Introduction to application objects in ASP. NET

Application Object Application

1. Use the Application object to save information

(1) Use the Application object to save information

Application ("key name") = Value

Or Application ("key name", value)

(2) Obtain Application Object Information

Variable name = Application ("key name ")

Or: variable name = Application. Item ("key name ")

Or: variable name = Application. Get ("key name ")

(3) Update the value of the Application Object

Application. Set ("key name", value)

(4) Delete a key

Application. Remove ("key name", value)

(5) delete all keys

Application. RemoveAll ()

Or Application. Clear ()

Summarize the features of the Application:

· Physical storage location: Server Memory.

· Storage type restrictions: any type.

· Scope of status usage: the entire application.

· Storage size limit: any size.

· Life cycle: the application is created at the beginning (precisely the first time the user requests a URL) and destroyed at the end of the application.

· Security and performance: data is always stored on the server, which is highly secure but not easy to store too much data.

· Advantages and disadvantages and precautions: Data retrieval is fast, but data is not automatically released due to a lack of self-management mechanism.