Session Management

Session Management No web application is complete without session management – a concept that helps track visitors to our web application. HTTP is a stateless protocol, so the interaction between browsers and web servers is stateless. Each HTTP request a browser sends to a web server is independent of any other request. The stateless nature […]

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Application to Obtain User Information

Application to Obtain User Information Let’s create a panel in our application that will ask the user to enter information such as user id, contact number, and email address. To add a form we need to do two things: Add a panel to our application containing a form with text input fields Add a list […]

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Implementing AJAX

We usually implement AJAX whenever we need to insert or fetch data from the server-side database tables, thus improving performance. Let’s say we want to display detailed book information whose ISBN number has been entered by the user. This data is already stored in the books server-side database table. We’ll need following things to fetch the […]

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Forward Navigation Via Toolbar Buttons

Forward Navigation Via Toolbar Buttons In this example, we will learn to use the toolbar buttons for forward navigation. To understand how it is done, let’s create a small application with six panels: Home, Categories, Subcategories, Select Books, Items in Cart and Checking Out. Let’s assume that the ids assigned to the six panels are home, bookscategories, subcategories, […]

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Creating a Client-Side Database and Tables

Creating a Client-Side Database and Tables In this example, we’ll be using a JavaScript database API for creating  the client-side database. This API provides a simple method of storing, retrieving, and marinating user-supplied information. In addition, it provides a relational database model, and so can easily handle complex data. We can use standard SQL statements […]

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