event-handling

1.st part of the quesion: What is the difference between these 2 event registrations ? _popUp.AddHandler(PreviewMouseLeftButtonDownEvent, new MouseButtonEventHandler(PopUp_PreviewMouseLeftButtonDown)); _popUp.PreviewMouseLeftButtonDown += new MouseButtonEventHandler(_popUp_PreviewMouseLeftButtonDown); 2.nd part of the question: or eventually versus popUp.Opened += PopUp_Opened; According to Redgate's Reflector , there is no difference. Both methods eventually call the internal method EventHandlerStore.AddRoutedEventHandler . This is the reflector output of the add accessor for the

I'm wondering why should I use a class that inherits from the EventArgs class instead of using a custom class that will do the same job for me when passing event data? Deanna You don't have to inherit from EventArgs , but it allows people using your classes to use and handle generic *Handler(object sender, EventArgs e) declarations. If you don't inherit from EventArgs , then they have to use explicitly typed *Handler(object sender, YairsFakeEventArgs e) The same goes for just using custom delegates but they are a lot more explicitly different. Because your event-args class will be compatible

How can I raise an event from a SWF file loaded into a Flex application (using SWFLoader)? I want to be able to detect a) when a button is pressed b) when the animation ends You'll need to do 2 things: Dispatch an event from the loaded swf. Make sure the event bubbles if you sent it from nested views. Bubbling can be set through the bubbles property of the event. Listen to the event from your main application. I think you should be able to do that on the content property of the SWFLoader instance. mySWFLoader.content.addEventListener("myEvent", myEventHandler); I took a lazier approach for

I have a method to detect the left click event that visual studio made by double clicking on the form. private void pictureBox1_Click(object sender, EventArgs e) { MessageBox.Show("Left click"); } I want to have a right-click event by right-clicking on the same object. I read online that you can use this switch: private void pictureBox1_Click(object sender, EventArgs e) { if (e.Button == System.Windows.Forms.MouseButtons.Right){MessageBox.Show("Right click");} if (e.Button == System.Windows.Forms.MouseButtons.Left){MessageBox.Show("Left click");} } The trouble is that when I do this e.Button

I have a div element with several elements inside it like buttons and so forth which have event handlers attached to them. I know its possible to go: $("#button1").off() To remove the handler for a button but I would like to do something like this if possible: $("#div1").removeChildHandlers(); Is there a native function in JQuery to do this or would I have to loop them all the elements and remove 1 by 1? jQuery will do the looping for you for just the direct children: $("#div1").children().off(); or if you want all descendants: $("#div1").find("*").off(); Does this help: $("#div1").find('*')