How can I programatically set the rowheight of a row in my DataGrid

One way you can do this is to use reflection to access the DataGrid internal row objects which are not publicly exposed. This solution was suggested by Matthew Benedict in a private communication.

Here are both VB and C# sample projects showing how you might do this. The sample provides a class that you can instantiate by passing a DataGrid, creating a rowHeights object. Once you create this object, you can use an indexer on the object to set and get the rowheights.