TaskFactory.FromAsync Method (Func(Of AsyncCallback, Object, IAsyncResult), Action(Of IAsyncResult), Object)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Creates a Task 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 ( _ beginMethod As Func(Of AsyncCallback, Object, IAsyncResult), _ endMethod As Action(Of IAsyncResult), _ state As Object _ ) As Task
Parameters
- beginMethod
- Type: System.Func(Of AsyncCallback, Object, IAsyncResult)
The delegate that begins the asynchronous operation.
- endMethod
- Type: System.Action(Of IAsyncResult)
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.TaskThe created Task 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. |
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