WinForms选项卡页事件未触发 [英] winforms tab page event not firing

问题描述

我有一个TabControl，用户可以在其中添加标签页.

I have a TabControl to which the user can add tab pages.

我正在尝试附加一些事件，例如:MouseEnter，MouseLeave，MouseClick，但是这些事件似乎根本没有触发，只有在将它们附加到本身，但这不是我所需要的.

I am trying to attach some events to it such as: MouseEnter, MouseLeave, MouseClick, But it seems the these events are not firing at all, they only fire when I attach them to the TabControl itself, but this is not what I need.

将事件附加到标签控件标签页有什么问题?

What is the problem with attaching events to a tab control tab page ?

这是我最近一次尝试从我的代码中附加这些事件的方法:

Here is my latest attempt to attach these event from my code:

private void customerTabCtrl_ControlAdded(object sender, ControlEventArgs e)
{
   TCTabPage tctab = (TCTabPage)e.Control; // Option A
   TCTabPage tctab = (TCTabPage)customerTabCtrl.Controls[customerTabCtrl.Controls.Count - 1]; //Option B
   tctab.MouseEnter += new EventHandler(tctab_MouseEnter);
   tctab.MouseLeave += new EventHandler(tctab_MouseLeave);
}

推荐答案

您不需要为此事件，因为默认情况下，最终用户无法在没有提供代码的情况下将TabPages添加到TabControl.

You don't need an event for this since by default, the end user cannot add TabPages to the TabControl without you providing the code for it.

因此，无论您在何处添加TabPage，都应在这些事件之间进行接线:

So wherever you are adding the TabPage, that's when you should wiring up those events:

TCTabPage tctab = new TCTabPage();
tbtab.Text = "New Tab";
tctab.MouseEnter += tctab_MouseEnter;
tctab.MouseLeave += tctab_MouseLeave;
customerTabCtrl.TabPages.Add(tctab);

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