SharePoint Workflow: how to update the item without triggering the workflow again
Solution 1
You could use some extension method to update item silently.
public static class SPListItemExtensions
{
/// <summary>
/// Provides ability to update list item without firing event receiver.
/// </summary>
/// <param name="item"></param>
/// <param name="doNotFireEvents">Disables firing event receiver while updating item.</param>
public static void Update(this SPListItem item, bool doNotFireEvents)
{
SPItemEventReceiverHandling rh = new SPItemEventReceiverHandling();
if (doNotFireEvents)
{
try
{
rh.DisableEventFiring();
item.Update();
}
finally
{
rh.EnableEventFiring();
}
}
else
{
item.Update();
}
}
/// <summary>
/// Provides ability to update list item without firing event receiver.
/// </summary>
/// <param name="item"></param>
/// <param name="incrementListItemVersion"></param>
/// <param name="doNotFireEvents">Disables firing event receiver while updating item.</param>
public static void SystemUpdate(this SPListItem item, bool incrementListItemVersion, bool doNotFireEvents)
{
SPItemEventReceiverHandling rh = new SPItemEventReceiverHandling();
if (doNotFireEvents)
{
try
{
rh.DisableEventFiring();
item.SystemUpdate(incrementListItemVersion);
}
finally
{
rh.EnableEventFiring();
}
}
else
{
item.SystemUpdate(incrementListItemVersion);
}
}
/// <summary>
/// Provides ability to update list item without firing event receiver.
/// </summary>
/// <param name="item"></param>
/// <param name="doNotFireEvents">Disables firing event receiver while updating item.</param>
public static void SystemUpdate(this SPListItem item, bool doNotFireEvents)
{
SPItemEventReceiverHandling rh = new SPItemEventReceiverHandling();
if (doNotFireEvents)
{
try
{
rh.DisableEventFiring();
item.SystemUpdate();
}
finally
{
rh.EnableEventFiring();
}
}
else
{
item.SystemUpdate();
}
}
private class SPItemEventReceiverHandling : SPItemEventReceiver
{
public SPItemEventReceiverHandling() { }
new public void DisableEventFiring()
{
base.DisableEventFiring();
}
new public void EnableEventFiring()
{
base.EnableEventFiring();
}
}
}
Solution 2
Some more links because the above solution is not working for 2010:
- MSDN SPEventReceiverBase.EventFiringEnabled Property
- How DisableEventFiring / EventFiringEnabled works
The best solution:
Solution 3
It seems Microsoft have reworked this in SharePoint 2010, the EventFiringEnabled and EventFiringDisabled have been made obsolete.
Instead use a boolean Property named EventFiringEnabled.
Philipp Schmid
Updated on July 13, 2020Comments
-
Philipp Schmid almost 4 years
I have a SharePoint workflow which is running whenever the item changes. The workflow communicates with an external REST service. If the service returns a string, I want to update one of the field values with that string. Unfortunately, this update will trigger another instance of the workflow for this item once the current workflow terminates. I end up with an infinite loop!
How I can prevent this from happening? SPListItem has Update(), UpdateOverwriteVersion(), and SystemUpdate() methods but none of them seem to prevent subsequent workflows from being triggered.
I could inspect the last modified timestamp of the item and terminate the workflow if the last update happened within a certain timespan, but I am looking for a more robust solution.