control life
1。Instantiate
2。Initialize
3。Begin Tracking View State
4。Load View State (postback only)
5。Load Postback Data (postback only)
6。Load
7。Raise Changed Events (postback only, optional)
8。Raise Postback Events (postback only, optional)
9。PreRender
10。SaveViewState
11。Render
12。Unload
2。Initialize
3。Begin Tracking View State
4。Load View State (postback only)
5。Load Postback Data (postback only)
6。Load
7。Raise Changed Events (postback only, optional)
8。Raise Postback Events (postback only, optional)
9。PreRender
10。SaveViewState
11。Render
12。Unload
13。Dispose