Image Class

Reference

Definition

Namespace:: Microsoft.UI.Xaml.Controls

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Edit

Represents a control that displays an image. The image source is specified by referring to an image file, using several supported formats. The image source can also be set with a stream. See Remarks for the list of supported image source formats.

public ref class Image sealed : FrameworkElement

/// [Windows.Foundation.Metadata.Activatable(65536, "Microsoft.UI.Xaml.WinUIContract")]
/// [Windows.Foundation.Metadata.ContractVersion(Microsoft.UI.Xaml.WinUIContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class Image final : FrameworkElement

[Windows.Foundation.Metadata.Activatable(65536, "Microsoft.UI.Xaml.WinUIContract")]
[Windows.Foundation.Metadata.ContractVersion(typeof(Microsoft.UI.Xaml.WinUIContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class Image : FrameworkElement

Public NotInheritable Class Image
Inherits FrameworkElement

<Image .../>

Inheritance: Object Platform::Object IInspectable DependencyObject UIElement FrameworkElement Image

Attributes: ActivatableAttribute ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Examples

Tip

For more info, design guidance, and code examples, see Images and image brushes.

Open the WinUI 3 Gallery app and see the Image in action.

The WinUI 3 Gallery app includes interactive examples of most WinUI 3 controls, features, and functionality. Get the app from the Microsoft Store or get the source code on GitHub.

Remarks

Image file formats

An Image can display these image file formats:

Joint Photographic Experts Group (JPEG)
Portable Network Graphics (PNG)
bitmap (BMP)
Graphics Interchange Format (GIF)
Tagged Image File Format (TIFF)
JPEG XR
icons (ICO)
Scalable Vector Graphics (SVG)

The Image element supports animated Graphics Interchange Format (GIF) images. When you use a BitmapImage as the image Source, you can access BitmapImage APIs to control playback of the animated Graphics Interchange Format (GIF) image. For more info, see the Remarks on the BitmapImage class page.

The Image element supports static Scalable Vector Graphics (SVG) images through SvgImageSource. SvgImageSource supports secure static mode from the SVG specification and does not support animations or interactions. Direct2D supplies the underlying SVG rendering support and for more info on specific SVG element and attribute support, see SVG Support. To learn more about how to insert a SVG in your app, visit the SvgImageSource class page.

Setting Image.Source

To set the image source file that an Image displays, you set its Source property, either in XAML or in code. Here's a simple example of setting Source in XAML:

<Image Width="200" Source="Images/myimage.png"/>

This usage is setting Source by Uniform Resource Identifier (URI), which is a shortcut that's enabled by XAML. Note that the Uniform Resource Identifier (URI) here appears to be a relative Uniform Resource Identifier (URI); supporting partial Uniform Resource Identifier (URI) is another XAML shortcut. The root of this Uniform Resource Identifier (URI) is the base folder for an app project. This is usually the same location that the XAML file containing the Image tag is loaded from. In this example, the image source file is in an Images subfolder within the app's file structure.

Setting the Source property is inherently an asynchronous action. Because it's a property, there isn't an awaitable syntax, but for most scenarios you don't need to interact with the asynchronous aspects of image loading. The framework will wait for the image source to be returned, and will start a layout cycle when the image source file is available and decoded.

Setting the source to a Uniform Resource Identifier (URI) value that can't be resolved to a valid image source file doesn't throw an exception. Instead, it fires an ImageFailed event. You can write an ImageFailed handler and attach it to the Image object, and possibly use the ErrorMessage in event data to determine the nature of the failure. An error in decoding can also fire ImageFailed. If you want to verify that an image source file was loaded correctly, you can handle the ImageOpened event on the Image element.

You typically use image source files that you have included as part of your app download package. For large files, there might be a very small delay while the image source file is decoded, if this is the first time the source is used. For more info on app resources and how to package image source files in an app package, see Defining app resources.

You can also use image source files that aren't part of the app, for example images from external servers. These images are downloaded by an internal HTTP request, and then decoded. If the image source file is a large file, or if there are connection issues, there might be a delay before an external image can be displayed in an Image element.

Setting Image.Source using code

If you create an Image object using code, call the default constructor, then set the Image.Source property. Setting the Image.Source property requires an instance of the BitmapImage class, which you also must construct. If your image source is a file referenced by Uniform Resource Identifier (URI), use the BitmapImage constructor that takes a Uniform Resource Identifier (URI) parameter. When you reference local content, you must include the ms-appx: scheme in the absolute Uniform Resource Identifier (URI) that you use as the BitmapImage constructor parameter. In code, you don't get the processing shortcuts for combining relative Uniform Resource Identifier (URI) parts and the ms-appx: scheme that happens automatically if you specify Source as a XAML attribute. Instead you must explicitly construct an absolute Uniform Resource Identifier (URI) with the appropriate scheme. You typically use the ms-appx: scheme for an image file that's packaged as part of your app.

Tip

If you're using C#, you can get the BaseUri property of the Image, and pass that as the baseUri parameter for System.Uri constructors that combine a Uniform Resource Identifier (URI) base location and a relative path within that location.

Here's an example of setting Image.Source in C#. In this example, the Image object was created in XAML but doesn't have a source or any other property values; instead these values are provided at run-time when the Image is loaded from XAML.

void Image_Loaded(object sender, RoutedEventArgs e)
{
    Image img = sender as Image; 
    BitmapImage bitmapImage = new BitmapImage();
    img.Width = bitmapImage.DecodePixelWidth = 80; //natural px width of image source
    // don't need to set Height, system maintains aspect ratio, and calculates the other
    // dimension, so long as one dimension measurement is provided
    bitmapImage.UriSource = new Uri(img.BaseUri,"Assets/StoreLogo.png");
    img.Source = bitmapImage;
}

Using a stream source for an Image source

If your image source is a stream, you must write code that sets your Image instance to use the stream. This can't be done in XAML alone. Construct the Image to use, or reference an existing Image instance (which might have been defined in XAML markup, but without a source). Then use the async SetSourceAsync method of BitmapImage to define the image information from a stream, passing the stream to use as the streamSource parameter. Using a stream for an image source is fairly common. For example, if your app enables a user to choose an image file using a FileOpenPicker control, the object you get that represents the file the user chose can be opened as a stream, but doesn't provide a Uniform Resource Identifier (URI) reference to the file.

In this example, the code is already awaitable because it's waiting for the user to choose a file and it only runs after that happens. The stream to use comes from StorageFile.OpenAsync after a StorageFile instance is returned from the async picker actions.

FileOpenPicker open = new FileOpenPicker(); 
// Open a stream for the selected file 
StorageFile file = await open.PickSingleFileAsync(); 
// Ensure a file was selected 
if (file != null) 
{ 
    using (IRandomAccessStream fileStream = await file.OpenAsync(Windows.Storage.FileAccessMode.Read)) 
    { 
        // Set the image source to the selected bitmap 
         BitmapImage bitmapImage = new BitmapImage(); 
         bitmapImage.DecodePixelWidth = 600; //match the target Image.Width, not shown
         await bitmapImage.SetSourceAsync(fileStream); 
         Scenario2Image.Source = bitmapImage; 
    } 
}

Tip

If you're using C# or Microsoft Visual Basic, streams can use the System.IO.Stream type that you may be familiar with from previous Microsoft .NET programming experience. You can call the AsStream extension method as an instance method on any object of type IRandomAccessStream that you've obtained from a Windows Runtime API. The previous example used IRandomAccessStream for parameter passing and didn't need to use AsStream. But if you ever need to manipulate the stream, AsStream is there as a utility to convert to a System.IO.Stream if you need it.

See XAML images sample for more example code.

Image files and performance

Large image files can impact performance because they load into memory. If you are referencing an image file where you know that the source file is a large, high resolution image, but your app is displaying it in a UI region that's smaller than the image's natural size, you should set the DecodePixelWidth property, or DecodePixelHeight. The DecodePixel* properties enable you to pass information directly to the format-specific codec, and the codec can use this information to decode more efficiently and to a smaller memory footprint. Set DecodePixelWidth to the same pixel width of the area that you want your app to actually display. In other words, DecodePixelWidth for the BitmapImage source should be the same value as the Width or ActualWidth of the Image control that displays that source.

You can either set DecodePixelWidth, or set DecodePixelHeight. If you set one of these two properties, the system calculates the matching property to maintain the correct aspect ratio. You can also set both properties, but you typically should use values that maintain that aspect ratio. If you want to change aspect ratios there are better ways to do so, for example using a TranslateTransform as a RenderTransform.

To set DecodePixelWidth (or DecodePixelHeight) in XAML, you must use a slightly more verbose XAML syntax that includes an explicit BitmapImage element as a property element value, like this:

<Image>
  <Image.Source>
    <BitmapImage DecodePixelWidth="200" UriSource="images/myimage.png"/>
  </Image.Source>
</Image>

DecodePixelWidth (or DecodePixelHeight) are properties of BitmapImage, so you need an explicit BitmapImage XAML object element in order to set the DecodePixel* properties as attributes in XAML.

If you are creating an Image instance in code, you are probably already creating a BitmapImage instance as a value to provide for the Source property, so just set DecodePixelWidth (or DecodePixelHeight) on the BitmapImage instance before you set the UriSource property. The DecodePixelType property also affects how pixel values are interpreted by the decode operations.

To prevent images from being decoded more than once, assign image source property from Uniform Resource Identifier (URI) rather than using memory streams whenever you can. The XAML framework can associate the same Uniform Resource Identifier (URI) in multiple places with one decoded image, but it cannot do the same for multiple memory streams even if they contain the same data.

You can remove image files from the image cache by setting all associated Image.Source values to null.

For more info on the Image class and performance, see Optimize animations and media.

Image file encoding and decoding

The underlying codec support for image files is supplied by Windows Imaging Component (WIC) API. For more info on specific image formats as documented for the codecs, see Native WIC Codecs.

The API for Image, BitmapImage and BitmapSource doesn't include any dedicated methods for encoding and decoding of media formats. All of the decoding operations are built-in as actions that happen when the source is set or reset. This makes the classes easier to use for constructing UI, because they have a default set of supported source file formats and decoding behavior. Classes such as BitmapImage expose some of the decoding options and logic as part of event data for ImageOpened or ImageFailed events. If you need advanced image file decoding, or image encoding, you should use the API from the Windows.Graphics.Imaging namespace. You might need these API if your app scenario involves image file format conversions, or manipulation of an image where the user can save the result as a file. The encoding API are also supported by the Windows Imaging Component (WIC) component of Windows.

Image width and height

The Image class inherits the Width and Height properties from FrameworkElement, and these properties potentially control the size that your Image control will render when it displays in UI. If you don't set a Width or a Height, then the width and height is determined by the natural size of the image source. For example, if you load a bitmap image that is 300 pixels high and 400 pixels wide, as recorded in its source file format, these measurements are used for the width and height when the Image control calculates its natural size. You can check ActualHeight and ActualWidth at run time after the image renders to get the measurement information. Or, you can handle ImageOpened and check image file properties such as PixelHeight and PixelWidth immediately before the image renders.

If you set just one of the Width or Height properties but not both, then the system can use that dimension as guidance and calculate the other one, preserving the aspect ratio. If you're not sure of the source file dimensions, pick the dimension that's the most important to control in your layout scenario and let the system calculate the other dimension, and then the layout behavior of the container will typically adapt the layout to fit.

If you don't set Width and/or Height, and leave the image as its natural size, the Stretch property for the image can control how the image source file will fill the space you specify as Width and Height. The default Stretch value is Uniform, which preserves aspect ratio when it fits the image into a layout container. If the container's dimensions don't have the same aspect ratio, then there will be empty space that's still part of Image but isn't showing any image pixels, at least while using the Uniform value for Stretch. UniformToFill for Stretch won't leave empty space but might clip the image if dimensions are different. Fill for Stretch won't leave empty space, but might change the aspect ratio. You can experiment with these values to see what's best for image display in your layout scenario. Also, be aware that certain layout containers might size an image that has no specific Width and Height to fill the entire layout space, in which case you can choose to set specific sizes on either the image or the container for it.

NineGrid

Using the NineGrid technique is another option for sizing images that have a different natural size than your display area, if the image has regions that should not be scaled uniformly. For example you can use a background image that has an inherent border that should only stretch in one dimension, and corners that shouldn't stretch at all, but the image center can stretch to fit the layout requirements in both dimensions. For more info, see NineGrid.

Resource qualification and localization for Image

Image source files and scaling

You should create your image sources at several recommended sizes, to ensure that your app looks great when Windows scales it. When specifying a Source for an Image, you can use a naming convention for resources that will use the correct resource for device-specific scaling factors. This is determined by the app automatically at run-time. For specifics of the naming conventions to use and more info, see Quickstart: Using file or image resources.

For more info on how to design images properly for scaling, see UX guidelines for layout and scaling.

Using unqualified resources

Unqualified resources is a technique you can use where the basic resource reference refers to a default resource, and the resource management process can find the equivalent localized resource automatically. You can use automatic handling for accessing unqualified resources with current scale and culture qualifiers, or you can use ResourceManager and ResourceMap with qualifiers for culture and scale to obtain the resources directly. For more info see Resource management system.

FlowDirection for Image

If you set FlowDirection as RightToLeft for an Image, the visual content of an Image is flipped horizontally. However, an Image element does not inherit the FlowDirection value from any parent element. Typically you only want image-flipping behavior in images that are relevant to layout, but not necessarily to elements that have embedded text or other components that wouldn't make sense flipped for a right-to-left audience. To get image-flip behavior, you must set the FlowDirection element on the Image element specifically to RightToLeft, or set the FlowDirection property in code-behind. Consider identifying the Image element by x:Uid directive, and specifying FlowDirection values as a Windows Runtime resource, so that your localization experts can change this value later without changing the XAML or code.

The Image class and accessibility

The Image class is not a true control class in that it is not a descendant class of Control. You can't call focus to an Image element, or place an Image element in a tab sequence. For more info on the accessibility aspects of using images and the Image element in your UI, see Basic accessibility information.

Image resources

Resources can use a resource qualifier pattern to load different resources depending on device-specific scaling. Any resource that was originally retrieved for your app is automatically re-evaluated if the scaling factor changes while the app is running. In addition, when that resource is the image source for an Image object, then one of the source-load events (ImageOpened or ImageFailed) is fired as a result of the system's action of requesting the new resource and then applying it to the Image. The scenario where a run-time scale change might happen is if the user moves your app to a different monitor when more than one is available. As a result, ImageOpened or ImageFailed events can happen at run-time when the scale change is handled, even in cases where the Source is set in XAML.

Constructors

Image()

Initializes a new instance of the Image class.

Properties

AccessKey	Gets or sets the access key (mnemonic) for this element. (Inherited from UIElement)
AccessKeyScopeOwner	Gets or sets a source element that provides the access key scope for this element, even if it's not in the visual tree of the source element. (Inherited from UIElement)
ActualHeight	Gets the rendered height of a FrameworkElement. See Remarks. (Inherited from FrameworkElement)
ActualOffset	Gets the position of this UIElement, relative to its parent, computed during the arrange pass of the layout process. (Inherited from UIElement)
ActualSize	Gets the size that this UIElement computed during the arrange pass of the layout process. (Inherited from UIElement)
ActualTheme	Gets the UI theme that is currently used by the element, which might be different than the RequestedTheme. (Inherited from FrameworkElement)
ActualWidth	Gets the rendered width of a FrameworkElement. See Remarks. (Inherited from FrameworkElement)
AllowDrop	Gets or sets a value that determines whether this UIElement can be a drop target for purposes of drag-and-drop operations. (Inherited from UIElement)
AllowFocusOnInteraction	Gets or sets a value that indicates whether the element automatically gets focus when the user interacts with it. (Inherited from FrameworkElement)
AllowFocusWhenDisabled	Gets or sets whether a disabled control can receive focus. (Inherited from FrameworkElement)
BaseUri	Gets a Uniform Resource Identifier (URI) that represents the base URI for an XAML-constructed object at XAML load time. This property is useful for URI resolution at run time. (Inherited from FrameworkElement)
CacheMode	Gets or sets a value that indicates that rendered content should be cached as a composited bitmap when possible. (Inherited from UIElement)
CanBeScrollAnchor	Gets or sets a value that indicates whether the UIElement can be a candidate for scroll anchoring. (Inherited from UIElement)
CanDrag	Gets or sets a value that indicates whether the element can be dragged as data in a drag-and-drop operation. (Inherited from UIElement)
CenterPoint	Gets or sets the center point of the element, which is the point about which rotation or scaling occurs. Affects the rendering position of the element. (Inherited from UIElement)
Clip	Gets or sets the RectangleGeometry used to define the outline of the contents of a UIElement. (Inherited from UIElement)
CompositeMode	Gets or sets a property that declares alternate composition and blending modes for the element in its parent layout and window. This is relevant for elements that are involved in a mixed XAML / Microsoft DirectX UI. (Inherited from UIElement)
ContextFlyout	Gets or sets the flyout associated with this element. (Inherited from UIElement)
DataContext	Gets or sets the data context for a FrameworkElement. A common use of a data context is when a `FrameworkElement` uses the {Binding} markup extension and participates in data binding. (Inherited from FrameworkElement)
DesiredSize	Gets the size that this UIElement computed during the measure pass of the layout process. (Inherited from UIElement)
Dispatcher	Always returns `null` in a Windows App SDK app. Use DispatcherQueue instead. (Inherited from DependencyObject)
DispatcherQueue	Gets the `DispatcherQueue` that this object is associated with. The `DispatcherQueue` represents a facility that can access the `DependencyObject` on the UI thread even if the code is initiated by a non-UI thread. (Inherited from DependencyObject)
ExitDisplayModeOnAccessKeyInvoked	Gets or sets a value that specifies whether the access key display is dismissed when an access key is invoked. (Inherited from UIElement)
FlowDirection	Gets or sets the direction in which text and other UI elements flow within any parent element that controls their layout. This property can be set to either `LeftToRight` or `RightToLeft`. Setting `FlowDirection` to `RightToLeft` on any element sets the alignment to the right, the reading order to right-to-left and the layout of the control to flow from right to left. (Inherited from FrameworkElement)
FocusState	Gets a value that specifies whether this control has focus, and the mode by which focus was obtained. (Inherited from UIElement)
FocusVisualMargin	Gets or sets the outer margin of the focus visual for a FrameworkElement. (Inherited from FrameworkElement)
FocusVisualPrimaryBrush	Gets or sets the brush used to draw the outer border of a `HighVisibility` or `Reveal` focus visual for a FrameworkElement. (Inherited from FrameworkElement)
FocusVisualPrimaryThickness	Gets or sets the thickness of the outer border of a `HighVisibility` or `Reveal` focus visual for a FrameworkElement. (Inherited from FrameworkElement)
FocusVisualSecondaryBrush	Gets or sets the brush used to draw the inner border of a `HighVisibility` or `Reveal` focus visual for a FrameworkElement. (Inherited from FrameworkElement)
FocusVisualSecondaryThickness	Gets or sets the thickness of the inner border of a `HighVisibility` or `Reveal` focus visual for a FrameworkElement. (Inherited from FrameworkElement)
Height	Gets or sets the suggested height of a FrameworkElement. (Inherited from FrameworkElement)
HighContrastAdjustment	Gets or sets a value that indicates whether the framework automatically adjusts the element's visual properties when high contrast themes are enabled. (Inherited from UIElement)
HorizontalAlignment	Gets or sets the horizontal alignment characteristics that are applied to a FrameworkElement when it is composed in a layout parent, such as a panel or items control. (Inherited from FrameworkElement)
IsAccessKeyScope	Gets or sets a value that indicates whether an element defines its own access key scope. (Inherited from UIElement)
IsDoubleTapEnabled	Gets or sets a value that determines whether the DoubleTapped event can originate from that element. (Inherited from UIElement)
IsHitTestVisible	Gets or sets whether the contained area of this UIElement can return true values for hit testing. (Inherited from UIElement)
IsHoldingEnabled	Gets or sets a value that determines whether the Holding event can originate from that element. (Inherited from UIElement)
IsLoaded	Gets a value that indicates whether the element has been added to the element tree and is ready for interaction. (Inherited from FrameworkElement)
IsRightTapEnabled	Gets or sets a value that determines whether the RightTapped event can originate from that element. (Inherited from UIElement)
IsTabStop	Gets or sets a value that indicates whether a control is included in tab navigation. (Inherited from UIElement)
IsTapEnabled	Gets or sets a value that determines whether the Tapped event can originate from that element. (Inherited from UIElement)
KeyboardAcceleratorPlacementMode	Gets or sets a value that indicates whether the control tooltip displays the key combination for its associated keyboard accelerator. (Inherited from UIElement)
KeyboardAcceleratorPlacementTarget	Gets or sets a value that indicates the control tooltip that displays the accelerator key combination. (Inherited from UIElement)
KeyboardAccelerators	Gets the collection of key combinations that invoke an action using the keyboard. Accelerators are typically assigned to buttons or menu items. Example of a menu showing keyboard accelerators for various menu items (Inherited from UIElement)
KeyTipHorizontalOffset	Gets or sets a value that indicates how far left or right the Key Tip is placed in relation to the UIElement. (Inherited from UIElement)
KeyTipPlacementMode	Gets or sets a value that indicates where the access key Key Tip is placed in relation to the boundary of the UIElement. (Inherited from UIElement)
KeyTipTarget	Gets or sets a value that indicates the element targeted by the access key Key Tip. (Inherited from UIElement)
KeyTipVerticalOffset	Gets or sets a value that indicates how far up or down the Key Tip is placed in relation to the UI element. (Inherited from UIElement)
Language	Gets or sets localization/globalization language information that applies to a FrameworkElement, and also to all child elements of the current FrameworkElement in the object representation and in UI. (Inherited from FrameworkElement)
Lights	Gets the collection of XamlLight objects attached to this element. (Inherited from UIElement)
ManipulationMode	Gets or sets the ManipulationModes value used for UIElement behavior and interaction with gestures. Setting this value enables handling the manipulation events from this element in app code. (Inherited from UIElement)
Margin	Gets or sets the outer margin of a FrameworkElement. (Inherited from FrameworkElement)
MaxHeight	Gets or sets the maximum height constraint of a FrameworkElement. (Inherited from FrameworkElement)
MaxWidth	Gets or sets the maximum width constraint of a FrameworkElement. (Inherited from FrameworkElement)
MinHeight	Gets or sets the minimum height constraint of a FrameworkElement. (Inherited from FrameworkElement)
MinWidth	Gets or sets the minimum width constraint of a FrameworkElement. (Inherited from FrameworkElement)
Name	Gets or sets the identifying name of the object. When a XAML processor creates the object tree from XAML markup, run-time code can refer to the XAML-declared object by this name. (Inherited from FrameworkElement)
NineGrid	Gets or sets a value for a nine-grid metaphor that controls how the image can be resized. The nine-grid metaphor enables you to stretch edges and corners of an image differently than its center. See Remarks for more info and an illustration.
NineGridProperty	Identifies the NineGrid dependency property.
Opacity	Gets or sets the degree of the object's opacity. (Inherited from UIElement)
OpacityTransition	Gets or sets the ScalarTransition that animates changes to the Opacity property. (Inherited from UIElement)
Parent	Gets the parent object of this FrameworkElement in the object tree. (Inherited from FrameworkElement)
PointerCaptures	Gets the set of all captured pointers, represented as Pointer values. (Inherited from UIElement)
Projection	Gets or sets the perspective projection (3-D effect) to apply when rendering this element. (Inherited from UIElement)
ProtectedCursor	Gets or sets the cursor that displays when the pointer is over this element. Defaults to null, indicating no change to the cursor. (Inherited from UIElement)
RasterizationScale	Gets a value that represents the number of raw (physical) pixels for each view pixel. (Inherited from UIElement)
RenderSize	Gets the final render size of a UIElement. Use is not recommended, see Remarks. (Inherited from UIElement)
RenderTransform	Gets or sets transform information that affects the rendering position of a UIElement. (Inherited from UIElement)
RenderTransformOrigin	Gets or sets the origin point of any possible render transform declared by RenderTransform, relative to the bounds of the UIElement. (Inherited from UIElement)
RequestedTheme	Gets or sets the UI theme that is used by the UIElement (and its child elements) for resource determination. The UI theme you specify with `RequestedTheme` can override the app-level RequestedTheme. (Inherited from FrameworkElement)
Resources	Gets the locally defined resource dictionary. In XAML, you can establish resource items as child object elements of a `frameworkElement.Resources` property element, through XAML implicit collection syntax. (Inherited from FrameworkElement)
Rotation	Gets or sets the angle of clockwise rotation, in degrees. Rotates relative to the RotationAxis and the CenterPoint. Affects the rendering position of the element. (Inherited from UIElement)
RotationAxis	Gets or sets the axis to rotate the element around. (Inherited from UIElement)
RotationTransition	Gets or sets the ScalarTransition that animates changes to the Rotation property. (Inherited from UIElement)
Scale	Gets or sets the scale of the element. Scales relative to the element's CenterPoint. Affects the rendering position of the element. (Inherited from UIElement)
ScaleTransition	Gets or sets the Vector3Transition that animates changes to the Scale property. (Inherited from UIElement)
Shadow	Gets or sets the shadow effect cast by the element. (Inherited from UIElement)
Source	Gets or sets the source for the image.
SourceProperty	Identifies the Source dependency property.
Stretch	Gets or sets a value that describes how an Image should be stretched to fill the destination rectangle.
StretchProperty	Identifies the Stretch dependency property.
Style	Gets or sets an instance Style that is applied for this object during layout and rendering. (Inherited from FrameworkElement)
TabFocusNavigation	Gets or sets a value that modifies how tabbing and TabIndex work for this control. (Inherited from UIElement)
TabIndex	Gets or sets a value that determines the order in which elements receive focus when the user navigates through controls using the Tab key. (Inherited from UIElement)
Tag	Gets or sets an arbitrary object value that can be used to store custom information about this object. (Inherited from FrameworkElement)
Transform3D	Gets or sets the 3-D transform effect to apply when rendering this element. (Inherited from UIElement)
TransformMatrix	Gets or sets the transformation matrix to apply to the element. (Inherited from UIElement)
Transitions	Gets or sets the collection of Transition style elements that apply to a UIElement. (Inherited from UIElement)
Translation	Gets or sets the x, y, and z rendering position of the element. (Inherited from UIElement)
TranslationTransition	Gets or sets the Vector3Transition that animates changes to the Translation property. (Inherited from UIElement)
Triggers	Gets the collection of triggers for animations that are defined for a FrameworkElement. Not commonly used. See Remarks. (Inherited from FrameworkElement)
UseLayoutRounding	Gets or sets a value that determines whether rendering for the object and its visual subtree should use rounding behavior that aligns rendering to whole pixels. (Inherited from UIElement)
UseSystemFocusVisuals	Gets or sets a value that indicates whether the control uses focus visuals drawn by the system or focus visuals defined in the control template. (Inherited from UIElement)
VerticalAlignment	Gets or sets the vertical alignment characteristics that are applied to a FrameworkElement when it is composed in a parent object such as a panel or items control. (Inherited from FrameworkElement)
Visibility	Gets or sets the visibility of a UIElement. A `UIElement` that is not visible is not rendered and does not communicate its desired size to layout. (Inherited from UIElement)
Width	Gets or sets the width of a FrameworkElement. (Inherited from FrameworkElement)
XamlRoot	Gets or sets the `XamlRoot` in which this element is being viewed. (Inherited from UIElement)
XYFocusDown	Gets or sets the object that gets focus when a user presses down on the Directional Pad (D-pad) of a game controller. (Inherited from UIElement)
XYFocusDownNavigationStrategy	Gets or sets a value that specifies the strategy used to determine the target element of a down navigation. (Inherited from UIElement)
XYFocusKeyboardNavigation	Gets or sets a value that enables or disables navigation using the keyboard directional arrows. (Inherited from UIElement)
XYFocusLeft	Gets or sets the object that gets focus when a user presses left on the Directional Pad (D-pad) of a game controller. (Inherited from UIElement)
XYFocusLeftNavigationStrategy	Gets or sets a value that specifies the strategy used to determine the target element of a left navigation. (Inherited from UIElement)
XYFocusRight	Gets or sets the object that gets focus when a user presses right on the Directional Pad (D-pad) of a game controller. (Inherited from UIElement)
XYFocusRightNavigationStrategy	Gets or sets a value that specifies the strategy used to determine the target element of a right navigation. (Inherited from UIElement)
XYFocusUp	Gets or sets the object that gets focus when a user presses up on the Directional Pad (D-pad) of a game controller. (Inherited from UIElement)
XYFocusUpNavigationStrategy	Gets or sets a value that specifies the strategy used to determine the target element of an up navigation. (Inherited from UIElement)

Methods

AddHandler(RoutedEvent, Object, Boolean)	Adds a routed event handler for a specified routed event, adding the handler to the handler collection on the current element. Specify `handledEventsToo` as `true` to have the provided handler be invoked even if the event is handled elsewhere. (Inherited from UIElement)
Arrange(Rect)	Positions child objects and determines a size for a UIElement. Parent objects that implement custom layout for their child elements should call this method from their layout override implementations to form a recursive layout update. (Inherited from UIElement)
ArrangeOverride(Size)	Provides the behavior for the "Arrange" pass of layout. Classes can override this method to define their own "Arrange" pass behavior. (Inherited from FrameworkElement)
CancelDirectManipulations()	Cancels ongoing direct manipulation processing (system-defined panning/zooming) on any ScrollViewer parent that contains the current UIElement. (Inherited from UIElement)
CapturePointer(Pointer)	Sets pointer capture to a UIElement. Once captured, only the element that has capture will fire pointer-related events. (Inherited from UIElement)
ClearValue(DependencyProperty)	Clears the local value of a dependency property. (Inherited from DependencyObject)
FindName(String)	Retrieves an object that has the specified identifier name. (Inherited from FrameworkElement)
FindSubElementsForTouchTargeting(Point, Rect)	Enables a UIElement subclass to expose child elements that assist with resolving touch targeting. (Inherited from UIElement)
Focus(FocusState)	Attempts to set focus to this element. (Inherited from UIElement)
GetAlphaMask()	Returns a mask that represents the alpha channel of an image as a CompositionBrush.
GetAnimationBaseValue(DependencyProperty)	Returns any base value established for a dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject)
GetAsCastingSource()	Returns the image as a CastingSource.
GetBindingExpression(DependencyProperty)	Returns the BindingExpression that represents the binding on the specified property. (Inherited from FrameworkElement)
GetChildrenInTabFocusOrder()	Enables a UIElement subclass to expose child elements that take part in Tab focus. (Inherited from UIElement)
GetValue(DependencyProperty)	Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject)
GetVisualInternal()	Retrieves the `Visual` that the element resolves to. (Inherited from UIElement)
GoToElementStateCore(String, Boolean)	When implemented in a derived class, enables per-state construction of a visual tree for a control template in code, rather than by loading XAML for all states at control startup. (Inherited from FrameworkElement)
InvalidateArrange()	Invalidates the arrange state (layout) for a UIElement. After the invalidation, the UIElement will have its layout updated, which will occur asynchronously. (Inherited from UIElement)
InvalidateMeasure()	Invalidates the measurement state (layout) for a UIElement. (Inherited from UIElement)
InvalidateViewport()	Invalidates the viewport state for a UIElement that is used to calculate the effective viewport. (Inherited from FrameworkElement)
Measure(Size)	Updates the DesiredSize of a UIElement. Typically, objects that implement custom layout for their layout children call this method from their own MeasureOverride implementations to form a recursive layout update. (Inherited from UIElement)
MeasureOverride(Size)	Provides the behavior for the "Measure" pass of the layout cycle. Classes can override this method to define their own "Measure" pass behavior. (Inherited from FrameworkElement)
OnApplyTemplate()	Invoked whenever application code or internal processes (such as a rebuilding layout pass) call ApplyTemplate. In simplest terms, this means the method is called just before a UI element displays in your app. Override this method to influence the default post-template logic of a class. (Inherited from FrameworkElement)
OnBringIntoViewRequested(BringIntoViewRequestedEventArgs)	Called before the BringIntoViewRequested event occurs. (Inherited from UIElement)
OnCreateAutomationPeer()	When implemented in a derived class, returns class-specific AutomationPeer implementations for the Microsoft UI Automation infrastructure. (Inherited from UIElement)
OnDisconnectVisualChildren()	Override this method to implement how layout and logic should behave when items are removed from a class-specific content or children property. (Inherited from UIElement)
OnKeyboardAcceleratorInvoked(KeyboardAcceleratorInvokedEventArgs)	Called when a keyboard shortcut (or accelerator) is processed in your app. Override this method to handle how your app responds when a keyboard accelerator is invoked. (Inherited from UIElement)
OnProcessKeyboardAccelerators(ProcessKeyboardAcceleratorEventArgs)	Called just before a keyboard shortcut (or accelerator) is processed in your app. Invoked whenever application code or internal processes call ProcessKeyboardAccelerators. Override this method to influence the default accelerator handling. (Inherited from UIElement)
PopulatePropertyInfo(String, AnimationPropertyInfo)	Defines a property that can be animated. (Inherited from UIElement)
PopulatePropertyInfoOverride(String, AnimationPropertyInfo)	When overridden in a derived class, defines a property that can be animated. (Inherited from UIElement)
ReadLocalValue(DependencyProperty)	Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject)
RegisterPropertyChangedCallback(DependencyProperty, DependencyPropertyChangedCallback)	Registers a notification function for listening to changes to a specific DependencyProperty on this DependencyObject instance. (Inherited from DependencyObject)
ReleasePointerCapture(Pointer)	Releases pointer captures for capture of one specific pointer by this UIElement. (Inherited from UIElement)
ReleasePointerCaptures()	Releases all pointer captures held by this element. (Inherited from UIElement)
RemoveHandler(RoutedEvent, Object)	Removes the specified routed event handler from this UIElement. Typically the handler in question was added by AddHandler. (Inherited from UIElement)
SetBinding(DependencyProperty, BindingBase)	Attaches a binding to a FrameworkElement, using the provided binding object. (Inherited from FrameworkElement)
SetValue(DependencyProperty, Object)	Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject)
StartAnimation(ICompositionAnimationBase)	Begins the specified animation on the element. (Inherited from UIElement)
StartBringIntoView()	Initiates a request to the XAML framework to bring the element into view within any scrollable regions it is contained within. (Inherited from UIElement)
StartBringIntoView(BringIntoViewOptions)	Initiates a request to the XAML framework to bring the element into view using the specified options. (Inherited from UIElement)
StartDragAsync(ExpPointerPoint)	(Inherited from UIElement)
StartDragAsync(PointerPoint)	Initiates a drag-and-drop operation. Important Not supported if a user runs the app in elevated mode, as an administrator. (Inherited from UIElement)
StopAnimation(ICompositionAnimationBase)	Stops the specified animation on the element. (Inherited from UIElement)
TransformToVisual(UIElement)	Returns a transform object that can be used to transform coordinates from the UIElement to the specified object. (Inherited from UIElement)
TryInvokeKeyboardAccelerator(ProcessKeyboardAcceleratorEventArgs)	Attempts to invoke a keyboard shortcut (or accelerator) by searching the entire visual tree of the UIElement for the shortcut. (Inherited from UIElement)
UnregisterPropertyChangedCallback(DependencyProperty, Int64)	Cancels a change notification that was previously registered by calling RegisterPropertyChangedCallback. (Inherited from DependencyObject)
UpdateLayout()	Ensures that all positions of child objects of a UIElement are properly updated for layout. (Inherited from UIElement)

Events

AccessKeyDisplayDismissed	Occurs when access keys should no longer be displayed. (Inherited from UIElement)
AccessKeyDisplayRequested	Occurs when the user requests that access keys be displayed. (Inherited from UIElement)
AccessKeyInvoked	Occurs when a user completes an access key sequence. (Inherited from UIElement)
ActualThemeChanged	Occurs when the ActualTheme property value has changed. (Inherited from FrameworkElement)
BringIntoViewRequested	Occurs when StartBringIntoView is called on this element or one of its descendants. (Inherited from UIElement)
CharacterReceived	Occurs when a single, composed character is received by the input queue. (Inherited from UIElement)
ContextCanceled	Occurs when a context input gesture continues into a manipulation gesture, to notify the element that the context flyout should not be opened. (Inherited from UIElement)
ContextRequested	Occurs when the user has completed a context input gesture, such as a right-click. (Inherited from UIElement)
DataContextChanged	Occurs when the value of the FrameworkElement.DataContext property changes. (Inherited from FrameworkElement)
DoubleTapped	Occurs when an otherwise unhandled DoubleTap interaction occurs over the hit test area of this element. (Inherited from UIElement)
DragEnter	Occurs when the input system reports an underlying drag event with this element as the target. (Inherited from UIElement)
DragLeave	Occurs when the input system reports an underlying drag event with this element as the origin. (Inherited from UIElement)
DragOver	Occurs when the input system reports an underlying drag event with this element as the potential drop target. (Inherited from UIElement)
DragStarting	Occurs when a drag operation is initiated. (Inherited from UIElement)
Drop	Occurs when the input system reports an underlying drop event with this element as the drop target. (Inherited from UIElement)
DropCompleted	Occurs when a drag-and-drop operation with this element as the source is ended. (Inherited from UIElement)
EffectiveViewportChanged	Occurs when the FrameworkElement's effective viewport changes. (Inherited from FrameworkElement)
GettingFocus	Occurs before a UIElement receives focus. This event is raised synchronously to ensure focus isn't moved while the event is bubbling. (Inherited from UIElement)
GotFocus	Occurs when a UIElement receives focus. This event is raised asynchronously, so focus can move again before bubbling is complete. (Inherited from UIElement)
Holding	Occurs when an otherwise unhandled Hold interaction occurs over the hit test area of this element. (Inherited from UIElement)
ImageFailed	Occurs when there is an error associated with image retrieval or format.
ImageOpened	Occurs when the image source is downloaded and decoded with no failure. You can use this event to determine the natural size of the image source.
KeyDown	Occurs when a keyboard key is pressed while the UIElement has focus. (Inherited from UIElement)
KeyUp	Occurs when a keyboard key is released while the UIElement has focus. (Inherited from UIElement)
LayoutUpdated	Occurs when the layout of the visual tree changes, due to layout-relevant properties changing value or some other action that refreshes the layout. (Inherited from FrameworkElement)
Loaded	Occurs when a FrameworkElement has been constructed and added to the object tree, and is ready for interaction. (Inherited from FrameworkElement)
Loading	Occurs when a FrameworkElement begins to load. (Inherited from FrameworkElement)
LosingFocus	Occurs before a UIElement loses focus. This event is raised synchronously to ensure focus isn't moved while the event is bubbling. (Inherited from UIElement)
LostFocus	Occurs when a UIElement loses focus. This event is raised asynchronously, so focus can move again before bubbling is complete. (Inherited from UIElement)
ManipulationCompleted	Occurs when a manipulation on the UIElement is complete. (Inherited from UIElement)
ManipulationDelta	Occurs when the input device changes position during a manipulation. (Inherited from UIElement)
ManipulationInertiaStarting	Occurs when the input device loses contact with the UIElement object during a manipulation and inertia begins. (Inherited from UIElement)
ManipulationStarted	Occurs when an input device begins a manipulation on the UIElement. (Inherited from UIElement)
ManipulationStarting	Occurs when the manipulation processor is first created. (Inherited from UIElement)
NoFocusCandidateFound	Occurs when a user attempts to move focus (via tab or directional arrows), but focus doesn't move because no focus candidate is found in the direction of movement. (Inherited from UIElement)
PointerCanceled	Occurs when a pointer that made contact abnormally loses contact. (Inherited from UIElement)
PointerCaptureLost	Occurs when pointer capture previously held by this element moves to another element or elsewhere. (Inherited from UIElement)
PointerEntered	Occurs when a pointer enters the hit test area of this element. (Inherited from UIElement)
PointerExited	Occurs when a pointer leaves the hit test area of this element. (Inherited from UIElement)
PointerMoved	Occurs when a pointer moves while the pointer remains within the hit test area of this element. (Inherited from UIElement)
PointerPressed	Occurs when the pointer device initiates a Press action within this element. (Inherited from UIElement)
PointerReleased	Occurs when the pointer device that previously initiated a Press action is released, while within this element. Note that the end of a Press action is not guaranteed to fire a `PointerReleased` event; other events may fire instead. For more info, see Remarks. (Inherited from UIElement)
PointerWheelChanged	Occurs when the delta value of a pointer wheel changes. (Inherited from UIElement)
PreviewKeyDown	Occurs when a keyboard key is pressed while the UIElement has focus. (Inherited from UIElement)
PreviewKeyUp	Occurs when a keyboard key is released while the UIElement has focus. (Inherited from UIElement)
ProcessKeyboardAccelerators	Occurs when a keyboard shortcut (or accelerator) is pressed. (Inherited from UIElement)
RightTapped	Occurs when a right-tap input stimulus happens while the pointer is over the element. (Inherited from UIElement)
SizeChanged	Occurs when either the ActualHeight or the ActualWidth property changes value on a FrameworkElement. (Inherited from FrameworkElement)
Tapped	Occurs when an otherwise unhandled Tap interaction occurs over the hit test area of this element. (Inherited from UIElement)
Unloaded	Occurs when this object is no longer connected to the main object tree. (Inherited from FrameworkElement)

Applies to

Udostępnij za pośrednictwem