Detect focus initiated by tab key?

I know you have accepted an answer but you could test the button pressed using the following: $(‘#detect’).on(‘focus’, function(e){ $(window).keyup(function (e) { var code = (e.keyCode ? e.keyCode : e.which); if (code == 9) { alert(‘I was tabbed!’); } }); }); http://jsfiddle.net/LPGLm/1/ Edit: change the listener around: $(window).keyup(function (e) { var code = (e.keyCode ? … Read more

Explain ExtJS 4 event handling

Let’s start by describing DOM elements’ event handling. DOM node event handling First of all you wouldn’t want to work with DOM node directly. Instead you probably would want to utilize Ext.Element interface. For the purpose of assigning event handlers, Element.addListener and Element.on (these are equivalent) were created. So, for example, if we have html: … Read more

How to unsubscribe from an event which uses a lambda expression?

First of all… yes its a good way of doing it, it’s clean, small form and easy to read & understand… the caveat of course is “Unless you later want to unsubscribe”. I believe Jon Skeet pointed out before that “the specification explicitly doesn’t guarantee the behaviour either way when it comes to equivalence of … Read more

What event catches a change of value in a combobox in a DataGridViewCell?

The above answer led me down the primrose path for awhile. It does not work as it causes multiple events to fire and just keeps adding events. The problem is that the above catches the DataGridViewEditingControlShowingEvent and it does not catch the value changed. So it will fire every time you focus then leave the … Read more

asp.net dynamically button with event handler

You must have to place that code in page_load or page_init event. protected void Page_Load() { Button ButtonChange = new Button(); ButtonChange.Text = “Change”; ButtonChange.ID = “change_” + i.ToString(); ButtonChange.Font.Size = FontUnit.Point(7); ButtonChange.ControlStyle.CssClass = “button”; ButtonChange.Click += new EventHandler(test); } Read MSDN article – How to: Add Controls to an ASP.NET Web Page Programmatically?