Explain the postback process as use with web forms, DOT NET Programming

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Question:

(a) Explain the Postback process as use with Web Forms.

(b) Write extract codes to demonstrate how to store and retrieve values in:

(i) a Session Object
(ii) an Application Object.

(c) Multiple Web Form controls can be created in a User Control and can be used several times in different pages in a Web site. However, there is one limitation you cannot access the properties of these controls outside the User Control. Explain fully two ways to solve the above situation. Illustrate your answer using extract codes.

(d) (i) Give one advantage and one disadvantage of the widespread use of cookies.

(ii) Write extract codes that would allow you to:

• check whether a cookie contains a single value or multiple values

• retrieve and display the values of the cookie (if single cookie)

• retrieve and display the key/value pairs of the cookie (if multiple value cookie).


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