DxAccordion.BeforeExpand Event
Fires when an item is about to be expanded and allows you to cancel the action.
Namespace: DevExpress.Blazor
Assembly: DevExpress.Blazor.v24.2.dll
NuGet Package: DevExpress.Blazor
#Declaration
[Parameter]
public Action<AccordionItemCancelEventArgs> BeforeExpand { get; set; }
#Event Data
The BeforeExpand event's data class is AccordionItemCancelEventArgs. The following properties provide information specific to this event:
Property | Description |
---|---|
Cancel | Specifies whether the action that raised the event should be canceled. |
Caused |
Obsolete. Specifies whether an event was triggered by user action or from code.
Inherited from Accordion |
Item |
Returns information about an item related to the event.
Inherited from Accordion |
Reason |
Returns the reason why the Accordion item’s expansion state changed.
Inherited from Accordion |
#Remarks
The following code snippet cancels the expand action for root-level nodes:
<DxAccordion BeforeExpand="@BeforeExpand">
@* ... *@
</DxAccordion>
@code {
void BeforeExpand(AccordionItemCancelEventArgs e) {
if (args.ItemInfo.Level == 0) args.Cancel = true;
}
}