TaskFactory<TResult>.FromAsync Method

Reference

Definition

Namespace:: System.Threading.Tasks

Assemblies:: mscorlib.dll, System.Threading.Tasks.dll

Assemblies:: netstandard.dll, System.Runtime.dll

Assembly:: System.Threading.Tasks.dll

Assembly:: System.Runtime.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Creates a task instance.

Overloads

FromAsync(IAsyncResult, Func<IAsyncResult,TResult>)	Creates a task that executes an end method function when a specified IAsyncResult completes.
FromAsync(Func<AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, Object)	Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.
FromAsync(IAsyncResult, Func<IAsyncResult,TResult>, TaskCreationOptions)	Creates a task that executes an end method function when a specified IAsyncResult completes.
FromAsync(Func<AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, Object, TaskCreationOptions)	Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.
FromAsync(IAsyncResult, Func<IAsyncResult,TResult>, TaskCreationOptions, TaskScheduler)	Creates a task that executes an end method function when a specified IAsyncResult completes.
FromAsync<TArg1,TArg2,TArg3>(Func<TArg1,TArg2,TArg3,AsyncCallback, Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, TArg2, TArg3, Object, TaskCreationOptions)	Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.
FromAsync<TArg1,TArg2,TArg3>(Func<TArg1,TArg2,TArg3,AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, TArg2, TArg3, Object)	Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.
FromAsync<TArg1,TArg2>(Func<TArg1,TArg2,AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, TArg2, Object, TaskCreationOptions)	Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.
FromAsync<TArg1,TArg2>(Func<TArg1,TArg2,AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, TArg2, Object)	Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.
FromAsync<TArg1>(Func<TArg1,AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, Object)	Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.
FromAsync<TArg1>(Func<TArg1,AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, Object, TaskCreationOptions)	Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.

FromAsync(IAsyncResult, Func<IAsyncResult,TResult>)

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Creates a task that executes an end method function when a specified IAsyncResult completes.

public:
 System::Threading::Tasks::Task<TResult> ^ FromAsync(IAsyncResult ^ asyncResult, Func<IAsyncResult ^, TResult> ^ endMethod);

public System.Threading.Tasks.Task<TResult> FromAsync(IAsyncResult asyncResult, Func<IAsyncResult,TResult> endMethod);

member this.FromAsync : IAsyncResult * Func<IAsyncResult, 'Result> -> System.Threading.Tasks.Task<'Result>

Public Function FromAsync (asyncResult As IAsyncResult, endMethod As Func(Of IAsyncResult, TResult)) As Task(Of TResult)

Parameters

asyncResult: IAsyncResult

The IAsyncResult whose completion should trigger the processing of the endMethod.

endMethod: Func<IAsyncResult,TResult>

The function delegate that processes the completed asyncResult.

Returns

Task<TResult>

A Task<TResult> that represents the asynchronous operation.

Exceptions

ArgumentNullException

The asyncResult argument is null.

-or-

The endMethod argument is null.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

FromAsync(Func<AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, Object)

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.

public:
 System::Threading::Tasks::Task<TResult> ^ FromAsync(Func<AsyncCallback ^, System::Object ^, IAsyncResult ^> ^ beginMethod, Func<IAsyncResult ^, TResult> ^ endMethod, System::Object ^ state);

public System.Threading.Tasks.Task<TResult> FromAsync(Func<AsyncCallback,object,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, object state);

public System.Threading.Tasks.Task<TResult> FromAsync(Func<AsyncCallback,object?,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, object? state);

member this.FromAsync : Func<AsyncCallback, obj, IAsyncResult> * Func<IAsyncResult, 'Result> * obj -> System.Threading.Tasks.Task<'Result>

Public Function FromAsync (beginMethod As Func(Of AsyncCallback, Object, IAsyncResult), endMethod As Func(Of IAsyncResult, TResult), state As Object) As Task(Of TResult)

Parameters

beginMethod: Func<AsyncCallback,Object,IAsyncResult>

The delegate that begins the asynchronous operation.

endMethod: Func<IAsyncResult,TResult>

The delegate that ends the asynchronous operation.

state: Object

An object containing data to be used by the beginMethod delegate.

Returns

Task<TResult>

The created task that represents the asynchronous operation.

Exceptions

ArgumentNullException

The beginMethod argument is null.

-or-

The endMethod argument is null.

Remarks

This method throws any exceptions thrown by the beginMethod. Exceptions for endmethod are thrown when waiting on the returned task.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

FromAsync(IAsyncResult, Func<IAsyncResult,TResult>, TaskCreationOptions)

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Creates a task that executes an end method function when a specified IAsyncResult completes.

public:
 System::Threading::Tasks::Task<TResult> ^ FromAsync(IAsyncResult ^ asyncResult, Func<IAsyncResult ^, TResult> ^ endMethod, System::Threading::Tasks::TaskCreationOptions creationOptions);

public System.Threading.Tasks.Task<TResult> FromAsync(IAsyncResult asyncResult, Func<IAsyncResult,TResult> endMethod, System.Threading.Tasks.TaskCreationOptions creationOptions);

member this.FromAsync : IAsyncResult * Func<IAsyncResult, 'Result> * System.Threading.Tasks.TaskCreationOptions -> System.Threading.Tasks.Task<'Result>

Public Function FromAsync (asyncResult As IAsyncResult, endMethod As Func(Of IAsyncResult, TResult), creationOptions As TaskCreationOptions) As Task(Of TResult)

Parameters

asyncResult: IAsyncResult

The IAsyncResult whose completion should trigger the processing of the endMethod.

endMethod: Func<IAsyncResult,TResult>

The function delegate that processes the completed asyncResult.

creationOptions: TaskCreationOptions

One of the enumeration values that controls the behavior of the created task.

Returns

Task<TResult>

A task that represents the asynchronous operation.

Exceptions

ArgumentNullException

The asyncResult argument is null.

-or-

The endMethod argument is null.

ArgumentOutOfRangeException

The creationOptions argument specifies an invalid value.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

FromAsync(Func<AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, Object, TaskCreationOptions)

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.

public:
 System::Threading::Tasks::Task<TResult> ^ FromAsync(Func<AsyncCallback ^, System::Object ^, IAsyncResult ^> ^ beginMethod, Func<IAsyncResult ^, TResult> ^ endMethod, System::Object ^ state, System::Threading::Tasks::TaskCreationOptions creationOptions);

public System.Threading.Tasks.Task<TResult> FromAsync(Func<AsyncCallback,object,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, object state, System.Threading.Tasks.TaskCreationOptions creationOptions);

public System.Threading.Tasks.Task<TResult> FromAsync(Func<AsyncCallback,object?,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, object? state, System.Threading.Tasks.TaskCreationOptions creationOptions);

member this.FromAsync : Func<AsyncCallback, obj, IAsyncResult> * Func<IAsyncResult, 'Result> * obj * System.Threading.Tasks.TaskCreationOptions -> System.Threading.Tasks.Task<'Result>

Public Function FromAsync (beginMethod As Func(Of AsyncCallback, Object, IAsyncResult), endMethod As Func(Of IAsyncResult, TResult), state As Object, creationOptions As TaskCreationOptions) As Task(Of TResult)

Parameters

beginMethod: Func<AsyncCallback,Object,IAsyncResult>

The delegate that begins the asynchronous operation.

endMethod: Func<IAsyncResult,TResult>

The delegate that ends the asynchronous operation.

state: Object

An object containing data to be used by the beginMethod delegate.

creationOptions: TaskCreationOptions

One of the enumeration values that controls the behavior of the created task.

Returns

Task<TResult>

The created Task<TResult> that represents the asynchronous operation.

Exceptions

ArgumentNullException

The beginMethod argument is null.

-or-

The endMethod argument is null.

ArgumentOutOfRangeException

The creationOptions argument specifies an invalid value.

Remarks

This method throws any exceptions thrown by the beginMethod. Exceptions for endmethod are thrown when waiting on the returned task.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

FromAsync(IAsyncResult, Func<IAsyncResult,TResult>, TaskCreationOptions, TaskScheduler)

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Creates a task that executes an end method function when a specified IAsyncResult completes.

public:
 System::Threading::Tasks::Task<TResult> ^ FromAsync(IAsyncResult ^ asyncResult, Func<IAsyncResult ^, TResult> ^ endMethod, System::Threading::Tasks::TaskCreationOptions creationOptions, System::Threading::Tasks::TaskScheduler ^ scheduler);

public System.Threading.Tasks.Task<TResult> FromAsync(IAsyncResult asyncResult, Func<IAsyncResult,TResult> endMethod, System.Threading.Tasks.TaskCreationOptions creationOptions, System.Threading.Tasks.TaskScheduler scheduler);

member this.FromAsync : IAsyncResult * Func<IAsyncResult, 'Result> * System.Threading.Tasks.TaskCreationOptions * System.Threading.Tasks.TaskScheduler -> System.Threading.Tasks.Task<'Result>

Public Function FromAsync (asyncResult As IAsyncResult, endMethod As Func(Of IAsyncResult, TResult), creationOptions As TaskCreationOptions, scheduler As TaskScheduler) As Task(Of TResult)

Parameters

asyncResult: IAsyncResult

The IAsyncResult whose completion should trigger the processing of the endMethod.

endMethod: Func<IAsyncResult,TResult>

The function delegate that processes the completed asyncResult.

creationOptions: TaskCreationOptions

One of the enumeration values that controls the behavior of the created task.

scheduler: TaskScheduler

The task scheduler that is used to schedule the task that executes the end method.

Returns

Task<TResult>

The created task that represents the asynchronous operation.

Exceptions

ArgumentNullException

The asyncResult argument is null.

-or-

The endMethod argument is null.

-or-

The scheduler argument is null.

ArgumentOutOfRangeException

The creationOptions parameter specifies an invalid value.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

FromAsync<TArg1,TArg2,TArg3>(Func<TArg1,TArg2,TArg3,AsyncCallback, Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, TArg2, TArg3, Object, TaskCreationOptions)

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.

public:
generic <typename TArg1, typename TArg2, typename TArg3>
 System::Threading::Tasks::Task<TResult> ^ FromAsync(Func<TArg1, TArg2, TArg3, AsyncCallback ^, System::Object ^, IAsyncResult ^> ^ beginMethod, Func<IAsyncResult ^, TResult> ^ endMethod, TArg1 arg1, TArg2 arg2, TArg3 arg3, System::Object ^ state, System::Threading::Tasks::TaskCreationOptions creationOptions);

public System.Threading.Tasks.Task<TResult> FromAsync<TArg1,TArg2,TArg3>(Func<TArg1,TArg2,TArg3,AsyncCallback,object,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, TArg1 arg1, TArg2 arg2, TArg3 arg3, object state, System.Threading.Tasks.TaskCreationOptions creationOptions);

public System.Threading.Tasks.Task<TResult> FromAsync<TArg1,TArg2,TArg3>(Func<TArg1,TArg2,TArg3,AsyncCallback,object?,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, TArg1 arg1, TArg2 arg2, TArg3 arg3, object? state, System.Threading.Tasks.TaskCreationOptions creationOptions);

member this.FromAsync : Func<'TArg1, 'TArg2, 'TArg3, AsyncCallback, obj, IAsyncResult> * Func<IAsyncResult, 'Result> * 'TArg1 * 'TArg2 * 'TArg3 * obj * System.Threading.Tasks.TaskCreationOptions -> System.Threading.Tasks.Task<'Result>

Public Function FromAsync(Of TArg1, TArg2, TArg3) (beginMethod As Func(Of TArg1, TArg2, TArg3, AsyncCallback, Object, IAsyncResult), endMethod As Func(Of IAsyncResult, TResult), arg1 As TArg1, arg2 As TArg2, arg3 As TArg3, state As Object, creationOptions As TaskCreationOptions) As Task(Of TResult)

Type Parameters

TArg1

The type of the second argument passed to beginMethod delegate.

TArg2

The type of the third argument passed to beginMethod delegate.

TArg3

The type of the first argument passed to the beginMethod delegate.

Parameters

beginMethod: Func<TArg1,TArg2,TArg3,AsyncCallback,Object,IAsyncResult>

The delegate that begins the asynchronous operation.

endMethod: Func<IAsyncResult,TResult>

The delegate that ends the asynchronous operation.

arg1: TArg1

The first argument passed to the beginMethod delegate.

arg2: TArg2

The second argument passed to the beginMethod delegate.

arg3: TArg3

The third argument passed to the beginMethod delegate.

state: Object

An object containing data to be used by the beginMethod delegate.

creationOptions: TaskCreationOptions

An object that controls the behavior of the created task.

Returns

Task<TResult>

The created task that represents the asynchronous operation.

Exceptions

ArgumentNullException

The beginMethod argument is null.

-or-

The endMethod argument is null.

ArgumentOutOfRangeException

The creationOptions parameter specifies an invalid value.

Remarks

This method throws any exceptions thrown by the beginMethod. Exceptions for endmethod are thrown when waiting on the returned task.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

FromAsync<TArg1,TArg2,TArg3>(Func<TArg1,TArg2,TArg3,AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, TArg2, TArg3, Object)

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.

public:
generic <typename TArg1, typename TArg2, typename TArg3>
 System::Threading::Tasks::Task<TResult> ^ FromAsync(Func<TArg1, TArg2, TArg3, AsyncCallback ^, System::Object ^, IAsyncResult ^> ^ beginMethod, Func<IAsyncResult ^, TResult> ^ endMethod, TArg1 arg1, TArg2 arg2, TArg3 arg3, System::Object ^ state);

public System.Threading.Tasks.Task<TResult> FromAsync<TArg1,TArg2,TArg3>(Func<TArg1,TArg2,TArg3,AsyncCallback,object,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, TArg1 arg1, TArg2 arg2, TArg3 arg3, object state);

public System.Threading.Tasks.Task<TResult> FromAsync<TArg1,TArg2,TArg3>(Func<TArg1,TArg2,TArg3,AsyncCallback,object?,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, TArg1 arg1, TArg2 arg2, TArg3 arg3, object? state);

member this.FromAsync : Func<'TArg1, 'TArg2, 'TArg3, AsyncCallback, obj, IAsyncResult> * Func<IAsyncResult, 'Result> * 'TArg1 * 'TArg2 * 'TArg3 * obj -> System.Threading.Tasks.Task<'Result>

Public Function FromAsync(Of TArg1, TArg2, TArg3) (beginMethod As Func(Of TArg1, TArg2, TArg3, AsyncCallback, Object, IAsyncResult), endMethod As Func(Of IAsyncResult, TResult), arg1 As TArg1, arg2 As TArg2, arg3 As TArg3, state As Object) As Task(Of TResult)

Type Parameters

TArg1

The type of the second argument passed to beginMethod delegate.

TArg2

The type of the third argument passed to beginMethod delegate.

TArg3

The type of the first argument passed to the beginMethod delegate.

Parameters

beginMethod: Func<TArg1,TArg2,TArg3,AsyncCallback,Object,IAsyncResult>

The delegate that begins the asynchronous operation.

endMethod: Func<IAsyncResult,TResult>

The delegate that ends the asynchronous operation.

arg1: TArg1

The first argument passed to the beginMethod delegate.

arg2: TArg2

The second argument passed to the beginMethod delegate.

arg3: TArg3

The third argument passed to the beginMethod delegate.

state: Object

An object containing data to be used by the beginMethod delegate.

Returns

Task<TResult>

The created task that represents the asynchronous operation.

Exceptions

ArgumentNullException

The beginMethod argument is null.

-or-

The endMethod argument is null.

Remarks

This method throws any exceptions thrown by the beginMethod. Exceptions for endmethod are thrown when waiting on the returned task.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

FromAsync<TArg1,TArg2>(Func<TArg1,TArg2,AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, TArg2, Object, TaskCreationOptions)

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.

public:
generic <typename TArg1, typename TArg2>
 System::Threading::Tasks::Task<TResult> ^ FromAsync(Func<TArg1, TArg2, AsyncCallback ^, System::Object ^, IAsyncResult ^> ^ beginMethod, Func<IAsyncResult ^, TResult> ^ endMethod, TArg1 arg1, TArg2 arg2, System::Object ^ state, System::Threading::Tasks::TaskCreationOptions creationOptions);

public System.Threading.Tasks.Task<TResult> FromAsync<TArg1,TArg2>(Func<TArg1,TArg2,AsyncCallback,object,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, TArg1 arg1, TArg2 arg2, object state, System.Threading.Tasks.TaskCreationOptions creationOptions);

public System.Threading.Tasks.Task<TResult> FromAsync<TArg1,TArg2>(Func<TArg1,TArg2,AsyncCallback,object?,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, TArg1 arg1, TArg2 arg2, object? state, System.Threading.Tasks.TaskCreationOptions creationOptions);

member this.FromAsync : Func<'TArg1, 'TArg2, AsyncCallback, obj, IAsyncResult> * Func<IAsyncResult, 'Result> * 'TArg1 * 'TArg2 * obj * System.Threading.Tasks.TaskCreationOptions -> System.Threading.Tasks.Task<'Result>

Public Function FromAsync(Of TArg1, TArg2) (beginMethod As Func(Of TArg1, TArg2, AsyncCallback, Object, IAsyncResult), endMethod As Func(Of IAsyncResult, TResult), arg1 As TArg1, arg2 As TArg2, state As Object, creationOptions As TaskCreationOptions) As Task(Of TResult)

Type Parameters

TArg1

The type of the second argument passed to beginMethod delegate.

TArg2

The type of the first argument passed to the beginMethod delegate.

Parameters

beginMethod: Func<TArg1,TArg2,AsyncCallback,Object,IAsyncResult>

The delegate that begins the asynchronous operation.

endMethod: Func<IAsyncResult,TResult>

The delegate that ends the asynchronous operation.

arg1: TArg1

The first argument passed to the beginMethod delegate.

arg2: TArg2

The second argument passed to the beginMethod delegate.

state: Object

An object containing data to be used by the beginMethod delegate.

creationOptions: TaskCreationOptions

An object that controls the behavior of the created Task<TResult>.

Returns

Task<TResult>

The created task that represents the asynchronous operation.

Exceptions

ArgumentNullException

The beginMethod argument is null.

-or-

The endMethod argument is null.

ArgumentOutOfRangeException

The creationOptions parameter specifies an invalid value.

Remarks

This method throws any exceptions thrown by the beginMethod. Exceptions for endmethod are thrown when waiting on the returned task.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

FromAsync<TArg1,TArg2>(Func<TArg1,TArg2,AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, TArg2, Object)

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.

public:
generic <typename TArg1, typename TArg2>
 System::Threading::Tasks::Task<TResult> ^ FromAsync(Func<TArg1, TArg2, AsyncCallback ^, System::Object ^, IAsyncResult ^> ^ beginMethod, Func<IAsyncResult ^, TResult> ^ endMethod, TArg1 arg1, TArg2 arg2, System::Object ^ state);

public System.Threading.Tasks.Task<TResult> FromAsync<TArg1,TArg2>(Func<TArg1,TArg2,AsyncCallback,object,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, TArg1 arg1, TArg2 arg2, object state);

public System.Threading.Tasks.Task<TResult> FromAsync<TArg1,TArg2>(Func<TArg1,TArg2,AsyncCallback,object?,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, TArg1 arg1, TArg2 arg2, object? state);

member this.FromAsync : Func<'TArg1, 'TArg2, AsyncCallback, obj, IAsyncResult> * Func<IAsyncResult, 'Result> * 'TArg1 * 'TArg2 * obj -> System.Threading.Tasks.Task<'Result>

Public Function FromAsync(Of TArg1, TArg2) (beginMethod As Func(Of TArg1, TArg2, AsyncCallback, Object, IAsyncResult), endMethod As Func(Of IAsyncResult, TResult), arg1 As TArg1, arg2 As TArg2, state As Object) As Task(Of TResult)

Type Parameters

TArg1

The type of the second argument passed to beginMethod delegate.

TArg2

The type of the first argument passed to the beginMethod delegate.

Parameters

beginMethod: Func<TArg1,TArg2,AsyncCallback,Object,IAsyncResult>

The delegate that begins the asynchronous operation.

endMethod: Func<IAsyncResult,TResult>

The delegate that ends the asynchronous operation.

arg1: TArg1

The first argument passed to the beginMethod delegate.

arg2: TArg2

The second argument passed to the beginMethod delegate.

state: Object

An object containing data to be used by the beginMethod delegate.

Returns

Task<TResult>

The created task that represents the asynchronous operation.

Exceptions

ArgumentNullException

The beginMethod argument is null.

-or-

The endMethod argument is null.

Remarks

This method throws any exceptions thrown by the beginMethod. Exceptions for endmethod are thrown when waiting on the returned task.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

FromAsync<TArg1>(Func<TArg1,AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, Object)

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.

public:
generic <typename TArg1>
 System::Threading::Tasks::Task<TResult> ^ FromAsync(Func<TArg1, AsyncCallback ^, System::Object ^, IAsyncResult ^> ^ beginMethod, Func<IAsyncResult ^, TResult> ^ endMethod, TArg1 arg1, System::Object ^ state);

public System.Threading.Tasks.Task<TResult> FromAsync<TArg1>(Func<TArg1,AsyncCallback,object,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, TArg1 arg1, object state);

public System.Threading.Tasks.Task<TResult> FromAsync<TArg1>(Func<TArg1,AsyncCallback,object?,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, TArg1 arg1, object? state);

member this.FromAsync : Func<'TArg1, AsyncCallback, obj, IAsyncResult> * Func<IAsyncResult, 'Result> * 'TArg1 * obj -> System.Threading.Tasks.Task<'Result>

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: Func<TArg1,AsyncCallback,Object,IAsyncResult>

The delegate that begins the asynchronous operation.

endMethod: Func<IAsyncResult,TResult>

The delegate that ends the asynchronous operation.

arg1: TArg1

The first argument passed to the beginMethod delegate.

state: Object

An object containing data to be used by the beginMethod delegate.

Returns

Task<TResult>

The created task that represents the asynchronous operation.

Exceptions

ArgumentNullException

The beginMethod argument is null.

-or-

The endMethod argument is null.

Remarks

This method throws any exceptions thrown by the beginMethod. Exceptions for endmethod are thrown when waiting on the returned task.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

FromAsync<TArg1>(Func<TArg1,AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, Object, TaskCreationOptions)

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Source:: FutureFactory.cs

Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.

public:
generic <typename TArg1>
 System::Threading::Tasks::Task<TResult> ^ FromAsync(Func<TArg1, AsyncCallback ^, System::Object ^, IAsyncResult ^> ^ beginMethod, Func<IAsyncResult ^, TResult> ^ endMethod, TArg1 arg1, System::Object ^ state, System::Threading::Tasks::TaskCreationOptions creationOptions);

public System.Threading.Tasks.Task<TResult> FromAsync<TArg1>(Func<TArg1,AsyncCallback,object,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, TArg1 arg1, object state, System.Threading.Tasks.TaskCreationOptions creationOptions);

public System.Threading.Tasks.Task<TResult> FromAsync<TArg1>(Func<TArg1,AsyncCallback,object?,IAsyncResult> beginMethod, Func<IAsyncResult,TResult> endMethod, TArg1 arg1, object? state, System.Threading.Tasks.TaskCreationOptions creationOptions);

member this.FromAsync : Func<'TArg1, AsyncCallback, obj, IAsyncResult> * Func<IAsyncResult, 'Result> * 'TArg1 * obj * System.Threading.Tasks.TaskCreationOptions -> System.Threading.Tasks.Task<'Result>

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, creationOptions As TaskCreationOptions) As Task(Of TResult)

Type Parameters

TArg1

The type of the first argument passed to the beginMethod delegate.

Parameters

beginMethod: Func<TArg1,AsyncCallback,Object,IAsyncResult>

The delegate that begins the asynchronous operation.

endMethod: Func<IAsyncResult,TResult>

The delegate that ends the asynchronous operation.

arg1: TArg1

The first argument passed to the beginMethod delegate.

state: Object

An object containing data to be used by the beginMethod delegate.

creationOptions: TaskCreationOptions

One of the enumeration values that controls the behavior of the created task.

Returns

Task<TResult>

The created task that represents the asynchronous operation.

Exceptions

ArgumentNullException

The beginMethod argument is null.

-or-

The endMethod argument is null.

ArgumentOutOfRangeException

The creationOptions parameter specifies an invalid value.

Remarks

This method throws any exceptions thrown by the beginMethod. Exceptions for endmethod are thrown when waiting on the returned task.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

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TaskFactory<TResult>.FromAsync Method

Definition

Overloads

FromAsync(IAsyncResult, Func<IAsyncResult,TResult>)

Parameters

Returns

Exceptions

See also

Applies to

FromAsync(Func<AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, Object)

Parameters

Returns

Exceptions

Remarks

See also

Applies to

FromAsync(IAsyncResult, Func<IAsyncResult,TResult>, TaskCreationOptions)

Parameters

Returns

Exceptions

See also

Applies to

FromAsync(Func<AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, Object, TaskCreationOptions)

Parameters

Returns

Exceptions

Remarks

See also

Applies to

FromAsync(IAsyncResult, Func<IAsyncResult,TResult>, TaskCreationOptions, TaskScheduler)

Parameters

Returns

Exceptions

See also

Applies to

FromAsync<TArg1,TArg2,TArg3>(Func<TArg1,TArg2,TArg3,AsyncCallback, Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, TArg2, TArg3, Object, TaskCreationOptions)

Type Parameters

Parameters

Returns

Exceptions

Remarks

See also

Applies to

FromAsync<TArg1,TArg2,TArg3>(Func<TArg1,TArg2,TArg3,AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, TArg2, TArg3, Object)

Type Parameters

Parameters

Returns

Exceptions

Remarks

See also

Applies to

FromAsync<TArg1,TArg2>(Func<TArg1,TArg2,AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, TArg2, Object, TaskCreationOptions)

Type Parameters

Parameters

Returns

Exceptions

Remarks

See also

Applies to

FromAsync<TArg1,TArg2>(Func<TArg1,TArg2,AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, TArg2, Object)

Type Parameters

Parameters

Returns

Exceptions

Remarks

See also

Applies to

FromAsync<TArg1>(Func<TArg1,AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, Object)

Type Parameters

Parameters

Returns

Exceptions

Remarks

See also

Applies to

FromAsync<TArg1>(Func<TArg1,AsyncCallback,Object,IAsyncResult>, Func<IAsyncResult,TResult>, TArg1, Object, TaskCreationOptions)

Type Parameters

Parameters

Returns