blazor-devexpress-dot-blazor-dot-selectionchangedeventargs.md
Identifies an action that causes selection change.
Namespace : DevExpress.Blazor
Assembly : DevExpress.Blazor.v25.2.dll
NuGet Package : DevExpress.Blazor
public SelectionChangeSource ChangeSource { get; }
| Type | Description |
|---|---|
| SelectionChangeSource |
An enumeration value.
|
Available values:
| Name | Description |
|---|---|
| UserAction |
Selection changes when a user selects items using mouse/keyboard, or clicks the built-in Select All checkbox (only for ListBox with multiple selection).
| | ParameterChange |
Selection changes when Blazor updates the component’s Value or Values parameter. This happens when you define parameters in component markup or update them using BeginUpdate() and EndUpdate() methods.
| | ApiCall |
For ListBox with multiple selection only: Selection changes when the SelectAllAsync or DeselectAllAsync method is called.
|
Handle the DxComboBox.SelectedDataItemChanged, DxListBox.SelectedDataItemsChanged, or DxTagBox.SelectedDataItemsChanged event to respond to item selection changes. Use the ChangeSource argument property to identify the action that caused the selection change.
ComboBox/TagBox items can be selected/deselected in two ways: UserAction, ParameterChange. ListBox item selection can be changed in three ways: UserAction, ParameterChange, ApiCall.
Refer to DxComboBox.SelectedDataItemChanged, DxListBox.SelectedDataItemsChanged, and DxTagBox.SelectedDataItemsChanged event descriptions for examples.
See Also
SelectionChangedEventArgs Class