After the request has been processed, the instance of the page class is discarded and with it the entire control tree. This is a source of confusion among novice ASP.NET programmers who rely on class instance members that are lost with every page request/response cycle.
[edit] State management
ASP.NET applications are hosted by a Web server and are accessed using the stateless HTTP protocol. As such, if an application uses stateful interaction, it has to implement state management on its own. ASP.NET provides various functions for state management. Conceptually, Microsoft treats "state" as GUI state. Problems may arise if an application needs to keep track of "data state"; for example, a finite-state machine which may be in a transient state between requests (lazy evaluation) or which takes a long time to initialize. State management in ASP.NET pages with authentication can make Web scraping difficult or impossible.
[edit] Application
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Shortcomings and inadequacies of China's panorama is the inevitable development. Caused by the panorama in the design deficiencies and weaknesses of the reasons are many, but similar subject matter content is the main reason. Subject to a number of objective constraints and impact on the time of creation of paintings, such as some memorial panorama must be completed within a limited time, creative unit can only be in a hurry, grab the progress and impact the quality of the panorama of the art. Creation time for us, the effect will be better.
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