InfoPath Dev

I have a text field with a Data type of Whole Number (integer) the value of which I need to set in code (C# on InfoPath 2007)

XPathNavigator txtField = this.CreateNavigator().SelectSingleNode("/my:myFields/my:txtField", this.NamespaceManager);         
           txtField.SetValue(10);
Unfortunately the setValue method only takes a string parameter.

txtField.SetValue("10");

gives the runtime error 'Schema bvalidation found non-data type errors.' The detail says 'System.InvalidOperationException'

You need to remove the Nil attribute:

}

DeleteNil(this.CreateNavigator().SelectSingleNode("/my:myFields/my:txtField", this.NamespaceManager));

XPathNavigator txtField = this.CreateNavigator().SelectSingleNode("/my:myFields/my:txtField", this.NamespaceManager);         
           txtField.SetValue(10);
txtField.SetValue("10");

http://blogs.msdn.com/infopath/archive/2006/11/28/the-xsi-nil-attribute.aspx

 Thanks Koen that fixed the problem even if I'm not so impressed by them putting the entire method on one line.

        public void deleteNil(XPathNavigator node)
        {
            if (node.MoveToAttribute("nil", "http://www.w3.org/2001/XMLSchema-instance"))
            {
                node.DeleteSelf();
            }
            else { }
        }