InfoPath Dev

I have a project where I want to loop through a group of data in my Main Datasource.  The structure of my data is:

 Main
    myFields
        lables
            label1
            label2
            label3
            label4

 What I want to do is write a looping function that looks at each of the children of labels and then do some stuff.  I've tried something like this:

 var oNode = null
var oNodes = XDocument.DOM.selectNodes("//my:myFields/my:labels")
while (oNode = oNodes.nextNode())
    { XDocument.UI.Alert(oNode.text); }

This shows me the TEXT of each oNode, but I want the NAME of the oNode. 

I've tried  XDocument.UI.Alert(oNode.nodeName); and it just returns my:labels. 

I've tried XDocument.UI.Alert(oNode.firstChild.nodeName); and it just returns #text

Any thoughts?

Try the following xpath instead:

/my:myFields/my:labels/*

Then you should be able to use nodeName

So, now I'm trying to use that information to refresh all the data in those nodes by values stored in another data set.  The complete code is:

function XDocument::OnLoad(eventObj)
{
   var objTranslation = XDocument.DataObjects("ThirdPartyEvent_Translations").DOM; objTranslation.setProperty("SelectionNamespaces",'xmlns:dfs="http://schemas.microsoft.com/office/infopath/2003/dataFormSolution" ' + ' xmlns:d="http://schemas.microsoft.com/office/infopath/2003/ado/dataFields"');
  var selectedLanguage = XDocument.DOM.selectSingleNode("/my:myFields/my:languageview").text; 
  var oNode = null
  var transtring = ""
  var oNodes = XDocument.DOM.selectNodes("//my:myFields/my:labels/*")
  while (oNode = oNodes.nextNode())
  {    transtring = objTranslation.selectSingleNode("//dfs:myFields/dfs:dataFields/dfs:ThirdPartyEvent_Translations/@Translation[../@stringID = 'user_sectionhead' and ../@languageid = '" + selectedLanguage + "']").text
       if (transtring != null)
          {XDocument.DOM.selectSingleNode("/my:myFields/my:labels/" + oNode.nodeName).text = transtring}
   }
}

The above code WORKS!  But, all the labels are painted with the corresponding text to the user_sectionhead stringid.

The problem I am running in to is that when I try to replace 'user_sectionhead' (one of the names of my nodes under labels) I get a Object required error.  Here is the syntax that IS NOT WORKING:

transtring = objTranslation.selectSingleNode("//dfs:myFields/dfs:dataFields/dfs:ThirdPartyEvent_Translations/@Translation[../@stringID = '" + oNode.nodeName + "'and ../@languageid = '" + selectedLanguage + "']").text

Could it be that oNode.nodeName is not "text" and needs to be converted to a string? 

Technically this code seems to make sense but maybe there is something else under labels which causes this to fail. I would recommend to step through your code in the debugger, looking at oNode at each iteration.

OK, I found the issue.  I named my stringIDs on my Sharepoint list things like 'user_username' and 'user_emailaddress'.  oNode.nodeName was returning 'my:user_username' etc.  I used the string.replace("my:","") function and all is well.  However, I was wondering.  Is there a way to "trap" the fact that the following doesn't exist?

 function transtring(sid,thislid)
   { var objTranslation = XDocument.DataObjects("ThirdPartyEvent_Translations").DOM;
     objTranslation.setProperty("SelectionNamespaces",'xmlns:dfs="http://schemas.microsoft.com/office/infopath/2003/dataFormSolution" ' + ' xmlns:d="http://schemas.microsoft.com/office/infopath/2003/ado/dataFields"');
     sid = sid.replace("my:","")
     var tstring = objTranslation.selectSingleNode("//dfs:myFields/dfs:dataFields/dfs:ThirdPartyEvent_Translations/@Translation[../@stringID = '"+sid+"' and ../@languageid = '"+thislid+"']").text; return tstring;
   }

I tried:

if (objTranslation.selectSingleNode("//dfs:myFields/dfs:dataFields/dfs:ThirdPartyEvent_Translations/@Translation[../@stringID = '"+sid+"' and ../@languageid = '"+thislid+"']").text == null) {}

 But that didn't work.  Got the same object error.

Well, selectSingleNode returns a node object if xpath matches or null otherwise. So if you do .text of something which is null, you will get an exception.

Instead, do something like that:

var someNode = something.selectSingleNode(someXPath)
if (someNode != null)
{
  // do something with someNode.text
}

Genius.  Here is all the code, and it works great.  I'll always have an English translation, but may be missing some other.  This way, at least the English will always be dispalyed.

//When loading the document, set all the labels to the default language id choice (english)
function XDocument::OnLoad(eventObj)
  { var langID = XDocument.DOM.selectSingleNode("/my:myFields/my:languageview").text;
    setTranslations(langID);
  }

//After a user changes the language dropdown, reset all the labels if possible to the language of choice
function msoxd_my_languageview::OnAfterChange(eventObj)
{ var langID = XDocument.DOM.selectSingleNode("/my:myFields/my:languageview").text;
  setTranslations(langID);
}

//Set all the language labels to the proper translation if possible.
function setTranslations(lid)
{
  var oNode = null;
  var oNodes = XDocument.DOM.selectNodes("//my:myFields/my:labels/*");
  while (oNode = oNodes.nextNode())
  { var theString = transtring(oNode.nodeName,lid);
    XDocument.DOM.selectSingleNode("/my:myFields/my:labels/"+oNode.nodeName).text = transtring(oNode.nodeName,lid);
  }
}

//Actually do the work of retrieving the translation.
//First, set the translation to N/A
//Then see if the currently selected language (languageview) has a translation
//If not, then see if there is an English equivelant
//If not, then just return the N/A
function transtring(sid,thislid)
{ var resultstring = "N/A"
  var objTranslation = XDocument.DataObjects("ThirdPartyEvent_Translations").DOM;
  objTranslation.setProperty("SelectionNamespaces",'xmlns:dfs="http://schemas.microsoft.com/office/infopath/2003/dataFormSolution" ' + ' xmlns:d="http://schemas.microsoft.com/office/infopath/2003/ado/dataFields"');
 
  //sid is passed in from a looping function that goes through all the labels node.  InfoPath sticks a "my:" on the front of each
  //of the nodes.  I didn't use "my:" in my naming convention in the Sharepoint list, so here we strip it out.
  sid = sid.replace("my:","") 

  var tstring = objTranslation.selectSingleNode("//dfs:myFields/dfs:dataFields/dfs:ThirdPartyEvent_Translations/@Translation[../@stringID = '"+sid+"' and ../@languageid = '"+thislid+"']");
  if (tstring == null)
  { tstring = objTranslation.selectSingleNode("//dfs:myFields/dfs:dataFields/dfs:ThirdPartyEvent_Translations/@Translation[../@stringID = '"+sid+"' and ../@languageid = 'en']") }
  if (tstring != null) { var resultstring = tstring.text }
  return resultstring;
}

Thanks for you help.