Just want to share something in regards to starting workflow using the Workflow Manager in code.
I have built a SPD reusable workflow for a content type.
I then add this workflow to my list in my site.
As I want to be able to trigger this workflow anonymously, I have to run the workflow using WorkflowManager instead of the standard auto start from UI (Otherwise the workflow will be created but will not run)
Originally I used the ItemAdded event receiver, then use this piece of code:
But my workflows only get triggered for some records (intermittently). When I run the debugging, I can see that a weird error is thrown:
An exception of type 'Microsoft.SharePoint.SPException' occurred in Microsoft.SharePoint.dll but was not handled in user code
FAILED hr detected (hr = 0x8102008a)
in the log : COMException: 0x8102008a
Looking around for solution I couldn't find the answer.
After some trials and errors, I noticed that my code doesn't throw that error when I call item.Update() before my StartWorkflow function.
However it sometimes throws Save Conflict Your changes conflict with those made concurrently by another user when I tested creating my list items in a quick manner.
I soon realised that it is because ItemAdded receiver is by default running asynchronously.
Since I also use my custom save functionality on my list item, I moved my code to be part of it. After the attachment functionality (described in my previous post), I just call my workflow.
If you still want to use ItemAdded receiver you should be able to make it work as well. Just make it run as a synchronous event rather than asynchronous.
Hope this helps,
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