C# TabPage 继承

Question

我有两节课。第一类有 TabPage 控件。我想更改子类（B 类）中 TabPage 的布局。比如如何在 Child 类的 tabPage 控件中添加简单的按钮？

Class A
{
   TabPage a;
}
Class B : Class A
{
}

Answer 1

将 TabPage 更改为公共

    class A
    {
        public TabPage a;
    } 
    class B : A
    {

    }

Answer 2

首先你需要让A类中的TabPage是公开的，然后在你的TabPage控件集合中添加你想要添加的控件；在此示例中，我向TabPage 添加了一个按钮，您可以类似地添加更多控件。

class A
{
    public TabPage a;
} 
class B : A
{
        //Create a control to add and set its properties
        Button btn = new Button();
        btn.Location = new Point(20, 20);
        btn.Size = new Size(120, 25);
        btn.Text = "My new Button";
        //Add the control to the Tabpage.
        a.Controls.Add(btn);
}

这实际上取决于您的情况，如果您也希望从基类访问 TabPage，请将其设为 public 否则受保护。

受保护

class A
{
    //Visible only to Inheriting class;
    protected TabPage a;
} 
class B : A
{
        //Create a control to add and set its properties
        Button btn = new Button();
        btn.Location = new Point(20, 20);
        btn.Size = new Size(120, 25);
        btn.Text = "My new Button";
        //Add the control to the Tabpage.
        a.Controls.Add(btn);
        //This will be visible to everybody
        public TabPage b= a;
}