一个按钮单击事件:private void button1_Click(object sender, RoutedEventArgs e) { Messagebox.show(“消息框提示”); } 我们大家看到这个事件的例子时,我们可能会对括号里的一个object类的一个对象sender产生疑惑,那么sender是指的是什么呢? 按照编程的专业术语来说,sender 指的是触发事件的对象。通俗一点来讲,...
可以看到wpf中所有的事件都是这个格式: private void btnTest_Click(objectsender, RoutedEventArgs e) { Button btn = (Button)sender; btn.Content = "i am the soure contrl"; } 其中的sender 指的是事件源,也就是触发该事件的控件
private void Grid_PreviewMouseDown(object sender, MouseButtonEventArgs e) { Console.WriteLine("Grid PreviewMouseDown"); e.Handled = true; // 停止事件传播 } private void Button_PreviewMouseDown(object sender, MouseButtonEventArgs e) { Console.WriteLine("Button PreviewMouseDown"); } 1. 2. 3. 4....
Cloud Studio代码运行 publicpartialclassMainWindow:Window{privatereadonly Regex _urlPattern=newRegex(@"\w*://\w*(.\w*)+");publicMainWindow(){InitializeComponent();}//省略了那些事件处理程序privatevoidUrlTextBox_KeyDown(object sender,KeyEventArgs e){if(e.Key==Key.Return){varurl=UrlTextBox.Text...
classF2:FrameworkElement{publicF2(){Width=500;Height=500;Loaded+=F2_Loaded;}protectedoverride SizeMeasureOverride(Size availableSize){Debug.WriteLine("F2 MeasureOverride");returnbase.MeasureOverride(availableSize);}privatevoidF2_Loaded(object sender,RoutedEventArgs e){Debug.WriteLine(nameof(F2_Loaded));}...
{// InitializeComponent call is required to merge the UI// that is defined in markup with this class, including// setting properties and registering event handlersInitializeComponent(); }voidbutton_Click(objectsender, RoutedEventArgs e){// Show message box when button is clicked.MessageBox.Show("...
private void Button_Click(object sender, RoutedEventArgs e) { // Create a window and make the current window its owner var ownedWindow = new ChildWindow1(); ownedWindow.Owner = this; ownedWindow.Show(); } 建立所有权后:被拥有的窗口可以通过检查其 Owner 属性的值来引用它的所有者窗口。 所有...
using System.Windows; namespace SDKSample { public partial class App : Application { void App_Startup(object sender, StartupEventArgs e) { // Application is running // Process command line args bool startMinimized = false; for (int i = 0; i != e.Args.Length; ++i) { if (e.Args[...
privatevoidellipse_DragLeave(objectsender, DragEventArgs e){ Ellipse ellipse = senderasEllipse;if(ellipse !=null) { ellipse.Fill = _previousFill; } } 数据放置在拖放目标上方时,发生Drop事件;默认情况下,释放鼠标按钮时,发生此事件。 在Drop事件处理程序中,使用GetData方法从DataObject提取传输的数据,并执行...
using System.Data.Entity; using System.Linq; using System.Windows; namespace WPFwithEFSample { public partial class MainWindow : Window { private ProductContext _context = new ProductContext(); public MainWindow() { InitializeComponent(); } private void Window_Loaded(object sender, RoutedEventArgs...