DataGrid.ColumnReordered Event
Occurs when a DataGrid column has moved to a new position in the display order.
Namespace: System.Windows.Controls
Assembly: System.Windows.Controls.Data (in System.Windows.Controls.Data.dll)
The ColumnReordered event occurs whenever a column DisplayIndex property value changes either programmatically or because of a user drag-and-drop operation. Users can change the column order by dragging column headers only if the CanUserReorderColumns property is true.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.