| -api-id | -api-type |
|---|---|
T:Windows.UI.Xaml.Controls.GridViewHeaderItem |
winrt class |
Represents items in the header for grouped data inside a GridView.
GridViewHeaderItem is a control that's created by the system and added to the visual tree when the data templates for a grouped ListView are realized. Specifically, it's created when realizing the GroupStyle.HeaderTemplate. You don't typically define elements for GridViewHeaderItem in XAML. There's a default template for GridViewHeaderItem as part of the built-in templates. The main app scenario for the GridViewHeaderItem class is to copy and replace the default style and template with a style of your own, which also implicitly targets GridViewHeaderItem.
There's a dedicated automation peer class for GridViewHeaderItem, GridViewHeaderItemAutomationPeer. This is because after the GridView is realized, all the created item parts need automation representation, so that Microsoft UI Automation can report them in the tree it provides for assistive technology and other Microsoft UI Automation clients.
If you use the GroupStyle.HeaderContainerStyle property, the Style it contains must have a TargetType value of either ListViewHeaderItem or GridViewHeaderItem.
You can modify the default Style and ControlTemplate to give the control a unique appearance. For information about modifying a control's style and template, see XAML styles. The default style, template, and resources that define the look of the control are included in the generic.xaml file. For design purposes, generic.xaml is available in the \(Program Files)\Windows Kits\10\DesignTime\CommonConfiguration\Neutral\UAP\<SDK version>\Generic folder from a Windows SDK installation. Styles and resources from different versions of the SDK might have different values.
XAML also includes resources that you can use to modify the colors of a control in different visual states without modifying the control template. Modifying these resources is preferred to setting properties such as Background and Foreground. For more info, see the Light-weight styling section of the XAML styles article. Light-weight styling resources are available starting in Windows 10, version 1607 (SDK 14393).
ListViewBaseHeaderItem, GridView, GroupStyle property, GroupStyle.HeaderTemplate