TaskFactory.FromAsync(Of TResult) Method (Func(Of AsyncCallback, Object, IAsyncResult), Func(Of IAsyncResult, TResult), Object)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Creates a Task(Of TResult) that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.
Assembly: mscorlib (in mscorlib.dll)
'Declaration Public Function FromAsync(Of TResult) ( _ beginMethod As Func(Of AsyncCallback, Object, IAsyncResult), _ endMethod As Func(Of IAsyncResult, TResult), _ state As Object _ ) As Task(Of TResult)
Type Parameters
- TResult
The type of the result available through the Task(Of TResult).
Parameters
- beginMethod
- Type: System.Func(Of AsyncCallback, Object, IAsyncResult)
The delegate that begins the asynchronous operation.
- endMethod
- Type: System.Func(Of 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(Of TResult)The created Task(Of TResult) that represents the asynchronous operation.
| 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. |
Show: