I read a lot of materials but I still did not understand, can someone explain me, please? What do I know: Declare an event: public event MyEvent myEvent; Vs. declare EventHandler: public E...

I have the 3 methods below in a razor file protected override async Task OnInitializedAsync() { EditContext = new EditContext(_projectModel); EditContext.OnFieldChanged += EditContext_OnFieldCh...

Is it permitted to convert a usual event handler from void to Task based, and await it like below? Something.PropertyChanged += async (o, args) => await IsButtonVisible_PropertyChanged(o, args);...

I am learning javafx.scene.control.ContextMenu, and right now I am facing a problem: how do I get the clicked Object from EventHandler? both event.source() and event.target() return the MenuItem. ...

Before starting this question, i have to say I really searched everywhere to find the answer but nothing found. Also tried manythings like dispatchevent, postmessage, ... but nothing worked. Here...

I'm hoping this doesn't get marked as "duplicate", because I have reviewed several threads and followed the advice I found. I know I'm missing something simple, and need other eyes on this. I'm a n...

in my uwp app I just added a new page and navigated to it, and I have nothing on that page just the default grid. but I am trying to recieve keydown events which is not firing up by any key at all....

I have some sample code which binds an event handler as follows: var h1=document.querySelector('h1'); h1.onclick=doit; function doit(x) { console.log(x); } When the event handler is triggered ...

The following code I'm using to Identify the browser window close event and works as intended on other browsers but not on IE11. As this line of code gives me undefined only on IE11 alert(event.cli...

I have two grid which contains delete button and I am using RadAjaxManager which will fire ajax request from client side to server side OnajaxRequest which contain event handlers and that event han...

I want to catch the PowerModeChanged event before the computer or notebook is suspended. My code snippet is the following: void SystemEvents_OnPowerChanged(object sender, PowerModeChangedEventArg...

the more I dig into C# and the GC I find more and more things I'm not quite sure about. I always thought that the Dispose and the respective Finalizer is only necessary when having some unmanaged r...

There are basically two patterns in avoiding duplicated registering of event handlers: (According to this discussion: C# pattern to prevent an event handler hooked twice) Using System.Linq namesp...

Ok, I have been trying to figure this out for a long time now and finally have the time to investigate. As the title suggests "What is the difference"? I know that this works the way I want it to. ...