Gets a Boolean value which indicates whether you should provide data for the currently processed cell.
true if you need to provide data for the currently processed cell, false otherwise.
If the IsGetData property returns true (and consequently the CustomColumnDataEventArgs.IsSetData property is set to false) the data for the cell currently being processed should be supplied via the event handler. To do this get a value from your data source based upon the current row and unbound column and assign it to the event's CustomColumnDataEventArgs.Value parameter. The current unbound column is identified by the CustomColumnDataEventArgs.Column property. The CustomColumnDataEventArgs.ListSourceRowIndex property can be used to identify the currently processed row.
If the IsGetData property is set to false (and consequently the CustomColumnDataEventArgs.IsSetData property is set to true) the CustomColumnDataEventArgs.Value parameter identifies the value which has been set for the current cell from the grid. This should be stored to your data source by the event handler.