LateBoundBitmapDecoder Class
Definition
Important
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Defines a decoder that requires delayed bitmap creation such as asynchronous image downloads.
public ref class LateBoundBitmapDecoder sealed : System::Windows::Media::Imaging::BitmapDecoderpublic sealed class LateBoundBitmapDecoder : System.Windows.Media.Imaging.BitmapDecodertype LateBoundBitmapDecoder = class
inherit BitmapDecoderPublic NotInheritable Class LateBoundBitmapDecoder
Inherits BitmapDecoder- Inheritance
Remarks
A LateBoundBitmapDecoder is used when DelayCreation is specified. The Decoder property creates the necessary "real decoder" on an on-demand basis. All decoder properties return null while content is downloading.
A LateBoundBitmapDecoder can also be created when the system has an image that is being asynchronously downloaded locally. In this case, the decoder also returns null for properties until the image has been downloaded. The application can check the IsDownloading property or add a delegate for the DownloadCompleted event to monitor the download status. Furthermore, any frames obtained from a LateBoundBitmapDecoder while the image is downloading will return a width/height of 1,1 until the frames have finished downloading.
BitmapFrame objects that are returned by this class are frozen and are therefore immutable.
Properties
| CodecInfo |
Gets information that describes this codec. |
| ColorContexts |
Gets a value that represents the color profile that is associated with a bitmap, if one is defined. |
| Decoder |
Gets the underlying decoder that is associated with this late-bound decoder. |
| Dispatcher |
Gets the Dispatcher this DispatcherObject is associated with. (Inherited from DispatcherObject) |
| Frames |
Gets the content of an individual frame within a bitmap. |
| IsDownloading |
Gets a value that indicates whether the decoder is currently downloading content. |
| Metadata |
Gets an instance of BitmapMetadata that represents the global metadata associated with this bitmap, if metadata is defined. (Inherited from BitmapDecoder) |
| Palette |
Gets the BitmapPalette that is associated with this decoder. |
| Preview |
Gets a BitmapSource that represents the global preview of this bitmap, if one is defined. |
| Thumbnail |
Gets a BitmapSource that represents the thumbnail of the bitmap, if one is defined. |
Methods
| CheckAccess() |
Determines whether the calling thread has access to this DispatcherObject. (Inherited from DispatcherObject) |
| CreateInPlaceBitmapMetadataWriter() |
Creates an instance of InPlaceBitmapMetadataWriter, which can be used to update the metadata of a bitmap. (Inherited from BitmapDecoder) |
| Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
| GetHashCode() |
Serves as the default hash function. (Inherited from Object) |
| GetType() |
Gets the Type of the current instance. (Inherited from Object) |
| MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
| ToString() |
Converts the current value of a BitmapDecoder to a String. (Inherited from BitmapDecoder) |
| VerifyAccess() |
Enforces that the calling thread has access to this DispatcherObject. (Inherited from DispatcherObject) |
Events
| DownloadCompleted |
Occurs when a BitmapDecoder has finished downloading bitmap content. (Inherited from BitmapDecoder) |
| DownloadFailed |
Occurs when bitmap content failed to download. (Inherited from BitmapDecoder) |
| DownloadProgress |
Occurs when a BitmapDecoder has made progress downloading bitmap content. (Inherited from BitmapDecoder) |
