Selection Events

There are a couple of events relevant to the selection in RadGridView: SelectionChanging, SelectionChanged, CurrentCellChanged, SelectedCellsChanging and SelectedCellsChanged. The sequence of the events depends on the SelectionUnit property:

FullRow: The CurrentCellChanged is fired first and after that the SelectionChanged event fires.
Cell: The CurrentCellChanged is fired first and after that the SelectedCellsChanged event fires.

The events are fired by RadGridView each time there is a modification of the SelectedItems / SelectedCells collection, regardless of the way it happened (by user input or programmatically).

SelectionChanging event

It is fired once a selection is about to be performed and a change in the SelectedItems collection is to be executed (a row is to be selected or un-selected and SelectionUnit="FullRow").

Example 1: Subscribing to the SelectionChanging event

private void SelectionChanging(object sender, SelectionChangingEventArgs e) 
{ 
}

Private Sub SelectionChanging(sender As Object, e As SelectionChangingEventArgs) 
End Sub

SelectionChangingEventArgs exposes the following specific properties:AddedItems - a collection of the item(s) that has/have been added to the selection. RemovedItems - a collection of the item(s) that has/have been removed from the selection. IsCancelable - gets a value that indicates whether the event is cancelable. Cancel - a boolean property that enables canceling the selection.

SelectionChanged event

Fires each time there is a change in the SelectedItems collection (a row has been selected or un-selected and SelectionUnit="FullRow").

Example 2: Subscribing to the SelectionChanged event

private void SelectionChanged(object sender, SelectionChangeEventArgs e) 
{ 
}

Private Sub SelectionChanged(ByVal sender As Object, ByVal e As SelectionChangeEventArgs) 
End Sub

The SelectionChangeEventArgs class exposes the following specific properties:

AddedItems - a collection of the item(s) that has/have been added to the selection
RemovedItems - a collection of the item(s) that has/have been removed from the selection

CurrentCellChanged event

This event is raised when a cell is selected. It fires before the SelectionChanged (when SelectionUnit="FullRow") or before the SelectedCellsChanged (when SelectionUnit="Cell").

Example 3: Subscribing to the CurrentCellChanged event

private void CurrentCellChanged(object sender, GridViewCurrentCellChangedEventArgs e) 
{ 
}

Private Sub CurrentCellChanged(ByVal sender As Object, ByVal e As GridViewCurrentCellChangedEventArgs) 
End Sub

The GridViewCurrentCellChangedEventArgs class exposes the following specific properties:

NewCell - an instance of the newly selected cell
OldCell - an instance of the previously selected cell

SelectedCellsChanging event

This event is fired on the time a change in the SelectedCells collection is about to be performed (a cell is to be selected or un-selected when the SelectionUnit="Cell").

Example 4: Subscribing to the SelectedCellsChanging event

private void SelectedCellsChanging(object sender, GridViewSelectedCellsChangingEventArgs e) 
{ 
}

Private Sub SelectedCellsChanging(sender As Object, e As GridViewSelectedCellsChangingEventArgs) 
End Sub

The GridViewSelectedCellsChangingEventArgs class exposes the following specific properties:

AddedCells - a collection of the cell(s) that has/have been added to the selection
RemovedCells - a collection of the cell(s) that has/have been removed from the selection
IsCancelable - gets a value that indicates whether the event is cancelable
Cancel - a boolean property that enables canceling the cell selection

SelectedCellsChanged event

Fires each time there is change in the SelectedCells collection (a cell has been selected or un-selected when the SelectionUnit="Cell").

Example 5: Subscribing to the SelectedCellsChanged event

private void gridView_SelectedCellsChanged(object sender, GridViewSelectedCellsChangedEventArgs e) 
{ 
}

Private Sub gridView_SelectedCellsChanged(sender As Object, e As GridViewSelectedCellsChangedEventArgs) 
End Sub

The GridViewSelectedCellsChangedEventArgs class exposes the following specific properties:

AddedCells - a collection of the cell(s) that has/have been added to the selection
RemovedCells - a collection of the cell(s) that has/have been removed from the selection