publish at before publish event causes object reference not set to instance - API Questions

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Peter Gabriel 2 posts 22 karma points

Jan 25, 2011 @ 09:24

Publish at before publish event causes Object reference not set to instance ...

public class AppBase : umbraco.BusinessLogic.ApplicationBase {

    public AppBase() {
        Document.BeforePublish += new Document.PublishEventHandler(Document_BeforePublish);
    }

    void Document_BeforePublish(Document sender, PublishEventArgs e) {
    
       // This line causes the error on publish at
       Node myParent= new Node(sender.Parent.Id);
    }
}

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Jan Skovgaard 11280 posts 23678 karma points MVP 11x admin c-trib

Jan 25, 2011 @ 09:40

0

Hi Peter

What is it that you're exactly trying to achieve when the event occurs?

I guess you're probably missing a check or something. But if you could please ellaborate a bit more it would be easier to help you out.

/Jan

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Peter Gabriel 2 posts 22 karma points

Jan 25, 2011 @ 09:50
0
Hey,

I'm working on code from the Blog4Umbraco project, this specific code creates a year/month/day folder on the beforePublish event. This works perfectly on a normal publish, but gives an "object reference ..." error on a publish at.

The value of sender.Parent.Id is correct, so you would think retreiving the node would not be a problem.

Here you can find the code:

http://blog4umbraco.codeplex.com/SourceControl/changeset/view/61225#983069

This line causes the error:
```
Node topBlogLevel = new Node(sender.Parent.Id);
```
Grtz,

Peter
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Ben Tice 31 posts 131 karma points

Jun 06, 2011 @ 17:14
0
Hi Peter,

I've had the same issue. I've gotten around it by doing the date folder stuff AfterSave rather than BeforePublish (BlogDateFolder.cs).

So:
```
Document.BeforePublish += new Document.PublishEventHandler(Document_BeforePublish);
```
becomes:
```
Document.AfterSave += new Document.SaveEventHandler(Document_AfterSave)
```
and for the method:
```
void Document_AfterSave(Document sender, umbraco.cms.businesslogic.SaveEventArgs e)
```
Basically, the datefolders are then created when the document is initially saved. Then, the Publish At functionality works properly. Please note that the changeset I used was from Blog4Umbraco 2.0.26 with the datefolder patch (42029).

Ben
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