DOT NET Interview Questions - DotNetSpider

7. ASP.NET
(B) What’s the sequence in which ASP.NET events are
processed ?
Following is the sequence in which the events occur :-
√
√
√
√
Page_Init.
Page_Load.
Control events
Page_Unload event.
Page_init event only occurs when first time the page is started , but Page_Load occurs in
subsequent request of the page.
(B) In which event are the controls fully loaded ?
Page_load event guarantees that all controls are fully loaded.Controls are also accessed in
Page_Init events but you will see that viewstate is not fully loaded during this event.
(B) How can we identify that the Page is PostBack ?
Page object has a “IsPostBack” property which can be checked to know that is the page
posted back.
(B) How does ASP.NET maintain state in between
subsequent request ?
Refer caching chapter.
(A) What is event bubbling ?
Server controls like Datagrid , DataList , Repeater can have other child controls inside
them.Example DataGrid can have combo box inside datagrid.These child control do not
raise there events by themselves , rather they pass the event to the container parent
(which can be a datagrid , datalist , repeater) , which passed to the page as “ItemCommand”
event.As the child control send there events to parent this is termed as event bubbling.
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