Microsoft® Visual Basic® .NET Programmer's Cookbook

Use a One-Way Method

Problem

You want a method in a remote object to perform a long task, and you don’t want to force the client to wait while the method code executes.

Solution

Create a one-way method by applying the OneWay attribute from the System.Runtime.Remoting.Messaging namespace.

Discussion

With one-way methods, the client sends a request message, and the remote object responds immediately to indicate it has begun processing. This has several consequences:

• The client doesn’t need to wait while the method code executes.

• The method can’t return any information to the client, either through a return value or ByRef parameter.

• If the method throws an unhandled exception, it won’t be propagated back to the client.

To create a one-way method, you need ...