Reusing Code with AJAX.NET
By: Joel Martinez on Friday, October 7, 2005
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Asynchronous Javascript using XMLHttpRequest (AJAX) allows your client side code (i.e., Javascript) to make HTTP requests to the server. This opens up many opportunities to develop your software not only faster, but smarter. Code reuse has long been a tenet of Object Oriented programming. With AJAX, you can reuse code that you have written on the server-side which allows you to:
- Have less bugs since you only have to write the code once.
- Provide your users with more complex functionality.
- Access resources otherwise unavailable to your Javascript code
This article will show one such example of code-reuse. We will build a front-end to a fictional Paid Time Off (PTO) system. This system will have server-side code that takes two dates and figures out how many work hours are between the two dates -- taking into account holidays and weekends. We will then incorporate this into a client-side "hours preview" function that allows the employee to see how many work hours their request will span.
ASP.NET code will be written in C# and you will not need a compiler to run the samples.
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