Code

Re: FormState["_memberVariable"] = Class

Jimmy — Wed, 22 Jul 2009 06:07:16 GMT

I'm not sure why it has to be inconvenient. You could do something like:

private XPathNavigator m_mRoot;
private XPathNavigator mRoot
{
     get
     {
          if(m_mRoot == null)
          {
               m_mRoot = // insert logic to produce mRoot
          }
          return m_mRoot;
     }
}

That will work if mRoot is always supposed to be pointing to the same spot. Will that work?

That should be easy enough to use.

Re: FormState["_memberVariable"] = Class

Scroll — Wed, 22 Jul 2009 04:04:32 GMT

Course, I can store XPathNavigator locally (So I did now), but it is inconvenient. I need for each function to create a new variable.

Re: FormState["_memberVariable"] = Class

Jimmy — Tue, 21 Jul 2009 14:00:58 GMT

I don't work with browser-enabled forms so I've never used the form state, but could you tell us why you want to store an XPathNavigator globally? I can't think of a whole lot of reasons why you would need to.

Re: FormState["_memberVariable"] = Class

Scroll — Tue, 21 Jul 2009 11:18:58 GMT

Hi!
I have code:
private XPathNavigator mRoot
{
get{return (XPathNavigator)FormState["mRoot"];}
set { FormState["mRoot"] = value; }
}

XPathNavigator is not serializable. How I can use this class in FormState? If I can't use it then how I can create global XPathNavigator variable in browser-enabled form?

Re: FormState["_memberVariable"] = Class

davidair — Wed, 21 Nov 2007 12:50:57 GMT

You can store any objects in FormState as long as they are serializable. To mark a class as serializable you can add the [System.SerializableAttribute()] to your class definition.

In your case this will not work because SPListItemCollection is already not serializable. One approach here would be to re-create it every time the business logic is called.

Re: FormState["_memberVariable"] = Class

Kun — Thu, 14 Dec 2006 16:15:42 GMT

quote:
are you writing this in codebehind an InfoPath form or is this a SharePoint web part? Can you give us some context here?

It's a codebehind file, "FormCode.cs", VSTA. Not a webpart! Does this help?

Re: FormState["_memberVariable"] = Class

Matt Faus — Thu, 14 Dec 2006 15:40:05 GMT

Hi Kun,

I'm confused by this code - are you writing this in codebehind an InfoPath form or is this a SharePoint web part? Can you give us some context here?

FormState["_memberVariable"] = Class

Kun — Wed, 13 Dec 2006 13:08:52 GMT

Is it just possible to store elementary data types in FormState[]? I want to do something like that:


private SPListItemCollection _memberVariable
        {
            get
            {
                return FormState["_memberVariable"] as SPListItemCollection;
            }
            set
            {
                FormState["_memberVariable"] = value;
            }
        }

and access it:


_memberVariable = list.GetItems(query);

Then I get the following exception:


System.Runtime.Serialization.SerializationException was unhandled by user code
  Message="Serialization error."
  Source="Microsoft.Office.InfoPath.Client.Internal.Host"
  StackTrace:
       at Microsoft.Office.InfoPath.Internal.FormStateBagHost.System.Collections.IDictionary.set_Item(Object key, Object value)
       at CommunicationSet.FormCode.set__memberVariable(SPListItemCollection value) in (...)
Microsoft.Office.InfoPath.Internal.ButtonEventHost.OnButtonClick(DocActionEvent pEvent)
       at Microsoft.Office.Interop.InfoPath.SemiTrust._ButtonEventSink_SinkHelper.OnClick(DocActionEvent pEvent)