Johan de Koning

Last week I bought a nice gadget at our discount supermarket (Aldi). The gadget is called a Digital notepad and makes it possible to record your notes while writing them down on paper. Your writing is stored on the internal memory as vector data. There is a lot of software supplied, but using them is [...]

With Openfire installed (http://www.johandekoning.nl/index.php/2009/11/30/xmpp-and-wcf-net-installation-of-openfire/) it is time to create some users and connect with a XMPP client to the server.
User management
Because of the simple installation, users created on the Openfire server are stored inside the embedded database. To add new users, make sure that the server runs and open the administration console (default address http://localhost:9090). [...]

In my previous blogpost, I talked about my goal to make an XMPP implementation within .Net based on Windows Communication Foundation. Before I can start, I had to find out how a normal XMPP stream would be send/retrieved between client and server.
In this blogitem, I will explain the steps I took to install the OpenFire [...]

Hummm… XMPP and WCF? Is this not a blog page about Android or other Google related stuff. That’s partly true but as a Microsoft .Net developer I am more interested in combining the best of both world. I like Google and Microsoft products. I really like the open source vision of Google. But when it comes [...]

Today I released the first version of the WBXML .Net 1.0 library. With this library you can encode and decode WBXML messages.
More information can be found at http://wbxml.codeplex.com

Synchronisation of data between multiple devices is important to have information at every place at every time. For example, I want to have my work agenda items on my mobile phone so that I have a quick overview (and get a notification) when I have a meeting.Â
There are different protocols for data synchronization. To synchronize [...]

With .Net Compact Framework I developed an application that is doing a webrequest on interval bases. With the webrequest I sent data by providing some arguments inside the querystring. I am not interested in the response and therefore I did not assign the GetResponse() return value. I use the following code:

<br />
HttpWebRequest webRequest;</p>
<p>try<br />
{<br />
[...]

In September I will go on holiday to the United States for 3 weeks. It would be nice to send updates to family and friends by placing images on Picasa. These web images will be taken with the photocamera from my mobile (which is Windows Mobile 6 based). I will upload the pictures when a [...]

While LINQ to XSD is still in alpha, it is always a good idea to look at the (new) possibilities of this new technology. Before LINQ to XSD I used the XSD.exe to generate source files based on a XML schema. By generating this code you can work with XML files on a typed safe [...]

Last year I started working on the Aincha Web Framework. This ASP.Net framework should make it possible to create websites with the use of widgets as building blocks. The configuration of the website is done by the use of XML.

With the use of XML configuration files, different page types can be defined which will be [...]