InfoPath Dev

Sometimes bad news are better than none, so I appreciate your detailed and very helpful answer! I was hoping that there might be an automated string to XmlNode conversion in InfoPath and that I've only have to format the strings right. But you dashed my hope and I'll seek for a code behind solution (the InfoPath form is part of a compley ...

Yes, I'm using SharePoint 2010. I'm not experienced in OData services, but I've used Lists.asmx in Visual Studio but not without code in InfoPath. I hoped that I can omit the code-behind class and just use the InfoPath GUI, but it seems to be even more difficult than accessing Lists.asmx in a code-behind file!  When I try to ...

How to use the method GetListItems of the webservice http://sharepoint/_vti_bin/Lists.asmx in InfoPath 2010? What are the right values und format for the parameters of method GetListItems? I've tried a lot, but none worked. tns:listName My List Name, Guid, xml encode listname,... tns:viewName View Name, Guid, ...