Revit二次开发添加按钮

整体结构布局 

命令类 

namespace HW
{
    [Transaction(TransactionMode.Manual)]
    class Cmd : IExternalCommand
    {
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            TaskDialog.Show("Revit","Hello,World");
            return Result.Succeeded;
        }
    }
}

界面制作类 

namespace HW
{
    [Transaction(TransactionMode.Manual)]
    public class App : IExternalApplication
    {
        public Result OnShutdown(UIControlledApplication application)
        {
            return Result.Succeeded;
        }
        public Result OnStartup(UIControlledApplication application)
        {
            //添加Ribbon，pushbutton
            PushButton pushButton = application.CreateRibbonPanel("Ribbon名").AddItem(new PushButtonData("内部名", "Button名", Assembly.GetExecutingAssembly().Location, "HW.Cmd")) as PushButton;
            //指定图片方式一 图片生成操作要改为Resource
            pushButton.LargeImage = new BitmapImage(new Uri("pack://application:,,,/HW;component/Resources/para.png"));
            //指定图片方式二
            pushButton.LargeImage = new BitmapImage(new Uri(Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "para.png")));
            return Result.Succeeded;
        }
    }
}