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TaskFactory<TResult>.FromAsync Method (IAsyncResult, Func<IAsyncResult, TResult>, TaskCreationOptions, TaskScheduler)

Creates a Task<TResult> that executes an end method function when a specified IAsyncResult completes.

Namespace:  System.Threading.Tasks
Assembly:  mscorlib (in mscorlib.dll)

public Task<TResult> FromAsync(
	IAsyncResult asyncResult,
	Func<IAsyncResult, TResult> endMethod,
	TaskCreationOptions creationOptions,
	TaskScheduler scheduler
)

Parameters

asyncResult
Type: System.IAsyncResult
The IAsyncResult whose completion should trigger the processing of the endMethod.
endMethod
Type: System.Func<IAsyncResult, TResult>
The function delegate that processes the completed asyncResult.
creationOptions
Type: System.Threading.Tasks.TaskCreationOptions
The TaskCreationOptions value that controls the behavior of the created Task<TResult>.
scheduler
Type: System.Threading.Tasks.TaskScheduler
The TaskScheduler that is used to schedule the task that executes the end method.

Return Value

Type: System.Threading.Tasks.Task<TResult>
The created Task<TResult> that represents the asynchronous operation.

ExceptionCondition
ArgumentNullException

The exception that is thrown when the asyncResult argument is null.

-or-

The exception that is thrown when the endMethod argument is null.

-or-

The exception that is thrown when the scheduler argument is null.

ArgumentOutOfRangeException

The exception that is thrown when the creationOptions argument specifies an invalid TaskCreationOptions value.

Silverlight

Supported in: 5

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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