title: How to dynamically fill controls on a selection changed in a aspxgridview
body: <p>I have a AspxGridView which is linked to a DataSource. Below the GridView there are some textBoxes which should be populated on a selection changed event. How can I achieve that? Maybe with a callback panel and the clientSide SelectionChanged to fires a custom callback or ... ? Or maybe the SelectionChange isn't the appropriate event? I can see that in the gridview there are Begin and EndCallback on the client sides but when are they actually executed?</p>