Gets whether the current cell's value should be saved in a data source.
true if the current cell's value needs to be saved in a data source.
If the IsSetData property is set to true (and consequently the GridColumnDataEventArgs.IsGetData property is set to false) the GridColumnDataEventArgs.Value parameter identifies the value which has been set for the current cell in the grid. This value should be saved in your data source by the event handler.
If the IsSetData property returns false (and consequently the GridColumnDataEventArgs.IsSetData property is set to true) the data for the currently processed cell should be supplied via the event handler. To do this, assign a required value (for example, it can be calculated based on values of other columns in the current row) to the event's GridColumnDataEventArgs.Value parameter.