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...
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...
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">...
In Part I of this series, we started the process of creating user polls for a business web site. Part I gave the layout of the data layer and began the construction of the class file. In this part we will continue with adding methods to the class file that will enable the administrator to set the variable values and read from the database tables. The setPollId($iPollId) method sets the value for the _iPollId variable. Since the constructor method calls the setPollId($iPollId) method, we must...
At this point, only those living under a rock for the past couple of months are unaware that Google has taken on JavaScript with its latest project, the Dart programming language. Dart, originally named Dash, was started to “fix” the problems of JavaScript’s “fundamental flaws that cannot be fixed merely by evolving the language” by meeting the following goals: Create a structured yet flexible language for web programming. Make Dart feel familiar and natural to programmers and thus easy...
User surveys can be an extremely effective marketing tool for any business web site. Visitors can make their voices heard on what products, services and information they would like the site to provide. Site owners can then adjust their marketing plans and promotions around the results of these polls. In order to build a basic user poll, we must first create the database tables that will hold the poll question and its various responses. Create the MySQL Polls Table ... First, we must build a database table...
You’re may be wondering what exactly CRUD is. CRUD simply stands for Create, Read, Update and Delete and it is the one of the fundamental principles of programming logic that can be expanded and applied to larger projects. For example, let’s imagine we’re creating a social network and we like to have the ability for users to create accounts, edit and update information for those accounts and also delete said accounts; that is CRUD at work. Now let’s get started using PHP & MySQL, to...
When you are stuck waiting in line or for an appointment your iPad can your saving grace. Not just to check your Google+ account or play a quick game of Trailer Park Zombies, but to get actual work done. That is if you have the right apps. Listed below are some of the best apps for web developers. And this list isn’t one that only contains a few time management and task list apps. You might actually be surprised at how much you can get done with your iPad. iMockups ... Quickly and easily create wireframes for...