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AsyncCodeActivity.BeginExecute Method

When implemented in a derived class and using the specified execution context, callback method, and user state, enqueues an asynchronous activity in a run-time workflow.

Namespace:  System.Activities
Assembly:  System.Activities (in System.Activities.dll)

protected abstract IAsyncResult BeginExecute(
	AsyncCodeActivityContext context,
	AsyncCallback callback,
	Object state
)

Parameters

context
Type: System.Activities.AsyncCodeActivityContext

Information that defines the execution environment for the AsyncCodeActivity.

callback
Type: System.AsyncCallback

The method to be called after the asynchronous activity and completion notification have occurred.

state
Type: System.Object

An object that saves variable information for an instance of an asynchronous activity.

Return Value

Type: System.IAsyncResult
The object that saves variable information for an instance of an asynchronous activity.

The following example shows how to override the BeginExecute method in a custom activity.

protected override IAsyncResult BeginExecute(AsyncCodeActivityContext context, AsyncCallback callback, object state)
{
    string tempFileName = Path.GetTempFileName();
    Console.WriteLine("Writing to file: " + tempFileName);

    FileStream file = File.Open(tempFileName, FileMode.Create);

    context.UserState = file;

    byte[] bytes = UnicodeEncoding.Unicode.GetBytes("123456789");
    return file.BeginWrite(bytes, 0, bytes.Length, callback, state);
}

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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