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This article mainly shows you "VB.NET how to achieve remote events", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "how to achieve remote events in VB.NET" this article.

Completing the task of triggering events between different projects is not possible in VB. But in VB.NET we can use the Event and RaiseEvent keywords and use the Delegate keyword to implement it. If you want to trigger an event from a VB.NET project and receive that trigger in another project, we must use the concept of event and Delegate.

Execute VB.NET remote event source

While we are still using the VB.NET event statement to trigger events, we need to declare events differently if we want code in other RaiseEventures to receive code. Specifically, we need to define the event as a delegate outside the class by using the delete statement where we want to trigger the event. Then create a new class library, name it EventSource, and add a simple class named RemoteClass.

Suppose we want to trigger an event that returns a string parameter. We first declare a Delegate using the type of the parameter:

Public Delegate Sub RemoteEventHandler (ByVal SomeString As String)

Normally, VB.NET automatically creates this Delegate. However, sometimes this Delegate cannot be accessed from other projects, so we still declare it explicitly.

Here is the class we created that triggers the event:

Public Class RemoteClass Public Event RemoteEvent As RemoteEventHandler Public Sub DoSomething () RaiseEvent RemoteEvent (anyevent) End Sub End Class

The successful implementation of this function depends on the definition of the event itself:

Public Event RemoteEvent As RemoteEventHandler

This event does not explicitly define its parameters, but relies on Delegate to define it. Instead, this event is defined as a special type, that is, the type we just defined Delegate.

In addition, the code used to trigger the event simply applies a simple RaiseEvent statement:

RaiseEvent RemoteEvent (anyevent)

The parameter values provided by this statement are used for the return value when the event is triggered.

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