event-handling

问题 I have a silverlight mvvm application that loads main view with 2 user controls loaded into 2 ContentControls, one with listbox showing items and other with edit button. When i click edit button, 2 new user controls load into the ContentControls, one showing data to edit (EditData) and other having Save and Cancel button (EditAction). When i click save button, it raises an event that is defined in seperate GlobalEvents.cs class like: public event EventHandler OnSaveButtonClicked; public void

问题 i want to my application can prevents from windows shut down. i know that there is a system command to do that. but don't work for my program. i use this code for "cancel" the windows shut down: private void Form1_FormClosing(object sender, FormClosingEventArgs e) { if (e.CloseReason.Equals(CloseReason.WindowsShutDown)) { MessageBox.Show("Cancelling Windows shutdown"); string cmd = "shutdown /a"; Process.Start(cmd);// for executing system command. } } and also use this code, but does not work

问题 I'm having a problem getting mouse wheel scrolling to work in the following XAML, which I have simplified for clarity: <ScrollViewer HorizontalScrollBarVisibility="Visible" VerticalScrollBarVisibility="Visible" CanContentScroll="False" > <Grid MouseDown="Editor_MouseDown" MouseUp="Editor_MouseUp" MouseMove="Editor_MouseMove" Focusable="False" > <Grid.Resources> <DataTemplate DataType="{x:Type local:DataFieldModel}" > <Grid Margin="0,2,2,2" > <TextBox Cursor="IBeam" MouseDown="TextBox

问题 I'm attempting to add an event handler for every control on my form. The form is a simple info box which pops up, and clicking anywhere on it does the same thing (sort of like Outlook's email notifier.) To do this, I've written a recursive method to add a MouseClick handler to each control, as follows: private void AddMouseClickHandler(Control control, MouseEventHandler handler) { control.MouseClick += handler; foreach (Control subControl in control.Controls) AddMouseClickHandler(subControl,

问题 When I want to react to the user selecting a row on a grid, I use this: var grid = new Ext.grid.GridPanel({ region: 'center', ... }); grid.getSelectionModel().on('rowselect', function(sm, index, rec){ changeMenuItemInfoArea(menuItemApplication, 'you are on row with index ' + index) }); how can I attach the same functionality to tabs? something like this: var modules_info_panel = new Ext.TabPanel({ activeTab: 0, region: 'center', defaults:{autoScroll:true}, listeners: { 'tabclick': function

问题 When I use this snippet of code The MessageOutput.Text is set 2 times, which means that the code is executed twice since I don't set the MessageOutput.Text anywhere else. Whenever I get a new message, this method is called and it is supposed to update the UI. Why is this happening and how can I fix it? async void MessageReceived(DatagramSocket socket, DatagramSocketMessageReceivedEventArgs eventArguments) { uint stringLength = eventArguments.GetDataReader().UnconsumedBufferLength; string

问题 This question is possibly a duplicate of How do you add a timer to a C# console application and few other similar questions but couldn't find the answer I'm looking for so asking again. Question : How do you pass data from the Elapsed event of a Timer ( System.Timers.Timer ) to the thread that created the timer (that thread may not be the Main thread but another thread spawned by Main )? I assume there could be some trivial way of achieving this eg. like the BackgroundWorker ProgressChanged

问题 In Laravel 5.2, there is a function already overriden in my AuthController.php : public function sendFailedLoginResponse() { $errors = new MessageBag([ 'email' => ['Error message for email'], 'password' => ['Error message for password'], 'mycustominput' => ['Error message for my custom input field'], ]); return redirect()->back()->withErrors($errors); } This alone works (like magic) via normal FAILED login attempts. (When login is failed, the login form already shows this custom error

问题 I have created a list of items with an object inside my controller $scope.devices = [ {"id": 0, "name": "sw", "class": 'sw' }, {"id": 1, "name": "mlr", "class": 'mlr'}, {"id": 2, "name": "lvm", "class": 'lvm'}, {"id": 3, "name": "ltc", "class": 'ltc'}, {"id": 4, "name": "fr", "class": 'fr'}, {"id": 5, "name": "cap", "class": 'cap'} ]; and ng-repeat in my HTML <li ng-repeat="device in devices" ng-click="selected(device.id)"></li> I can keep track of an item that is clicked with $scope.selected

问题 This question is a follow up of post Failed to set event handler in javascript I want to add an event handler for input text controls. The input box control is generated dynamically. My code is like: _inputbox = document.createElement("input"); _inputbox.type = "text"; _inputbox.id = settings[zindex]; _inputbox.onblur = checkName; checkName() is defined previously. But when I input something in the box and move the focus to other control, the checkName() isn't executed. In the DOM tab of