C＃TabPage继承

Question

我有两节课。第一类有TabPage控件。我想在Child类（B类）中更改TabPage的布局。例如，如何在Child类中向tabPage控件添加简单按钮？

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

Answer 1

将TabPage更改为公开

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

    }

Answer 2

首先，您需要将A类中的TabPage设置为公共，然后在TabPage控件集合中添加要添加的控件;在这个例子中，我已经为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，如果您想要从基类访问TabPage，请将其公开，否则受到保护。

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;
}