TaskFactory(Of TResult).FromAsync(Of TArg1) Method (Func(Of TArg1, AsyncCallback, Object, IAsyncResult), Func(Of IAsyncResult, TResult), TArg1, 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(Of TArg1) ( _ beginMethod As Func(Of TArg1, AsyncCallback, Object, IAsyncResult), _ endMethod As Func(Of IAsyncResult, TResult), _ arg1 As TArg1, _ state As Object _ ) As Task(Of TResult)
Type Parameters
- TArg1
The type of the first argument passed to the beginMethod delegate.
Parameters
- beginMethod
- Type: System.Func(Of TArg1, AsyncCallback, Object, IAsyncResult)
The delegate that begins the asynchronous operation.
- endMethod
- Type: System.Func(Of IAsyncResult, TResult)
The delegate that ends the asynchronous operation.
- arg1
- Type: TArg1
The first argument passed to the beginMethod delegate.
- 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 that represents the asynchronous operation.
| Exception | Condition |
|---|---|
| ArgumentNullException | The beginMethod argument is Nothing. -or- The endMethod argument is Nothing. |
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