calendar_today 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.
calendar_today 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.
calendar_today 05 January 2009 13:54
calendar_today 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.
calendar_today 25 December 2008 14:18
calendar_today 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.
calendar_today 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.
calendar_today 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.
calendar_today 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.
calendar_today 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:
calendar_today 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.
calendar_today 03 November 2008 07:34
Tables will probably be one of the most used elements in PDFs generated from ASP.NET applications to provide the structure for documents such as orders and invoices. This overview is not an exhaustive examination of tables, but provides an introduction to working with them through iTextSharp, and builds on the previous articles in this iTextSharp series:
calendar_today 26 October 2008 11:01
Over the years, I have picked up and read many Beginners books that attempt to get someone started on the road to building web sites with ASP.NET. Nearly all of them assumed that their readers know more than they might. Some of them seem to assume that all readers are upgrading from one version of the .NET framework to another, while others assume that you already know about core web development technologies such as HTML, CSS, C# or VB etc. I well remember being frustrated with my first book, in that it didn't give me enough basic information to get started with web development, let alone web development with ASP.NET. Now, up steps Imar Spaanjaars, with his effort: Beginning ASP.NET 3.5 in C# and VB (Wiley/Wrox, ISBN: 978-0-470-18759-3).
calendar_today 23 October 2008 21:51
Interactivity within PDF documents is enabled though Anchors (links) and Bookmarks. Following earlier articles in my iTextSharp series, this particular contribution will introduce the basics of linking and bookmarking PDF documents created via iTextSharp. You may want to review earlier articles in this series, if you haven't already done so.
calendar_today 20 October 2008 08:32
Having already looked at how to create a PDF document with iTextSharp, set fonts and their styles and add text, this article turns its attention to lists. Ordered and unordered lists will be covered. You may want to review earlier articles in this series, if you haven't already done so.
calendar_today 18 October 2008 22:32
This is the third in a series of articles that looks at using the open source component, iTextSharp from within ASP.NET to generate PDFs. Just as HTML and ASP.NET provide containers for varying ampounts of textual content, iTextSharp offers the Chunk, Phrase and Paragraph classes. Before going on, if you would like to read earlier articles, they are:
calendar_today 15 October 2008 22:07
Following on from my introduction to iTextSharp, the free PDF utility that lets you work with PDF files within ASP.NET, this article looks at working with fonts in PDF documents that you create. If you haven't read the first article in this series, I recommend that you do so now.
calendar_today 12 October 2008 11:26
The .NET framework does not contain any native way to work with PDF files. So, if you want to generate or work with PDF files as part of your ASP.NET web application, you will have to rely on one of the many third party components that are available. Google will help you to find one that fits your budget, as well as a range of open-source free components. One of the free components is iTextSharp, which is a port of a well known Java utility, iText.
calendar_today 09 July 2008 09:19
Building on my previous article on importing text files of various formats to an Access database, here's how to do the same thing simply and efficiently with Excel files.
calendar_today 17 May 2008 09:48
There are a variety of options for connecting to Access databases within ASP.NET pages. This article attempts to cover the choices and offer recommendations for getting the best out of Access.