我简单试了一下，好像没有问题
====
using System.Drawing;
using System.Windows.Forms;

namespace WindowsFormsApp1
{
    public partial class ucA : UserControl
    {
        public ucA()
        {
            InitializeComponent();
            this.Paint += UcA_Paint;
        }

        private void UcA_Paint(object sender, PaintEventArgs e)
        {
            e.Graphics.DrawString("this is ucA paint",
                this.Font,
                new SolidBrush(Color.Red),
                new Point(0, 0));
        }
    }

    public class ucB : ucA
    {
        public ucB()
        {
            this.Paint += UcB_Paint;
        }

        private void UcB_Paint(object sender, PaintEventArgs e)
        {
            e.Graphics.DrawString("this is ucB paint",
                this.Font,
                new SolidBrush(Color.Green),
                new Point(0, 20));
        }
    }

    public class ucC : ucB
    {
        public ucC()
        {
            this.Paint += UcC_Paint;
        }

        private void UcC_Paint(object sender, PaintEventArgs e)
        {
            e.Graphics.DrawString("this is ucB paint",
                this.Font,
                new SolidBrush(Color.Blue),
                new Point(0, 40));
        }
    }
}


【 在 moneybox 的大作中提到: 】
: 刚看错你打的字了，实际上，在我目前调试看来，控件被add到panel上，并没有抛出paint事件！


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你试试运行上面的代码可以吗？


【 在 moneybox 的大作中提到: 】
: 好心人，可以帮看看我的代码么，卡在这儿了，心塞
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