Textbox1.Invoke(new MethodInvoker(delegate )) ĭo your serious processing in the separate thread before you attempt to switch back to the control's thread. The solution you want then should look like: UserContrl1_LOadDataMethod() So only accessing the value so that corresponding data can be fetched from the database. Related Query Finding and invoking a generic overloaded method Invoke generics overloaded method using reflection Java to C conversion finding public fields. I'm not going to do it ever from a child thread. I don't want to change the value of a control from the child thread. Situation is this: I want to load data into a global variable based on the value of a control. I guess I have not presented the question properly. MyButton.As per Prerak K's update comment (since deleted): Equivalent code using an inner class instead of EventHandler. Interface and adding an instance of it to the button: The same effect, with some additional compile-time type safety,īy defining a new implementation of the ActionListener (ActionListener)EventHandler.create(ActionListener.class, frame, "toFront")) įrame.toFront() will be executed. That invokes the toFront method on an instance In the following example we create an ActionListener The simplest use of EventHandler is to installĪ listener that calls a method on the target object with no arguments. The following section gives examples of how to create listener The message (method) to be sent, and any argument This listener object uses an EventHandler objectīehind the scenes to encapsulate information about theĮvent, the object to be sent a message when the event occurs, The calling of method depends upon the type of object that calls the static method. Instead, you use one of the EventHandler create methods to createĪn object that implements a given listener interface. No, we cannot override static methods because method overriding is based on dynamic binding at runtime and the static methods are bonded using static binding at compile time. You don't generally deal directly with EventHandler To be created per listener type (interface),Īpproach requires one class to be created per listener The Proxy class require one listener class The EventHandler relies, shares implementationsĪll the ActionListeners in an application,Īll the action listeners will be instances of a single class ![]() The reason that listeners created with EventHandlerįootprint is that the Proxy class, on which Reduce the disk and memory footprint of the application. Which the same interface is implemented many times can ![]() With the long-term persistence scheme than inner classes.Īlso, using EventHandler in large applications in Handles only a subset of what is possible using innerĬlasses. Inner classes are another, more general way to handle events from The method is isolated from the user interface layer. Of the check box and passing it directly to the method so that That accepts a boolean value can deal with extracting the state The most effectiveĬonnections of this kind isolate the application logic from the user To an application logic bean (the target). Typically connections are made from a user interface bean ![]() The EventHandler class is intended to be used by interactive tools, such asĪpplication builders, that allow developers to make connections betweenīeans. Support for dynamically generating event listeners whose methodsĮxecute a simple statement involving an incoming event object
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