如何在自定义用户控件上创建单击事件?
我已经创建了一个自定义用户控件。 我是否可以添加单击事件,以便当有人单击控件区域中的任何位置时,会触发单击事件?
用户控件定义为:
XAML:
C#:
public partial class TabItem : UserControl { public static readonly DependencyProperty ImageProperty = DependencyProperty.Register("TabItemImage", typeof(string), typeof(TabItem), null); public static readonly DependencyProperty TextProperty = DependencyProperty.Register("TabItemText", typeof(string), typeof(TabItem), null); public string TabItemImage { get { return (string)GetValue(ImageProperty); } set { SetValue(ImageProperty, value); } } public string TabItemText { get { return (string)GetValue(TextProperty); } set { SetValue(TextProperty, value); } } public TabItem() { InitializeComponent(); this.DataContext = this; } }
使用简单:
理想情况下,我可以修改用户控件,以便我可以指定click事件,例如
这可能吗? 如果是这样,我需要做什么才能在自定义用户控件上创建click事件?
sthotakura,有一个好点,这将是一个很好的方式来做到这一点。 但是,如果此UserControl没有多个单击事件,为什么不使用定义自定义UserControl时带来的任何鼠标单击事件。
我不知道你可以将datacontext设置为自己…这很有趣。 我要修改我现在创建的自定义对话框.. :)感谢您教我一些东西。
XAML:
CS:
public partial class TestControl : UserControl { public static readonly DependencyProperty ImageProperty = DependencyProperty.Register("TabItemImage" , typeof(string) , typeof(TabItem) , null); public static readonly DependencyProperty TextProperty = DependencyProperty.Register("TabItemText" , typeof(string) , typeof(TabItem) , null); public string TabItemImage { get { return (string)GetValue(ImageProperty); } set { SetValue(ImageProperty , value); } } public string TabItemText { get { return (string)GetValue(TextProperty); } set { SetValue(TextProperty , value); } } public TestControl() { InitializeComponent(); this.DataContext = this; } // or private void TestControl_OnMouseDoubleClick(object sender, MouseButtonEventArgs e) { // Add logic... } // or private void TestControl_OnMouseLeftButtonDown(object sender, MouseButtonEventArgs e) { // Add logic... } // or private void TestControl_OnMouseLeftButtonUp(object sender, MouseButtonEventArgs e) { // Add logic... } }
您需要将自定义RoutedEvent
添加到TabItem UserControl,下面是添加自定义RoutedEvent的代码:
public static readonly RoutedEvent ClickEvent = EventManager.RegisterRoutedEvent( "Click", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(TabItem)); public event RoutedEventHandler Click { add { AddHandler(ClickEvent, value); } remove { RemoveHandler(ClickEvent, value); } } void RaiseClickEvent() { RoutedEventArgs newEventArgs = new RoutedEventArgs(TabItem.ClickEvent); RaiseEvent(newEventArgs); } void OnClick() { RaiseClickEvent(); }
然后在你的UserControl InitializeMethod连接PreviewMouseLeftButtonUp事件来触发你的自定义RoutedEvent:
PreviewMouseLeftButtonUp += (sender, args) => OnClick();
在MSDN上讨论这个有一个非常好的操作方法,你可能想要阅读它。
所以,我可以在Sthotakura的伟大post上下水道。
这是您的所有命名空间需求的post
using System; using System.Windows; using System.Windows.Controls; namespace YourNameSpace { partial class OPButton { /// /// Create a custom routed event by first registering a RoutedEventID /// This event uses the bubbling routing strategy /// see the web page https://msdn.microsoft.com/EN-US/library/vstudio/ms598898(v=vs.90).aspx /// public static readonly RoutedEvent ClickEvent = EventManager.RegisterRoutedEvent("Click", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(OPButton)); /// /// Provide CLR accessors for the event Click OPButton /// Adds a routed event handler for a specified routed event Click, adding the handler to the handler collection on the current element. /// public event RoutedEventHandler Click { add {AddHandler(ClickEvent, value); } remove { RemoveHandler(ClickEvent, value); } } /// /// This method raises the Click event /// private void RaiseClickEvent() { RoutedEventArgs newEventArgs = new RoutedEventArgs(OPButton.ClickEvent); RaiseEvent(newEventArgs); } /// /// For isPressed purposes we raise the event when the OPButton is clicked /// private void OnClick() { RaiseClickEvent(); } } }
添加以下参考:
Windows; PresentationCore; WindowsBase;