04 February 2009 22:29
It was bound to happen - you knock up an article on jQuery draggables one day, and the next, someone like Jim ;-) comes along and asks about persisting the position of the dragged item across Postbacks, or even sessions. I suppose it's my fault - I mentioned using draggables in a previous life in the context of saving the position, so it's only fair I share how that's done.
01 February 2009 08:12
One of the keystones of modern AJAX-enabled web sites is Drag and Drop. This article looks at the current state of Draggables that form part of the jQuery UI Library.
24 January 2009 18:18
It's a common problem: you have a registration form, but you want to prevent user names or other values from being used more than once. You need a user-friendly way to prevent duplicate values being submitted. This is where the simplicity of jQuery excels.
17 January 2009 23:13
My simple article on Ajax with Classic ASP is one of the most popular on this site. So I thought it's about time I updated it to show how to use jQuery to Ajaxify a Classic ASP page. Since I did that, the jQuery version became even more popular but needed to be brought up to date. This latest version uses a couple of suggestions that have been provided by commentors to improve the code. I have also added a download which contains all the code needed to run the samples.
13 January 2009 08:47
Cascading DropDownLists or dependent dropdowns are the signature dish for AJAX applications. I spent quite a while fiddling to try to get some to work, before stumbling across a life-saving jQuery plugin that makes working with DropDownLists on the client-side a breeze. This article shows how it all works, and makes use of the WebService I introduced in my previous jQuery article.
10 January 2009 09:09
There appear to be many articles showing how to use jQuery with ASP.NET Web Services around, but the vast majority of them illustrate the use of PageMethods that return a single value - typically "Hello World!" or the current date and time. Not much use in the real world, where you may more often need to call a service that returns a collection of complex objects. Here are a couple of examples that look at playing with more than just simple values.
05 January 2009 13:54
31 December 2008 09:32
Over Christmas, I had a bit of spare time, so I decided to add some functionality to this site. One of the things that I added was the ability for people to post comments about specific articles, and you will see that a form has been added at the end of this article. The other thing I have been meaning to get round to is to add a Google Site Map. I believe I have created my site to be as friendly to Google's bots as possible, but there is no harm in submitting a site map to guarantee that Google knows about all the pages I want indexed.
25 December 2008 14:18
13 December 2008 21:47
Getting odd results and unexpected errors when working with Dates and Times in Access through ASP.NET is a common problem. Here's an overview of the Access DateTime data type, and some resolutions to the more frequently encountered errors.
07 December 2008 19:33
Delegates in C# cause a fair amount of confusion, but with the introduction of LINQ to SQL and the profilic use of the Lambda Expression operator (=>) that it has foisted on an unprepared batch of beginners, an understanding of how these two items are related, together with Anonymous Methods becomes more important. Most definitions of Delegates that you find start off with comparing them to "function pointers in C or C++", which is great if you ever worked with those languages and understood them, but not helpful to new programmers. Here's my attempt at simplifying the various concepts.
28 November 2008 13:38
Many times, I have seen questions about where to obtain Charting controls for ASP.NET web applications, and until recently, the answer has always been to have a look at many of the third party offers that are available from the leading control development companies. That is until Microsoft released their Chart Controls for both Windows Forms and ASP.NET to work with .Net 3.5 SP1.
24 November 2008 07:41
I have now covered many of the basics involved in generating PDF files from ASP.NET using iTextSharp in the series of articles listed below. This article will look at additional ways to provide formatting to documents through the use of columns.
17 November 2008 12:30
The previous iTextSharp article looked at bringing images into a PDF file and working with them. Sometimes, however, you may want to draw shapes and lines within the PDF and not rely on images. iTextSharp includes a lot of functionality that covers simple drawing to quite complex shapes. This article gets you started. Previous articles are listed below:
07 November 2008 23:00
The seventh article in my iTextSharp series looks at working with images. This article builds on the previous six which are listed below.