CadParamPluging/PluginEntry.cs

using System.Drawing;
using System.Windows.Forms;
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.Windows;

namespace CadParamPluging
{
    public class PluginEntry : IExtensionApplication
    {
        private static PaletteSet _palette;

        public void Initialize()
        {
            ShowPalette();
        }

        public void Terminate()
        {
            // 可在此释放资源或记录日志
        }

        private void ShowPalette()
        {
            if (_palette == null)
            {
                _palette = new PaletteSet("参数化出图")
                {
                    Style = PaletteSetStyles.ShowCloseButton |
                            PaletteSetStyles.ShowAutoHideButton |
                            PaletteSetStyles.Snappable
                };

                var placeholder = new Label
                {
                    Text = "Param panel placeholder",
                    Dock = DockStyle.Fill,
                    TextAlign = ContentAlignment.MiddleCenter
                };

                _palette.Add("Main", placeholder);
                _palette.MinimumSize = new Size(240, 200);
            }

            _palette.Visible = true;
        }

        [CommandMethod("PARAM_PANEL")]
        public void ShowPanelCommand()
        {
            ShowPalette();
        }
    }
}