如何为 MouseDown 事件添加事件处理程序?

How to add event handler for MouseDown event?

当我按照 Microsoft 网页上的文档操作时,添加事件处理程序单击事件非常简单。不幸的是,没有包含 MouseDown 事件的示例。

我已经尝试了很多组合,但我一定是使用了错误的语法或错误的声明。

这很好用:

    notifyIcon.Click += new System.EventHandler(NotifyIcon_Click);
    System.Windows.Forms.ContextMenu contextMenu = new System.Windows.Forms.ContextMenu();
    System.Windows.Forms.MenuItem menuItemExit = new System.Windows.Forms.MenuItem();
    
    contextMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] { menuItemExit });

    menuItemExit.Index = 0;
    menuItemExit.Text = "E&xit";
    menuItemExit.Click += new System.EventHandler(menuItemExit_Click);
    notifyIcon.ContextMenu = contextMenu;
}

private void NotifyIcon_Click(object Sender, EventArgs e)
{
    this.Visibility = Visibility.Visible;
    this.Activate();
}

但这不是:

notifyIcon.MouseDown += new System.EventHandler(NotifyIcon_MouseDown);
    
    System.Windows.Forms.ContextMenu contextMenu = new 
    System.Windows.Forms.ContextMenu();

    System.Windows.Forms.MenuItem menuItemExit = new 
    System.Windows.Forms.MenuItem();
    
contextMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[]{menuItemExit});

    menuItemExit.Index = 0;
    menuItemExit.Text = "E&xit";
    menuItemExit.Click += new System.EventHandler(menuItemExit_Click);
    notifyIcon.ContextMenu = contextMenu;
}

private void NotifyIcon_MouseDown(object Sender, EventArgs e)
{
    this.Visibility = Visibility.Visible;
    this.Activate();
}

我在这里想要实现的是右键单击打开上下文菜单,左键单击通知图标打开应用程序本身。我希望在 MouseDown 事件中能够检测到鼠标左键或右键是否按下。

我建议您在 page_load 事件中添加事件以触发其 ASP.Net 网络应用程序。

protected void Page_Load(object sender, EventArgs e) { }.

根据您添加的方式,该事件看起来是正确的。

如果这是表单应用程序,那么您需要在构造函数中处理它,语法如下:

this.nitifyIcon.MouseDown += 新 System.Windows.Forms.MouseEventHandler(this.notifyIcon_MouseDown);

我看到我已经收到了一些回复。在等待的过程中,我突然发现了解决我一直面临的问题的方法。

来源:Invoke NotifyIcon's Context Menu

   private void SetNotifyIconSettings()
            {
    
                notifyIcon.Text = "My Application";
                notifyIcon.Icon = new System.Drawing.Icon("now-agent-icon.ico");
                notifyIcon.MouseDown += new System.Windows.Forms.MouseEventHandler(NotifyIcon_MouseDown) ;
                
                System.Windows.Forms.MenuItem menuItemExit = new System.Windows.Forms.MenuItem();
               
                contextMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] { menuItemExit });
                menuItemExit.Index = 0;
                menuItemExit.Text = "E&xit";
                menuItemExit.Click += new System.EventHandler(menuItemExit_Click);
                notifyIcon.ContextMenu = contextMenu;
    
            }
    
            private void NotifyIcon_MouseDown(object Sender, System.Windows.Forms.MouseEventArgs e)
            {
                if(e.Button == System.Windows.Forms.MouseButtons.Left)
                {
                    this.Visibility = Visibility.Visible;
                    this.Activate();
                }
    
                if(e.Button == System.Windows.Forms.MouseButtons.Right)
                {
                    MethodInfo mi = typeof(System.Windows.Forms.NotifyIcon).GetMethod("ShowContextMenu", BindingFlags.Instance | BindingFlags.NonPublic);
                    mi.Invoke(notifyIcon, null);
    
                }
    
            }
            private void menuItemExit_Click(object Sender, EventArgs e)
            {
                
                CloseApplication();
            }