Learning Asp.net control skills in observer Mode

In fact, the idea of Asp.net controls trigger events is nothing more than the observer mode.

With a series of delegates, an internal observer in Asp.net will execute actions of objects of interest once there is an external action.

For example, when the page automatically generates the button1_onclick method, the observer will also throw the triggered object to the object sender.

Sender, which many beginners are confused about, is actually a trigger object. From the perspective of the observer mode, it will be easy to understand.

The previous section uses the sender in page_load as the (sender as page) to upload

Although the soldiers are not fixed and the water is impermanence, after all, there must be a certain point of return. It is not difficult to grasp the rules.