PropertyGridControl.CustomExpand Event
Enables you to control how properties and categories expand.
Namespace: DevExpress.Xpf.PropertyGrid
Assembly: DevExpress.Xpf.PropertyGrid.v18.2.dll
Declaration
Event Data
The CustomExpand event's data class is CustomExpandEventArgs. The following properties provide information specific to this event:
Property | Description |
---|---|
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. |
IsExpanded | Gets or sets whether the item is expanded. |
IsInitializing | Gets whether the item is being initialized. |
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 information about an expanding row. |
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. |
Remarks
Handle the CustomExpand event to expand a row (or category). This event fires for each PropertyGridControl item. Set the event arguments’ CustomExpandEventArgs.IsExpanded property to true to expand a processed item.
When the CustomExpandEventArgs.IsExpanded property is set to true, end-users cannot collapse items in the PropertyGridControl. Set the IsExpanded property to true only if the processed item is initializing (CustomExpandEventArgs.IsInitializing is true) to allow end-users to collapse the control items.
The code sample below demonstrates how to expand all the items within the control and allow end-users to collapse them:
void PropertyGridControl_CustomExpand(object sender, CustomExpandEventArgs args) {
if(args.IsInitializing)
args.IsExpanded = true;
}
Related GitHub Examples
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the CustomExpand event.
Note
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