Block Reference Hyperlink property in AutoCAD 2014 with VBA? - vba

Question

I have this .dwg file that has hundreds of block references.
I am trying to create hyperlink to a pdf file from all of the block references. The pdf are on my D drive.
For example, names of the block refernece are: '2:test', '26:test', '234:test'. Essentially hyperlink for
each point would be: '2:test' would hyperlink to D:\Reports\File-002.pdf;
'26:test' would hyperlink to D:\Reports\File-026.pdf; '234:test' would hyperlink to D:\Reports\File-234.pdf.
From block
references i get the number before the ':', and its matching pdf would be 'File-' followed by the number before ':' in 3 digits.
There are lot of these to do by hands, and i think i can program for this.
I have enough basic programming knowledge to manipulate the string to get my number and convert it in 3 digits. The question i have
and/or need help is with how to cycle through each block reference(for loop) on the file and be able to write to its hyperlink property? Is this even possible?
Before coming here i kind of looked at these links but they did not prove helpful:
Link1; Link2; Link3
Thanks for the hints
UPDATE
Private Sub CommandButton1_Click()
Dim ReadData As String
Open "C:\Desktop\Files\DesignFile.DWG" For Input As #1
Do Until EOF(1)
Line Input #1, ReadData
MsgBox ReadData 'Adding Line to read the whole line, not only first 128 positions
Loop
Close #1
End Sub

Answer 1

You can try this:
Dim stringInput
stringInput = "2:test', '26:test', '234:test"
stringSplit = Split(stringInput, ",")
For i = 0 To UBound(stringSplit)
Debug.Print (stringSplit(i))
Next i
Outputs:
2:test'
'26:test'
'234:test

Answer 2

you can try this
Option Explicit
Sub test()
Dim acBlockRef As AcadBlockReference
Dim baseStrng As String
baseStrng = "D:\Reports\File-"
For Each acBlockRef In BlockRefsSSet("BlockRefs")
acBlockRef.Hyperlinks.Add("PDF").URL = baseStrng & Format(Left(acBlockRef.Name, InStr(acBlockRef.Name, "-") - 1), "000") & ".pdf"
Next acBlockRef
ThisDrawing.SelectionSets("BlockRefs").Delete
End Sub
'-----------------------------------------------------------------
'helper functions
'------------------
Function BlockRefsSSet(ssetName As String, Optional acDoc As Variant) As AcadSelectionSet
'returns a selection set of all block references in the passed drawing
Dim acSelSet As AcadSelectionSet
Dim Filtertype(0) As Integer
Dim Filterdata(0) As Variant
Set BlockRefsSSet = CreateSelectionSet(ssetName, acDoc)
Filtertype(0) = 0: Filterdata(0) = "INSERT"
BlockRefsSSet.Select acSelectionSetAll, , , Filtertype, Filterdata
End Function
Function CreateSelectionSet(selsetName As String, Optional acDoc As Variant) As AcadSelectionSet
'returns a selection set with the given name
'if a selectionset with the given name already exists, it'll be cleared
'if a selectionset with the given name doesn't exist, it'll be created
Dim acSelSet As AcadSelectionSet
If IsMissing(acDoc) Then Set acDoc = ThisDrawing
On Error Resume Next
Set acSelSet = acDoc.SelectionSets.Item(selsetName) 'try to get an exisisting selection set
On Error GoTo 0
If acSelSet Is Nothing Then Set acSelSet = acDoc.SelectionSets.Add(selsetName) 'if unsuccsessful, then create it
acSelSet.Clear 'cleare the selection set
Set CreateSelectionSet = acSelSet
End Function
'-----------------------------------------------------------------
with following notes:
you can't have a colon (":") in a block name
so I used a hypen ("-") as its substitute
every block reference object will be attached the URL ("D:\Reports\File-nnn.pdf") associated with the block name it's a reference of