This documentation is archived and is not being maintained.

PageAsyncTask Constructor (BeginEventHandler, EndEventHandler, EndEventHandler, Object, Boolean)

Initializes a new instance of the PageAsyncTask class using the specified value for executing in parallel.

Namespace:  System.Web.UI
Assembly:  System.Web (in System.Web.dll)

public PageAsyncTask(
	BeginEventHandler beginHandler,
	EndEventHandler endHandler,
	EndEventHandler timeoutHandler,
	Object state,
	bool executeInParallel


Type: System.Web.BeginEventHandler
The handler to call when beginning an asynchronous task.
Type: System.Web.EndEventHandler
The handler to call when the task is completed successfully within the time-out period.
Type: System.Web.EndEventHandler
The handler to call when the task is not completed successfully within the time-out period.
Type: System.Object
The object that represents the state of the task.
Type: System.Boolean
The value that indicates whether the task can be processed in parallel with other tasks.


The beginHandler parameter or endHandler parameter is not specified.

This implementation of the constructor allows you to set whether the asynchronous task will be processed in parallel with other tasks on the page.

The following code example creates three asynchronous tasks that are processed in parallel to each other. This example is part of a larger example found in the PageAsyncTask class overview.

PageAsyncTask asyncTask1 = new PageAsyncTask(slowTask1.OnBegin, slowTask1.OnEnd, slowTask1.OnTimeout, "Async1", true);
PageAsyncTask asyncTask2 = new PageAsyncTask(slowTask2.OnBegin, slowTask2.OnEnd, slowTask2.OnTimeout, "Async2", true);
PageAsyncTask asyncTask3 = new PageAsyncTask(slowTask3.OnBegin, slowTask3.OnEnd, slowTask3.OnTimeout, "Async3", true);

// Register the asynchronous task.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.