esri maps – maptip

Hi,

I am writing an application which uses the esri maps in WPF. I am using the following blog by Greg for guidance

http://our.componentone.com/2012/08/14/having-fun-with-the-arcgis-api-for-silverlight/

I know this is for silverlight but I assumed it would serve as a decent basis.

All has gone well except for trying to set the text on the maptip. I have used the code in this article exactly and I still find that the text block is empty. Also, I find that the datacontext is null.

Has anyone done this in WPF, or can shed any light on it ?

Many thanks in advance,

Neil.