Here’s the situation: You’ve written a program in C#. You’ve checked the flowcharts, examined your coding and developed your user interface. You’re anticipating that everything will flow as smooth as silk. You’re ready to create a build of the program and, instead of seeing a beautiful, efficient result, you get several (often incomprehensible) error message. How did this happen? Here are SOME ways that these errors occur: #1 Undeclared Variables ... C# throws an error message on undeclared...
Responsive web design is widely thought of as a design trend, but it’s much more than that. It is an approach to web development that allows a website to break itself down smoothly across multiple monitor sizes, screen resolutions, and platforms, be it a computer, tablet or mobile device. It allows the developer to create a site that is optimized for each platform, both in navigation, readability and load time. In this tutorial, we take a look at what responsive web design entails for the developer....
The XREF, or cross reference table, is a database table that links records together. These tables are very good for normalization in your database. I almost always use an xref when I need an many to many relationship. Usually XREF tables have only two columns with no Primary Key. That's right, the two columns together make them unique. They are both Foreign Keys to other tables. A real life example of this would be in any standard CRM. Let's go over this example right now. Many CRM's could have a table to store...
The new HTML5 Markup Language has introduced several new element features not available in HTML4, for example elements like header, section, nav, footer, aside, and article. Where these new tags will work in Opera, Safari, Chrome or Firefox they will not function in Internet Explorer (version 8 and earlier). The problem is that due to the way parsing works in IE, these elements are not recognized properly. This tutorial explains how to get HTML5 tags to work in IE8 and its earlier releases. It is possible...
Last week we discussed how important navigation is to a website and how developing an interactive navigation system will help give a clean, minimalist website a bit of character and make it feel modern and current. It’s too easy to make a clean website look dated and as though it were developed in the 90’s, so by injecting modern user interfacing techniques that are popular today you’re able to put the viewer at ease and reassure them that the content is fresh and up to date. We’ll pick up where...
In the last piece on our PHP online user poll, we look at the administrative service and how the site supervisor enters, deletes and manages the poll data. The first poll administrative page checks if the administrator is logged in. You can choose from Session variables or Cookies to check the site administrator login status. Once the application has confirmed the identity of the site administrator, the page lists the available polls. The first step is to use the class methods and variables in the class.polls.php...
Web applications remain the largest security risk for any company. The reason is two-fold. First, most software services have moved to a web based environment giving malicious hackers a much larger landscape to attack. Second, most organizations put a majority of their resources, i.e. dollars and manpower, into network and perimeter security leaving the web unguarded. In most cases, it is up to the web developer to secure sites as best they can. Those who know how to patch known vulnerabilities in...
So far in this series, we have developed the data layer (database tables) and the business layer (PHP methods) for manipulating the data. In this piece, we will look at the presentation layer that is used to display the poll question and poll results. The HTML header will check for the presence of a cookie (in case the user has voted previously) and refresh the page if it has timed out. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">...