WindowsRuntimeSystemExtensions.AsTask<TResult, TProgress> Method (<TResult, TProgress>, CancellationToken, IProgress<TProgress>)

July 28, 2014

For apps that target Windows Phone OS 7.0 and 7.1, do not use any members of this type in your app. If you do, your code will throw a MethodAccessException. This type is security-critical, which restricts it to internal use by the .NET Framework for Windows Phone class library.

Returns a task that represents a Windows Runtime asynchronous operation that returns a result, reports progress, and can be cancelled.

Namespace:  System
Assembly:  System.Runtime.WindowsRuntime (in System.Runtime.WindowsRuntime.dll)

public static Task<TResult> AsTask<TResult, TProgress>(
	this IAsyncOperationWithProgress<TResult, TProgress> source,
	CancellationToken cancellationToken,
	IProgress<TProgress> progress

Type Parameters


The type of object that returns the result of the asynchronous operation.


The type of object that provides data that indicates progress.


Type: IAsyncOperationWithProgress<TResult, TProgress>
The asynchronous operation.
Type: System.Threading.CancellationToken
A token that can be used to request cancellation of the asynchronous operation.
Type: System.IProgress<TProgress>
An object that receives progress updates.

Return Value

Type: System.Threading.Tasks.Task<TResult>
A task that represents the asynchronous operation.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IAsyncOperationWithProgress<TResult, TProgress>. When you use instance method syntax to call this method, omit the first parameter.

Windows Phone OS

Supported in: 8.1, 8.0

© 2014 Microsoft