Registers beginning and ending event handler delegates for an asynchronous page.

为非同步页面，注册开始与结束事件处理常式委派。

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Registers beginning and ending event handler delegates that do not require state information for an asynchronous page.

为非同步页面，注册不需要状态资讯的开始与结束事件处理常式委派。

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The binding mechanism used with delegates is dynamic: a delegate can be bound at run time to any method whose signature matches that of the event handler.

使用委托的绑定机制是动态的：委托可在运行时绑定到签名与事件处理程序的签名相匹配的任何方法上。

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