问题
We are using an infopath form that when submitted is supposed to fire off a custom .NET workflow. Basically, the information within the form is used to create a new sharepoint site. What I am seeing happen is that the first time the workflow runs (which is automatic after the form is submitted), the workflow errors out. When I run the workflow manually immediately after it fails, the workflow runs fine.
this.workflowProperties.Item["Client Name"]
I've debugged the issue down to the above line where workflowProperties is of type Microsoft.SharePoint.Workflow.SPWorkflowActivationProperties. The first time the workflow runs, the property listed above (and all others) are null. The second time it is run the client name property is as it should be (populated from the infopath form).
Another important piece of information is that this workflow was working fine for over a year and suddenly started not working correctly a few weeks ago for no particular reason. We were having some permissions issues the past month but I cannot see how that could be related to the workflow issue. The user I am logged in as is a site collection administrator. I use the same user to kick the workflow off manually (which succeeds). I do not think that the workflow runs as the user that is logged in though (when it is run automatically on form submission).
Another interesting wrinkle to the whole situation: there are a total of 3 custom workflows that the application uses. 2 were made in visual studio - one of these works fine and other is displaying the behavior described above. The last was made in sharepoint designer and is failing.
I'm willing to try just about anything at this point. I am on a dev server (which displays the exact symptoms as production) so I can try just about anything.
回答1:
I'm guessing this has to do with the workflow being fired asynchronously from the commit operation that sets the fields values. Can you try and fetch the item explictly from the list instead of using the Item from the workflow properties. something like the following:
SPListItem l_item =
workflowProperties.Item.List.Items.GetItemById(
workflowProperties.Item.Id
);
i'm not certain, but it may be worth a try.
The other thing to keep in mind is the SPContext.Current object will be null if being called from an EventReceiver, but will be valid if called manually. It doesn't sound like this is the issue, but its something to be aware of nonetheless.
回答2:
If the InfoPath forms are submitted from a Vista or Win 7 machine, you might face this issue of getting a NULL value for the fields in the InfoPath form. Try adding a delay activity with around 10seconds and see if your are able to get the value of the fields from InfoPath.
Refer to this link for more details: Why does my SharePoint workflow fail when the client is running Vista or Windows 7?
回答3:
Try looking in your SharePoint Logs.
They are located under the 12-Hive in the LOGS folder - open up the latest and look for something with 'Workflow infrastructure' in it, maybe that can point you in the right direction.
回答4:
The "solution" was to do an export and transfer to a new server. Basically just use STSADM to do the export operation and then import the same file on the new server.
SEE:
http://sharepointdogs.wordpress.com/2008/07/30/content-migration-or-backuprestore-in-moss-2007/
I was on the phone with Microsoft Support for hours on this issue - transferring to a new server would be my recommendation for anyone else that might encounter this problem.
来源：https://stackoverflow.com/questions/610790/sharepoint-workflow-fails-when-first-run-but-succeeds-when-run-manually