event-handling

问题 I'm creating an ASP.NET Custom Control for my web application which is basically an ASP.NET Button control contained inside multiple <div> elements (for styling purposes). How can I create a Click event handler for my custom control so that my control acts as an ASP.NET Button? Ie. <cc:Button id="myButton" runat="server" Text="Submit" /> Sub myButton_Click(sender as object, e as EventArgs) Handles myButton.Click End Sub 回答1: In the code behind, declare an event in your class: Public Event

问题 I was writing some tests for one of my classes and I needed to test that an event was being raised. Out of just trying it and seeing what happened I coded something similar to the following extremely simplified code. public class MyEventClass { public event EventHandler MyEvent; public void MethodThatRaisesMyEvent() { if (MyEvent != null) MyEvent(this, new EventArgs()); } } [TestClass] public class MyEventClassTest { [TestMethod] public void EventRaised() { bool raised = false; var subject =

问题 I’m passing a bool to a method in another class by reference, so that I can change it (-the original argument) from within the method. I also want an event (which is subscribed to by that method) to be able to change it. Doing this: class myCheckBox : CheckBox { bool b1; public myCheckBox(ref bool b) { b1 = b; this.CheckedChanged += new EventHandler(myCheckBox_CheckedChanged); } void myCheckBox_CheckedChanged(object sender, EventArgs e) { b1 = Checked; } } doesn’t help, since b1 is only a

问题 I am working through the "iPhone introduction for programmers" tutorial at http://www.raywenderlich.com/21320/objectively-speaking-a-crash-course-in-objective-c-ios6, and my present project is at http://JonathansCorner.com/project/Quotes.tgz. The tutorial's focus is on providing an iPhone app that randomly displays one of several quotes in a Text View when you click on a Button. Later on the tutorial pushes further by defining properties and storing and retrieving XML, but I'm at the first "

问题 Attempting to implement a playlist function along with a listening history. Thumbnails of videos for the playlist are dynamically dragged/dropped/sorted by the user into a div. Each time a thumbnail is clicked, the video is loaded in the player and the video is added to the history ( subHist.click() ). Because the videos are dynamically created, I cannot create the event listener to move on to the next video at the beginning, and have to add it later. The problem with that is I have the

问题 Which one is the right one? This one: protected override void Dispose(bool disposing) { if (disposing && (components != null)) { this.ctlRBContent1_GetBuildName -= _ctlBottom.GetBuildName; components.Dispose(); } base.Dispose(disposing); } OR This one: ~ ctlRemoteBuildContent1() { this.ctlRBContent1_GetBuildName -= _ctlBottom.GetBuildName; } I tried to toggle this 2 functions. When I did UserControl disposing, it didn't jump into the toggle line :/ 回答1: If you clean up in a destructor, there

问题 Perhaps this is a misconception of mine, but I thought that when you create a custom event, and later create "elements with event listeners" (listening for that event), that the event (itself) keeps track of all the listeners who are waiting for the event to occur and that when the event occurs all listeners are automatically notified. However, in all the examples I've seen, it looks like the notification-process is very explicit (not very automatic); you have to manually code the dispatching

问题 I am new to javascript, so please bare with me.Everyone on this site is so amazing to us newbies so thank you in advance.So here is where I am... I am building a really generic music app(sorta). It wont be used in any real scenerio, it is simply to learn and understand js. So I am stuck in a couple places. I have a constructor for my array object, i push albums into the array then display them into a table that can be organized in different ways onclick of buttons. Now I am trying to have a

问题 I'm using Angular 6. I have a table row ( <TR> ) with a click event. For testing purposes let's just say the event prints "quack!" to the console. This is the HTML: <tr *ngFor="let t of things" (click)="quack()"> ... </tr> In the component: quack() { console.log('quack!'); } Now, within this row I have a checkbox. It's a Bootstrap 4 custom checkbox but I don't think that's material to the problem I need to solve. That checkbox has a custom directive which adds a change event handler (not a

问题 i write a Outlook Addin which should change an Contactitem after write. i use ItemChange EventHandler folder.ItemChange += new Outlook.ItemsEvents_ItemChangeEventHandler(ContactItemChange); but when i am editing an item, my Code always run in background and so i can't editing my Item. I have tried item.AfterWrite and item.Write but the Event will never Triggered. private void ContactItemChange(object item) { if (item is ContactItem) { ((ContactItem)item).AfterWrite += ThisAddIn_Write; } }