AccordionControl.CustomItemFilter Event

Occurs when the AccordionControl is about to be filtered.

Namespace: DevExpress.Xpf.Accordion

Assembly: DevExpress.Xpf.Accordion.v23.2.dll

NuGet Package: DevExpress.Wpf.Accordion

Declaration

C#

public event EventHandler<AccordionCustomItemFilterEventArgs> CustomItemFilter

VB.NET

Public Event CustomItemFilter As EventHandler(Of AccordionCustomItemFilterEventArgs)

Event Data

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

Property	Description
Accepted	Gets or sets a value indicating whether the currently processed item is included in the results.
Accordion	Gets the AccordionControl whose items are being filtered.
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.
Item	Gets the currently processed Accordion item.
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.
SearchText	Gets the search criteria.
Source	Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs.

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.
PassesFilter(String)	Checks whether the specified string meets filter criteria.

Remarks

You can handle the CustomItemFilter event to customize the AccordionControl‘s filtering logic.

The following code sample shows how to exclude an accordion item from the search result:

XAML

<dxa:AccordionControl ShowSearchControl="True" CustomItemFilter="OnCustomItemFilter">
   <dxa:AccordionItem Header="Item1" Glyph="{dx:DXImage Image=Image_32x32.png}"/>
   <dxa:AccordionItem Header="Item2" Glyph="{dx:DXImage Image=Map_32x32.png}"/>
   <dxa:AccordionItem Header="Item3" Glyph="{dx:DXImage Image=Image_32x32.png}"/>
</dxa:AccordionControl>

C#

void OnCustomItemFilter(object sender, AccordionCustomItemFilterEventArgs e) {
   if(((AccordionItem)e.Item).Header.ToString() == "Item1") {
      e.Accepted = false;
   }
}

The image below shows the result:

Refer to the Searching topic to learn more.