控件是对数据和方法的封装。控件可以有自己的属性和方法。属性是控件数据的简单访问者。方法则是控件的一些简单而可见的功能。 -Control is the encapsulation of data and methods. Control can have their own attributes and methods. Property is a simple visitor control data. Method is simple and can be seen some of th