Questions tagged [eventhandler]
In object-oriented programming languages (such as C++, Lazarus Pascal or Visual Basic), visual objects (or components) can respond to *events* (usually) by the user. An event handler is the block of code that runs when an event occurs. Eg: *Onclick* event for a command button.
eventhandler
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Is the following code in c# cause memory leak issue?
I was wondering if the following code create a memory leak:
using System;
namespace ConsoleApplicationTest
{
internal class Program
{
static void Main(string[] args)
{
...
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How do I use Declarative Services to ensure that EventAdmin is not null?
Im new to OSGi and I tried to create a simple EventPublisher/-Admin application using DS to ensure that the EventAdmin is not null. But I'm not sure how to use the DS in the right way.
The Activator ...
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what is the best jsript event handler to use when data is change through other script for select? [duplicate]
I am trying to make, the value for the value media and unit media, change when the object is select, yes the object do change when I change upon the available item to select, but my target is to ...
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vote
1
answer
265
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Visual Studio 2022 (C++) "Add Event Handler..." generating bad names
I am working on an MFC application with a Ribbon Bar and am experiencing difficulty adding event handlers for new controls from the Ribbon Designer. This was working fine the last time I edited the ...
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React event handler is not working at all [duplicate]
import React from 'react';
import './Button.css';
import iconsdown from './iconsdown.png' ;
import iconsnext from './iconsnext.png';
function Button() {
const handleEvent=(e) =>{
console....
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1
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0
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112
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DataGrid Event Handler has an error that prevents the live view from being updated
I am having an interesting issue. I am using Visual Studio 2022. In my XAML code, I have a DataGrid with EventSetter. The Handler is alerting on "Invalid value for property 'Handler'. This error ...
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Updating multiple input fields onchange in react
I really hope that you guys can help me with this.
Basically, I am creating an invoice form where users can add multiple items. I have 4 fields for those items: ItemName, ItemPrice (unit price), ...
2
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277
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NullReferenceException thrown but the object passed the null check, how is that possible?
I'm using the AddEventHandler method from that answer, but when doing it on an EventHandler with a value type argument that happens:
using System.Reflection;
public class Program
{
public static ...
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0
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Emit was called after an event handler completed normally [Flutter]
Exception is thrown on second call 'emit' inside 'firstEvent' case. I know why, but I dont know how to make it work. Problem exists when I use event.map.
_AssertionError
emit was called after an event ...
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Serialising an HTML element that has event handlers
I am currently making a website for a class that I am in. It is supposed to be a store, made in Pure HTML, CSS, and JavaScript (no libraries including jQuery). I am currently attempting at making a ...
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How to make circles around Marker be created and removed when Marker is clicked on the react-leaflet
I think this problem is to use Popup or eventHandler. But when i used Popup, The circle is created but not removed.
And I have no idea how to make a circle using eventHandlers.
This First Code is use ...
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How do you change the value to an acceptable value after a NumberBox's ValueChanged event is triggered using WinUI3?
I have a list of Images with corresponding NumberBoxes in a GridView. This is the XAML:
<DataTemplate
x:Key="CardListView_ItemTemplate"
x:DataType="local:CardItem">
...
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2
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How to pass EventHandler as parameter in Blazor
Trying to pass an EventHandler to a Blazor component. Error I'm getting:
The event AppState.IntegerChanged can only appear on the left hand side of +=
Seems like this should work, is it a blazor ...
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How to fix a Function for Button click event executes on page load [closed]
In my MERN app I am trying to take a screenshot of a portion of the webpage to send it to the database with other info that is submitted such as submitter and description. The problem is, the image is ...
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eventHandler trigger multiple times when using .on() only
function changeStatus() {
$('#dataTable tbody').on('change', '.orderStatus', function () {..code}
}
function showOrdersInModal() {
$('#dataTable tbody').on('click', '.fa-eye-btn', function (e) ...
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