topic Re: iLogic Code runs only once per drawing file in Inventor Programming Forum

iLogic Code runs only once per drawing file

rnandan — Thu, 04 Dec 2025 19:04:56 GMT

I am attempting to update the font and font size of a general note object in a drawing. The note contains text in different fonts and sizes.
From the code below I was able to change it once. I retried the code with a different font and size but the text format does not change.
It works on a different drawing though, but exactly once. I'm new to writing iLogic, so not sure what basic thing I'm missing.

Dim oDrawDoc As Inventor.DrawingDocument = ThisApplication.ActiveDocument Dim oPickedDrawingNote As Inventor.DrawingNote = ThisApplication.CommandManager.Pick(SelectionFilterEnum.kDrawingNoteFilter, "Select text") 'oPickedDrawingNote.HorizontalJustification = HorizontalTextAlignmentEnum.kAlignTextCenter Dim eText As String = oPickedDrawingNote.FormattedText oPickedDrawingNote.FormattedText = "<StyleOverride Font='Tahoma' FontSize='0.12*2.54' Bold='False' Underline='False'>" & eText & "</StyleOverride>" oDrawDoc.Update()

Re: iLogic Code runs only once per drawing file

Curtis_W — Thu, 04 Dec 2025 19:13:26 GMT

@rnandan, I think you just want to use the Text rather than FormatedText for this line, and everything else can stay the same.

Hope that helps, Curtis

Dim eText As String = oPickedDrawingNote.Text

Re: iLogic Code runs only once per drawing file

Curtis_W — Thu, 04 Dec 2025 19:51:18 GMT

If you want to have a toggle, you can use something like this:

Dim oDrawDoc As Inventor.DrawingDocument = ThisApplication.ActiveDocument

While True

	Dim oPickedDrawingNote As Inventor.DrawingNote = ThisApplication.CommandManager.Pick(SelectionFilterEnum.kDrawingNoteFilter, "Select text (ESC to continue)")

	If IsNothing(oPickedDrawingNote) Then Exit While

	'oPickedDrawingNote.HorizontalJustification = HorizontalTextAlignmentEnum.kAlignTextCenter
	Dim eText As String = oPickedDrawingNote.Text
	
	Logger.Info(oPickedDrawingNote.FormattedText)
	
	If oPickedDrawingNote.FormattedText.Contains("Tahoma") Then
		oPickedDrawingNote.FormattedText = "<StyleOverride Font='Segoe Print' FontSize='0.12*2.54' Bold='False' Underline='False'>" & eText & "</StyleOverride>"
	Else 'if it's anything else, format like this:
		oPickedDrawingNote.FormattedText = "<StyleOverride Font='Tahoma' FontSize='0.12*2.54' Bold='False' Underline='False'>" & eText & "</StyleOverride>"
	End If

	oDrawDoc.Update()

End while

Note too the logger line output might be something to be aware of, for seeing the formatting, etc.

See link for info about using the logger if that's new to you:
https://help.autodesk.com/view/INVNTOR/2026/ENU/?guid=GUID-BE996AA3-DE49-4765-86A7-129DD7B42A4A

Re: iLogic Code runs only once per drawing file

rnandan — Fri, 05 Dec 2025 02:51:35 GMT

I changed the declaration for eText to Text rather than FormattedText. The code runs and changes the Font and size reliably but now all the break lines are gone. The multiline text is just one single line.

Dim eText As String = oPickedDrawingNote.Text oPickedDrawingNote.FormattedText = "<StyleOverride Font='Tahoma' FontSize='0.3' Bold='False' Underline='False'>" & eText & "</StyleOverride>"

Out of curiosity I tried the following as well where the FormattedText was swapped. The result was that the fonts and font size changed every time, but the textbox now contained the xml tags as well and one single line again.

Dim eText As String = oPickedDrawingNote.FormattedText oPickedDrawingNote.Text = "<StyleOverride Font='Tahoma' FontSize='0.3' Bold='False' Underline='False'>" & eText & "</StyleOverride>"

So. my observation is that "FormattedText" cannot come consecutively. I'm curious to know why.

Re: iLogic Code runs only once per drawing file

jnowel — Fri, 05 Dec 2025 07:04:14 GMT

For a single line text (w/o any StyleOverrides), the "oPickedDrawingNote.Text" and "oPickedDrawingNote.FormattedText" is the same

That is the reason why your code initially works the first time. After the code ran, Text and FormattedText won't be the same anymore

For multi-line text (w/o any StyleOverrides), the "oPickedDrawingNote.Text" and "oPickedDrawingNote.FormattedText" is NOT the same .
FormattedText has additional line breaks "<Br\> inside that isn't shown in Text property.

As for a solution, you can try below code

I'm not too much familiar with the XML formatting, but it seems it is smart enough to apply the styleoverrides after the line breaks.
as an example:

the Formatted text of that is

TEXT<Br/>TEST

after the rule, the expected value of the FormattedText is

but surprising enough, the FormattedText Property is able to "correct" it to

-----------
btw, I think it cannot do math expressions for the font size in XML format directly. so have to separate it (or just assign the computed value)

so instead of doing it as

oPickedDrawingNote.FormattedText = "<StyleOverride Font='Tahoma' FontSize='0.12*2.54' Bold='False' Underline='False'>" & eText & "</StyleOverride>"

do it as

oPickedDrawingNote.FormattedText = "<StyleOverride Font='Tahoma' FontSize='" & 0.12*2.54 & "' Bold='False' Underline='False'>" & eText & "</StyleOverride>"

Re: iLogic Code runs only once per drawing file

rnandan — Fri, 05 Dec 2025 07:30:28 GMT

Hi jnowel,
The code returned a compile error.

Error on Line 9 : Argument matching parameter 'separator' narrows from 'String' to '1-dimensional array of Char'.

Re: iLogic Code runs only once per drawing file

jnowel — Fri, 05 Dec 2025 11:46:12 GMT

weird, it's working on my end w/o issues in Inventor 2026

anyway, try this instead

@rnandan can you check this new line12

Re: iLogic Code runs only once per drawing file

rnandan — Fri, 05 Dec 2025 11:27:47 GMT

I'm on Inventor 2024. The new code gave an error on line 13

Argument 'Length' must be greater or equal to zero.

Re: iLogic Code runs only once per drawing file

jnowel — Fri, 05 Dec 2025 11:44:28 GMT

weird. i though the current line12 will prevent that issue on line13.

can you send me the idw/dwg just to check what i missed?

anyway, i'll edit line12 to a different one in a minute

Re: iLogic Code runs only once per drawing file

Curtis_W — Fri, 05 Dec 2025 15:45:17 GMT

@jnowel wrote:

I'm not too much familiar with the XML formatting...

@jnowel, in case it's helpful you can find some info for this online here:
https://help.autodesk.com/view/INVNTOR/2025/ENU/?guid=GUID-915B75BA-4696-4fc7-A2C6-54B2BACDE7E1

Or you can find the same reference material, but a bit easier to read in your local API help by searching the API help for "Text Tags" or "XML Tags for FormattedText", etc.

Re: iLogic Code runs only once per drawing file

Curtis_W — Fri, 05 Dec 2025 16:02:56 GMT

@rnandan wrote:

I'm on Inventor 2024. The new code gave an error on line 13

Argument 'Length' must be greater or equal to zero.

@rnandan , here is a version of @jnowel's code with some logger lines, this might help you determine what the issue is with line 13 ?

iLogic Logger reference: https://help.autodesk.com/view/INVNTOR/2026/ENU/?guid=GUID-BE996AA3-DE49-4765-86A7-129DD7B42A4A

Dim oDrawDoc As Inventor.DrawingDocument = ThisApplication.ActiveDocument
Dim oPickedDrawingNote As Inventor.DrawingNote = ThisApplication.CommandManager.Pick(SelectionFilterEnum.kDrawingNoteFilter, "Select text")

'Logger.Info("Method2")
Dim eText As String = oPickedDrawingNote.FormattedText
'Logger.Info(eText)

'Remove All the styleoverrides
'Dim sText As String() = eText.Split("<StyleOverride ", StringSplitOptions.RemoveEmptyEntries)
Dim sText As String() = eText.Split("<StyleOverride ")
Logger.Info(sText.Length & " items in the split array:")
For Each subText In sText
	Logger.Info(subText)
	If InStr(subText, ">") < 1 Then Continue For
	Dim sOldStyle As String = Left(subText, InStr(subText, ">") -1)
	eText = eText.Replace("<StyleOverride " & sOldStyle & ">", String.Empty)
	eText = eText.Replace("</StyleOverride>", String.Empty)
Next

'Apply New Style Overrides
oPickedDrawingNote.FormattedText = "<StyleOverride Font='Tahoma' FontSize='0.3' Bold='False' Underline='False'>" & eText & "</StyleOverride>"

Re: iLogic Code runs only once per drawing file

jnowel — Sat, 06 Dec 2025 06:47:43 GMT

I think i figured out why my previous line12 introduced some errors.
i only considered empty strings as the other values of subText which isn't the case

If Len(subText) < 1 Then Continue For

a single line with a combination of no styleoverride and styleoverrides can cause that error.

and with the link @Curtis_W gave about the XML tags,
it reminded me that certain characters/symbols need their styleoverrides. and removing the styleoverride will cause an issue
the symbols are mostly these ones.

as for the updated code. it will look like this:

Dim oDrawDoc As Inventor.DrawingDocument = ThisApplication.ActiveDocument Dim oPickedDrawingNote As Inventor.DrawingNote = ThisApplication.CommandManager.Pick(SelectionFilterEnum.kDrawingNoteFilter, "Select text") 'Logger.Info("Method3") Dim eText As String = oPickedDrawingNote.FormattedText 'Logger.Info(eText) 'Change All the styleoverrides, add Styleovverride when there is none applied Dim sText As String() = eText.Split("<StyleOverride ") Dim sNewStyle As String = "Font='Tahoma' FontSize='0.3' Bold='False' Underline='False'" Dim sNewStyleSymbols As String = "Font='AIGDT' FontSize='0.3' Bold='False' Underline='False'" 'this is used for the 'special' drafting symbols that needs the AIGDT font to work Dim eTextNew As String = String.Empty For Each subText In sText 'Logger.Info(subText) If Not subText.Contains("'>") Then 'This infers that no style override is found, so apply the styleoverride subText = "<StyleOverride " & sNewStyle & ">" & subText & "</StyleOverride>" Else 'With Styleoverrides Dim sOldStyle As String = Left(subText, InStr(subText, ">") -1) If sOldStyle.Contains("Font='AIGDT'") Then subText = "<StyleOverride " & subText.Replace(sOldStyle, sNewStyleSymbols) Else subText = "<StyleOverride " & subText.Replace(sOldStyle, sNewStyle) End If 'Now we need to check if the subText has some portion w/o any styleoverrides Dim sText2 As String() = subText.Split("</StyleOverride>") sText2(0) = sText2(0) & "</StyleOverride>" 'this is the portion where the current styleoverride applies If sText2.Length > 1 Then 'this is just to prevent some error (as i'm not 100% sure the Split will always return 2 items as 2nd item, sText2(1), might be an empty string). sText2(1) = "<StyleOverride " & sNewStyle & ">" & sText2(1) & "</StyleOverride>" 'this portion is something the styleoverride isn't applied yet so add the styleoverride subText = sText2(0) & sText2(1) Else subText = sText2(0) End If End If eTextNew &= subText Next 'Apply New Style Overrides oPickedDrawingNote.FormattedText = eTextNew