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TaskFactory::FromAsync<TResult> Method (Func<AsyncCallback^, Object^, IAsyncResult^>^, Func<IAsyncResult^, TResult>^, Object^)
.NET Framework (current version)
Creates a Task<TResult> that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.
Assembly: mscorlib (in mscorlib.dll)
public: generic<typename TResult> Task<TResult>^ FromAsync( Func<AsyncCallback^, Object^, IAsyncResult^>^ beginMethod, Func<IAsyncResult^, TResult>^ endMethod, Object^ state )
Parameters
- beginMethod
-
Type:
System::Func<AsyncCallback^, Object^, IAsyncResult^>^
The delegate that begins the asynchronous operation.
- endMethod
-
Type:
System::Func<IAsyncResult^, TResult>^
The delegate that ends the asynchronous operation.
- state
-
Type:
System::Object^
An object containing data to be used by the beginMethod delegate.
Return Value
Type: System.Threading.Tasks::Task<TResult>^The created Task<TResult> that represents the asynchronous operation.
Type Parameters
- TResult
The type of the result available through the Task<TResult>.
| Exception | Condition |
|---|---|
| ArgumentNullException | The exception that is thrown when the beginMethod argument is null. -or- The exception that is thrown when the endMethod argument is null. |
This method throws any exceptions thrown by the beginMethod.
Universal Windows Platform
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 5.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 5.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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