C# Graph Beta API: "generalException" when updating SharePoint Hyperlink (URL) field

Question

I'm using Microsoft Graph SDK to update a SharePoint list item, and I consistently get a ServiceException with the error:

Code: generalException  
Message: General exception while processing  

I'm 100% sure the issue is related to a Hyperlink column named PDFDocument.

What I'm Doing:

I'm building a FieldValueSet and setting the values like this in C#:

fVS.AdditionalData["PDFDocument"] = $"{link}, {ecrText}";

Where:

• link is a valid SharePoint document URL
• ecrText is a short string like "TQ_010"
• The PDFDocument column in the SharePoint list is of type Hyperlink (URL). I also verified that "PDFDocument" is the correct internal name of the field.

What I Tried:

Updating only the PDFDocument field (no other fields)

Verified the value is in the format: "url, description"

Ensured the list ID, item ID, and all context values are correct

Other fields (like Title or Status) update fine

What I Need Help With:

Is there a different expected format for hyperlink fields via Microsoft Graph?

Are there known issues with FieldValueSet and SharePoint URL fields?

Any workarounds or alternative approaches (my goal is to link a pdf document or preview it in the list)

Thanks in advanced for anyone who tries to help.

Answer 1

As of now, Graph API does not fully support updating these column types directly. However, you might need to use SharePoint REST API as a workaround. Here is a similar issue with yours to reference

https://sharepoint.stackexchange.com/questions/88540/how-do-i-update-a-hyperlink-field-using-the-rest-api

Hope this helps.

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Answer 2

Hi @Mark Dicks

Thanks for posting question on Microsoft Forum

Can you please try v1.0 version of Microsoft Graph as beta version is still in its testing stages and is yet to enter in fully production stage ?

Hope this helps.

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