The Selection behavior is emulated by the ASPxCheckBox. Client-side events are set at runtime. The checkbox uses the ASPxClientGridView.SelectRowOnPage to set a row, where it is placed.
This example shows ho to improve formatting, when it is necessary to place controls inside a command column in the appropriate layout.
See Also:
How to select a row in one click
How to hide ASPxGridView's SelectionCheckBox for particular row