Introduction to using application objects in ES0en. NET

Application of the Application object

1. Use Application objects to save information

(1) Use 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 Application object

Application. Set(" key name ", value)

(4) Delete 1 key

Application. Remove(" key name ", value)

(5) Delete all keys

Application.RemoveAll()

Or Application. Clear ()

To summarize the characteristics of Application:

· Physical location of storage: server memory.

· Type limitation of storage: any type.

· Scope of state usage: the entire application.

· Storage size limit: any size.

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

· Security and performance: The data is always stored on the server side, with high security, but it is difficult to store too much data.

· Advantages, disadvantages and precautions: Fast retrieval of data, but lack of self-management mechanism, data will not be released automatically.