GridViewBase.CellValueChanging Event

Fires in response to changing the edit value.

Namespace: DevExpress.Xpf.Grid

Assembly: DevExpress.Xpf.Grid.v20.2.dll

Declaration

public event CellValueChangedEventHandler CellValueChanging
Public Event CellValueChanging As CellValueChangedEventHandler

Event Data

The CellValueChanging event's data class is CellValueChangedEventArgs. The following properties provide information specific to this event:

Property Description
Cell Gets or sets the CellValue object consisting of information about the cell being processed. Inherited from CellValueEventArgs.
Column Gets a column that contains the edited cell. Inherited from CellValueEventArgs.
Handled Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs.
OldValue Gets the cell's previous value.
OriginalSource Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs.
RoutedEvent Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs.
Row Gets the processed row. Inherited from RowEventArgs.
RowHandle Gets the processed row's handle. Inherited from RowEventArgs.
Source Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs.
Value Gets or sets the processed cell's value. Inherited from CellValueEventArgs.

The event data class exposes the following methods:

Method Description
InvokeEventHandler(Delegate, Object) When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation. Inherited from RoutedEventArgs.
OnSetSource(Object) When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes. Inherited from RoutedEventArgs.

Remarks

The CellValueChanging event is raised each time the edited value is being changed (an end-user types or deletes a character, chooses a value from the dropdown list, etc.). The event provides a parameter whose properties can be used to identify the row and column containing the edited cell and its current value.

The CellValueChanging event doesn't fire when changing cell values in code. Handle this event if you need to provide an immediate response to end-user actions. For instance, you may close the editor and focus the next cell when the edit value's length exceeds the predefined value.

To learn more, see Obtain and Set Cell Values.

See Also