基础

1. 自定义控件属性

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace BHG.POS
{
    public partial class UserPanel : UserControl, INotifyPropertyChanged
    {
        public event EventHandler PanelClick;
        public event PropertyChangedEventHandler PropertyChanged;

        public UserPanel()
        {
            InitializeComponent();
        }

        protected virtual void OnPanelClick(EventArgs e)
        {
            PanelClick?.Invoke(this, e);
        }
        private Color _buttonColor = Color.Blue; // 默认颜色

        [Category("Appearance")]
        [Description("The color of the button")]
        public Color ButtonColor
        {
            get { return _buttonColor; }
            set
            {
                _buttonColor = value;
                this.BackColor = _buttonColor;
                //OnPropertyChanged(nameof(ButtonColor));
                this.Invalidate(); // 触发重绘
            }
        }
        protected virtual void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}