChartObjects("Chart").Activate
   ActiveChart.SeriesCollection.Add _
   Source:=Worksheets("Summary").Range("B2:B8")

now this does just create new data series but there is actually no new data added to the chart.

Best Answer

The code below might seem a little long, but it's the safest way to add a new Series with Data to an existing Chart.

I'm setting all the necessary Objects so the code will be as "safe-proof" as can be.

Code

Option Explicit

Sub AddSeriestoChart()

Dim ws As Worksheet
Dim ChtRng As Range
Dim ChtObj As ChartObject
Dim Ser As Series

' set the Worksheet object
Set ws = ThisWorkbook.Worksheets("Summary")

' Set the Chart Object
Set ChtObj = ws.ChartObjects("Chart")

' Set the Range of the Chart's source data
Set ChtRng = ws.Range("B2:B8")

With ChtObj
    ' add a new series to chart
    Set Ser = .Chart.SeriesCollection.NewSeries

    ' set the source data of the new series
    Ser.Values = "=" & ChtRng.Address(False, False, xlA1, xlExternal)
End With

End Sub

Edit 1: to modify existing Series data, use something like the code below :

With ChtObj          
    For i = 1 To .Chart.SeriesCollection.Count
        Set Ser = .Chart.SeriesCollection(i)

        ' set the source data of the new series
        Set ChtRng = ws.Range("B" & i + 2)
        Ser.Values = "=" & ChtRng.Address(False, False, xlA1, xlExternal)

        Set ChtRng = Nothing
    Next i
End With

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You can use a library called ExcelLibrary. It's a free, open source library posted on Google Code:

ExcelLibrary

This looks to be a port of the PHP ExcelWriter that you mentioned above. It will not write to the new .xlsx format yet, but they are working on adding that functionality in.

It's very simple, small and easy to use. Plus it has a DataSetHelper that lets you use DataSets and DataTables to easily work with Excel data.

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Here are a couple links for quick reference:
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Here some example code for ExcelLibrary:

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Excel – way to crack the password on an Excel VBA Project

You can try this direct VBA approach which doesn't require HEX editing. It will work for any files (*.xls, *.xlsm, *.xlam ...).

Tested and works on:

Excel 2007
Excel 2010
Excel 2013 - 32 bit version
Excel 2016 - 32 bit version

Looking for 64 bit version? See this answer

How it works

I will try my best to explain how it works - please excuse my English.

The VBE will call a system function to create the password dialog box.
If user enters the right password and click OK, this function returns 1. If user enters the wrong password or click Cancel, this function returns 0.
After the dialog box is closed, the VBE checks the returned value of the system function
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The code below swaps the memory of the original function used to display the password dialog with a user defined function that will always return 1 when being called.

Using the code

Please backup your files first!

Open the file(s) that contain your locked VBA Projects

Create a new xlsm file and store this code in Module1

code credited to Siwtom (nick name), a Vietnamese developer

Option Explicit

Private Const PAGE_EXECUTE_READWRITE = &H40

Private Declare Sub MoveMemory Lib "kernel32" Alias "RtlMoveMemory" _
        (Destination As Long, Source As Long, ByVal Length As Long)

Private Declare Function VirtualProtect Lib "kernel32" (lpAddress As Long, _
        ByVal dwSize As Long, ByVal flNewProtect As Long, lpflOldProtect As Long) As Long

Private Declare Function GetModuleHandleA Lib "kernel32" (ByVal lpModuleName As String) As Long

Private Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As Long, _
        ByVal lpProcName As String) As Long

Private Declare Function DialogBoxParam Lib "user32" Alias "DialogBoxParamA" (ByVal hInstance As Long, _
        ByVal pTemplateName As Long, ByVal hWndParent As Long, _
        ByVal lpDialogFunc As Long, ByVal dwInitParam As Long) As Integer

Dim HookBytes(0 To 5) As Byte
Dim OriginBytes(0 To 5) As Byte
Dim pFunc As Long
Dim Flag As Boolean

Private Function GetPtr(ByVal Value As Long) As Long
    GetPtr = Value
End Function

Public Sub RecoverBytes()
    If Flag Then MoveMemory ByVal pFunc, ByVal VarPtr(OriginBytes(0)), 6
End Sub

Public Function Hook() As Boolean
    Dim TmpBytes(0 To 5) As Byte
    Dim p As Long
    Dim OriginProtect As Long

    Hook = False

    pFunc = GetProcAddress(GetModuleHandleA("user32.dll"), "DialogBoxParamA")


    If VirtualProtect(ByVal pFunc, 6, PAGE_EXECUTE_READWRITE, OriginProtect) <> 0 Then

        MoveMemory ByVal VarPtr(TmpBytes(0)), ByVal pFunc, 6
        If TmpBytes(0) <> &H68 Then

            MoveMemory ByVal VarPtr(OriginBytes(0)), ByVal pFunc, 6

            p = GetPtr(AddressOf MyDialogBoxParam)

            HookBytes(0) = &H68
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            HookBytes(5) = &HC3

            MoveMemory ByVal pFunc, ByVal VarPtr(HookBytes(0)), 6
            Flag = True
            Hook = True
        End If
    End If
End Function

Private Function MyDialogBoxParam(ByVal hInstance As Long, _
        ByVal pTemplateName As Long, ByVal hWndParent As Long, _
        ByVal lpDialogFunc As Long, ByVal dwInitParam As Long) As Integer
    If pTemplateName = 4070 Then
        MyDialogBoxParam = 1
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        RecoverBytes
        MyDialogBoxParam = DialogBoxParam(hInstance, pTemplateName, _
                           hWndParent, lpDialogFunc, dwInitParam)
        Hook
    End If
End Function

Paste this code under the above code in Module1 and run it

Sub unprotected()
    If Hook Then
        MsgBox "VBA Project is unprotected!", vbInformation, "*****"
    End If
End Sub

Come back to your VBA Projects and enjoy.