In the page that I am describing, the XamWebMap is in the center column of a 3-column grid.  The widths of the grid are not fixed; they automatically adjust to display data that corresponds to the selected MapElement.  If the data is especially wide, the map's width is forced to shrink .

I addressed the problem by giving the columns an explicit width so that the map's width does not change.  I don't know if it's a "bug" or not, but it's something worth noting.

eschmuck said:

But if I click on an element that is on the edge of the viewable window of the map, the map will jump to the clicked element;

do you have code hooked up which pans the map when a click occurs?  or is this the default behavior you're describing, with no application code involved other than changing brushes?

I don't know if it's helpful, but I've found that with the suggested solution that when the map re-centers or changes zoom, the behavior of the elements is still buggy.  For example, if I click back-and-forth between two elements that are nearly side-by-size and the map does not change, the elements' fill is correct.  But if I click on an element that is on the edge of the viewable window of the map, the map will jump to the clicked element; the fill color of the elements looks right, but if I mouseover the previous element, it will revert the fill to the prior color.

I'm not having any luck with the suggested solution.  I'm still seeing the fill revert to the previous color (green).  I can successfully change the border, so that's what I'm going to use for now.

e.Element.Fill =

;

e.Element.Fill =

.Red);

.SelectedElement = e.Element;

e.Element.Stroke =

.Black);