raise an event

• Control is configured to populate on demand , the control raises an event when a user expands the node
  控件配置为即需填充时，该控件将在用户展开节点时引发事件。
• The following example returns a value by raising an event from a procedure running on a separate thread
  下面的示例通过从运行于单独线程的某过程引发一个事件来返回值：
• 5 , then asp . net will not raise an event to the provider until the fifth instance of the event occurs
  ，则asp . net在事件的第五个实例出现前，不会将该事件引发到提供程序。
• Carries out the actions associated with one of the zone verbs , or raises an event that posts back to the server
  执行与某一区域谓词关联的操作，或引发发布回服务器的事件。
• The class that raises an event is the event source , and the methods that process the event are the event handlers
  引发事件的类是事件源，而处理事件的方法是事件处理程序。
• A class that implements this interface is a type that raises an event when any of its property values change
  实现此接口的类是一个在其任何属性值更改时都会引发事件的类型。
• Do not pass null nothing in visual basic as the event data parameter when raising an event
  当引发事件时，不要将null （在visual basic中为nothing ）作为事件数据参数进行传递。
• Do use a parameter that is typed as the event argument class to the protected method that raises an event
  使用一个参数，该参数已类型化为引发事件的受保护方法的事件参数类。
• 5 means that asp . net will not raise an event to the provider until the fifth instance of the event occurs
  意味着asp . net在事件的第五个实例出现前，不会将该事件引发到提供程序。
• Component that raises an event every five seconds and displays a message box that alerts you to the event
  组件，该组件每5秒钟引发一个事件并显示一个对该事件提出警告的消息框：