Browser Forms

Re: Clearing an attachment from an InfoPath form

Plee_agi — Tue, 11 Dec 2012 18:43:27 GMT

I tired your second code (which has the CreateAttribute line). This successfully cleared the attachment control -- and it does not leave me with a validation error.

Thanks for your help!

Re: Clearing an attachment from an InfoPath form

Plee_agi — Tue, 11 Dec 2012 18:30:47 GMT

No. The script that I posted does not cause validation error.

The error occurred when I copied the script from the 2nd link, which dateTime object as a parameter to SetValue.

Do I really need to CreateAttribute after DeleteSelf?

Re: Clearing an attachment from an InfoPath form

Jimmy — Tue, 11 Dec 2012 17:14:09 GMT

Well, that's still not really how it should be. Are you saying that this causes a validation error?

public void FormEvents_ViewSwitched(object sender, ViewSwitchedEventArgs e)
{

XPathNavigator root = MainDataSource.CreateNavigator();
XPathNavigator attachment = root.SelectSingleNode("//my:myFields/my:Attachment", NamespaceManager);


if (!attachment.MoveToAttribute("nil", attachment.LookupNamespace("xsi")))
{
if (attachment.MoveToFirstChild())
{
   attachment.DeleteSelf();
}
attachment.CreateAttribute("xsi", "nil",attachment.LookupNamespace("xsi"), "true");
}

}

Re: Clearing an attachment from an InfoPath form

Plee_agi — Tue, 11 Dec 2012 16:54:28 GMT

Yes I did try it -- copied the exact script which resulted in the validation error.

After further experimenting, this solution finally did the trick:

public void FormEvents_ViewSwitched(object sender, ViewSwitchedEventArgs e)
        {

            XPathNavigator root = MainDataSource.CreateNavigator();
            XPathNavigator attachment = root.SelectSingleNode("//my:myFields/my:Attachment", NamespaceManager);


            if (attachment.MoveToAttribute("nil", attachment.LookupNamespace("xsi")))
            {
                attachment.DeleteSelf();
            }
            attachment.SetValue("");

        }

Thanks for your insight!

Re: Clearing an attachment from an InfoPath form

Jimmy — Tue, 11 Dec 2012 16:15:37 GMT

I see. The instructions in that new link you've posted are for the opposite of what you're trying to do. Those instructions show how to remove a nil attribute and then set a field's value, but what you need to do is clear the field's value and add a nil attribute.

I believe that if you use the code modification I indicated in my last post, you should be all set. Did you try that?

Re: Clearing an attachment from an InfoPath form

Plee_agi — Tue, 11 Dec 2012 15:46:31 GMT

Thanks for your reply.

The reason that I am not using rules: the original posting did not offer such a solution. You either did it manually or use his script.

My project requirements are:

Create a form solution published to SharePoint.
Add a feature that allow users to upload documents to a document library on the same form. No switching pages for end users -- it should be seamless.
Clear the attachment to upload another next document. Having users to manual remove the exiting content is not acceptable. (YUP, I am programming something that SharePoint already does well, but in InfoPath)

I found this solution >> http://blogs.msdn.com/b/infopath/archive/2006/11/28/the-xsi-nil-attribute.aspx and tested the script.

This solution includes "node.DeleteSelf()" but require that I set a value to the node.
In the example it set a date value to the node. I guess he was trying to clear a date field. I do not know how to set a value to an attachment; nor understand why I should do so.
When I implemented the code, it **almost** works. After running the code, I get a validation error (red asterisk) on the attachment. This would not go away until I attach a new document.

Re: Clearing an attachment from an InfoPath form

Jimmy — Tue, 11 Dec 2012 08:54:30 GMT

In browser forms, even if you use attachment.SetValue(""); to clear a field, it will be treated as non-empty when you try to add the nil attribute. Instead of that line, you can use this, which will work in both the filler and the browser:

                if (attachment.MoveToFirstChild())
                {
                    attachment.DeleteSelf();
                }

But is there a reason you're using code to clear out attachments? This can be done with rules just fine.

Clearing an attachment from an InfoPath form

Plee_agi — Wed, 05 Dec 2012 22:58:51 GMT

I am writing a code that would programatically remove any content from an Attachment control. There is a nice article about this from bizsupportonline >>

http://www.bizsupportonline.net/blog/2009/10/delete-remove-clear-attachment-infopath-form/

a. I created an InfoPath 2010 form, with an Attachment control. I applied this code to the form's Loading Event. I published to SharePoint 2010; and set the form library to 'Open in Browser'

b. I then added a document and attached a file to the document.

This solution works, but only when I reopen using "Edit Microsoft InfoPath"

When open the form using a browser (Windows 7 Enterprise SP1), I would get a warning message with a correlation id. The trace log gave me this message:

"Business logic failed due to an exception. (User: , Form Name: AttachmentDemo, IP: , Request: , Form ID: urn:schemas-microsoft-com:office:infopath:AttachmentDemo:-myXSD-2012-12-05T20-59-41, Type: SchemaValidationException, Exception Message: Schema validation found non-datatype errors.)"

Is ther something that I should do differently to clear an attachment control in browser mode?