How to unsubscribe from abby fine scanner

How to unsubscribe from abby fine scanner code#

You cannot easily unsubscribe from an event if you used an anonymous function to subscribe to it. String s = o.ToString() + ' ' + e.ToString() publisher.RaiseCustomEvent += (object o, CustomEventArgs e) => Note that the subscriber class needs a reference to publisher in order to subscribe to its events. In the following example, assume that an object named publisher has an event named RaiseCustomEvent and that a CustomEventArgs class has also been defined to carry some kind of specialized event information. If you don't have to unsubscribe from an event later, you can use the addition assignment operator ( +=) to attach an anonymous function as an event handler. To subscribe to events by using an anonymous function MessageBox.Show(((MouseEventArgs)e).Location.ToString()) You can also use a lambda expression to specify an event handler: public Form1() publisher.RaiseCustomEvent += HandleCustomEvent Note that the subscriber class needs a reference to the publisher class in order to subscribe to its events. In the following example, assume that an object named publisher has an event named RaiseCustomEvent. Use the addition assignment operator ( +=) to attach an event handler to the event.

How to unsubscribe from abby fine scanner code#

For example, if the event is based on the EventHandler delegate type, the following code represents the method stub: void HandleCustomEvent(object sender, CustomEventArgs a) It resembles this: this.Load += new System.EventHandler(this.Form1_Load) Дefine an event handler method whose signature matches the delegate signature for the event. The line of code that is required to subscribe to the event is also automatically generated in the InitializeComponent method in the file in your project. Add your form load event handling code here. private void Form1_Load(object sender, System.EventArgs e) For example, the following lines of code declare an event handler method that will be called when the Form class raises the Load event. Alternatively you can add the code manually in Code view. Visual C# creates an empty event handler method and adds it to your code. On top of the Properties window, click the Events icon.Дouble-click the event that you want to create, for example the Load event. If you cannot see the Properties window, in Design view, right-click the form or control for which you want to create an event handler, and select Properties. To subscribe to events by using the Visual Studio IDE For example, you might subscribe to a button's click event in order to make your application do something useful when the user clicks the button. You subscribe to an event that is published by another class when you want to write custom code that is called when that event is raised.