AsyncOperationProgressHandler<TResult,TProgress> 委托

定义

命名空间:

Windows.Foundation

表示处理提供进度更新的异步操作的进度更新事件的方法。

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.FoundationContract, 65536)]
/// [Windows.Foundation.Metadata.Guid(1432946946, 2731, 16922, 135, 120, 248, 206, 80, 38, 215, 88)]
template <typename TResult, typename TProgress>
class AsyncOperationProgressHandler : MulticastDelegate

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.FoundationContract), 65536)]
[Windows.Foundation.Metadata.Guid(1432946946, 2731, 16922, 135, 120, 248, 206, 80, 38, 215, 88)]
public delegate void AsyncOperationProgressHandler<TResult,TProgress>(IAsyncOperationWithProgress<TResult,TProgress> asyncInfo, TProgress progressInfo);

Public Delegate Sub AsyncOperationProgressHandler(Of TResult, TProgress)(asyncInfo As IAsyncOperationWithProgress(Of TResult, TProgress), progressInfo As TProgress)

类型参数

TResult

TProgress

参数

asyncInfo

IAsyncOperationWithProgress<TResult,TProgress>

异步操作。

progressInfo

TProgress

进度信息。

属性

ContractVersionAttribute GuidAttribute

Windows 要求

设备系列	Windows 10 (在 10.0.10240.0 中引入)
API contract	Windows.Foundation.FoundationContract (在 v1.0 中引入)

示例

有关演示如何处理 Progress 事件的示例 C++/WinRT 代码，请参阅异步操作和操作的委托类型。