WindowsRuntimeSystemExtensions::AsAsyncAction Method
Returns a Windows Runtime asynchronous action that represents a started task.
Namespace: System
Assembly: System.Runtime.WindowsRuntime (in System.Runtime.WindowsRuntime.dll)
Parameters
- source
- Type: System.Threading.Tasks::Task
The started task.
Return Value
Type: IAsyncActionA Windows.Foundation.IAsyncAction instance that represents the started task.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type Task. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).| Exception | Condition |
|---|---|
| ArgumentNullException | source is nullptr. |
| InvalidOperationException | source is an unstarted task. |
Use this method when you want to pass a task to a Windows Runtime method that takes an asynchronous action.
The AsyncInfo class provides static methods (Shared methods in Visual Basic) that create and start Windows Runtime asynchronous actions that represent tasks that can respond to cancellation requests and report progress.