MediaPropertySet 类
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
表示一组媒体属性。
public ref class MediaPropertySet sealed : IIterable<IKeyValuePair<Platform::Guid, Platform::Object ^> ^>, IMap<Platform::Guid, Platform::Object ^>
/// [Windows.Foundation.Metadata.Activatable(65536, Windows.Foundation.UniversalApiContract)]
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.HasVariant]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class MediaPropertySet final : IIterable<IKeyValuePair<winrt::guid, IInspectable const&>>, IMap<winrt::guid, IInspectable const&>
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.HasVariant]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
class MediaPropertySet final : IIterable<IKeyValuePair<winrt::guid, IInspectable const&>>, IMap<winrt::guid, IInspectable const&>
[Windows.Foundation.Metadata.Activatable(65536, typeof(Windows.Foundation.UniversalApiContract))]
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.HasVariant]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class MediaPropertySet : IDictionary<Guid,object>, IEnumerable<KeyValuePair<Guid,object>>
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.HasVariant]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
public sealed class MediaPropertySet : IDictionary<Guid,object>, IEnumerable<KeyValuePair<Guid,object>>
function MediaPropertySet()
Public NotInheritable Class MediaPropertySet
Implements IDictionary(Of Guid, Object), IEnumerable(Of KeyValuePair(Of Guid, Object))
- 继承
- 属性
- 实现
-
IMap<Guid,Object> IDictionary<Guid,Object> IMap<Platform::Guid,Platform::Object> IMap<winrt::guid,IInspectable> IIterable<IKeyValuePair<K,V>> IEnumerable<KeyValuePair<K,V>> IIterable<IKeyValuePair<Guid,Object>> IEnumerable<KeyValuePair<Guid,Object>> IIterable<IKeyValuePair<Platform::Guid,Platform::Object>> IIterable<IKeyValuePair<winrt::guid,IInspectable>>
Windows 要求
设备系列 |
Windows 10 (在 10.0.10240.0 中引入)
|
API contract |
Windows.Foundation.UniversalApiContract (在 v1.0 中引入)
|
注解
此对象不会直接实例化,它通过检索以下属性之一返回:
- AudioEncodingProperties.Properties
- ContainerEncodingProperties.Properties
- ImageEncodingProperties.Properties
- VideoEncodingProperties.Properties
- IMediaEncodingProperties.Properties
有关使用属性集集合的信息,请参阅 PropertySet。
集合成员列表
对于 JavaScript,MediaPropertySet 支持使用索引访问项。
构造函数
MediaPropertySet() |
为 MediaPropertySet 创建实例。 |
属性
Size |
获取属性集中包含的项数。 |
方法
Clear() |
从属性集中删除所有项。 |
First() |
返回一个迭代器,用于枚举属性集中的项。 |
GetView() |
返回属性集的不可变视图。 |
HasKey(Guid) |
指示属性集是否具有具有指定键的项。 |
Insert(Guid, Object) |
将项添加到属性集。 |
Lookup(Guid) |
检索指定键的值。 |
Remove(Guid) |
从属性集中删除项。 |