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Articles by Joel Ivory Johnson (Articles: 24, Technical Blogs: 40)

Articles: 24, Technical Blogs: 40

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Average article rating: 4.82

iPhone
General
Posted: 12 Jul 2010   Updated: 19 Jul 2010   Views: 122,975   Rating: 4.90/5    Votes: 38   Popularity: 7.73
Licence: The Code Project Open License (CPOL)      Bookmarked: 92   Downloaded: 2,144
The first part of an introduction to the iOS graphics APIs. In this article, I look at some of the Quartz 2D / Core Graphics APIs.
Posted: 21 Jun 2010   Updated: 19 Jul 2010   Views: 376,929   Rating: 4.91/5    Votes: 148   Popularity: 10.66
Licence: The Code Project Open License (CPOL)      Bookmarked: 299   Downloaded: 2,337
This is a first in a series of articles to get some one up and running with iPhone development. This first article is to help you identify what hardware you need for development, and gives a quick introduction to Objective-C.
Posted: 9 May 2011   Updated: 9 May 2011   Views: 20,037   Rating: 4.43/5    Votes: 4   Popularity: 2.67
Licence: The Code Project Open License (CPOL)      Bookmarked: 13   Downloaded: 0
Code Project Virtual Tech Summit Session: An introduction to iPhone development including setting up environment, an introduction to the Objective-C programming language, creating your first application, data persistence, using the accelerometer, and an introduction to the graphics APIs.
Mobile Development
Games
Posted: 27 Jan 2013   Updated: 27 Jan 2013   Views: 21,526   Rating: 4.96/5    Votes: 19   Popularity: 6.34
Licence: The Code Project Open License (CPOL)      Bookmarked: 23   Downloaded: 105
An introduction to the process of deploying code to a PlayStation® Vita
Windows Phone 7/8
Applications
Posted: 30 Mar 2011   Updated: 30 Mar 2011   Views: 47,021   Rating: 4.91/5    Votes: 21   Popularity: 6.50
Licence: The Code Project Open License (CPOL)      Bookmarked: 39   Downloaded: 4,277
Demonstration of what needs to be done to make a voice recorder on Windows Phone 7 including converting the raw bytes from the recording into a WAVE file.
General
Posted: 14 Sep 2012   Updated: 25 Jul 2013   Views: 9,997   Rating: 4.67/5    Votes: 4   Popularity: 2.77
Licence: The Code Project Open License (CPOL)      Bookmarked: 12   Downloaded: 236
A sidereal time calculator for Windows Phone
Windows CE
Posted: 15 Nov 2008   Updated: 15 Nov 2008   Views: 46,398   Rating: 4.81/5    Votes: 16   Popularity: 5.79
Licence: The Code Project Open License (CPOL)      Bookmarked: 38   Downloaded: 736
Wrapper demonstrating the use of native message queues within managed code.
Windows Mobile
Posted: 5 Aug 2007   Updated: 5 Aug 2007   Views: 38,941   Rating: 4.64/5    Votes: 8   Popularity: 4.19
Licence: The Code Project Open License (CPOL)      Bookmarked: 32   Downloaded: 1,379
Implementation of a Telnet client for Windows Mobile 5 devices.
Posted: 15 Aug 2007   Updated: 15 Aug 2007   Views: 181,107   Rating: 4.81/5    Votes: 20   Popularity: 6.26
Licence: The Code Project Open License (CPOL)      Bookmarked: 144   Downloaded: 4,760
Use a Windows Mobile Professional phone with a GPS receiver to create a simple SMS based location tracking program.
Posted: 5 May 2007   Updated: 18 Aug 2007   Views: 32,116   Rating: 4.80/5    Votes: 6   Popularity: 3.74
Licence: The Code Project Open License (CPOL)      Bookmarked: 29   Downloaded: 695
An article on using the Microsoft Live Search API to make a location aware phone book
Posted: 18 Jul 2008   Updated: 31 Jul 2008   Views: 120,181   Rating: 4.93/5    Votes: 25   Popularity: 6.90
Licence: The Code Project Open License (CPOL)      Bookmarked: 129   Downloaded: 1,558
An article discussing the various methods that you can use to automatically start an application on Windows Mobile, either by schedule or in reaction to a system event.
Posted: 3 Nov 2008   Updated: 3 Nov 2008   Views: 21,657   Rating: 4.07/5    Votes: 8   Popularity: 3.67
Licence: The Code Project Open License (CPOL)      Bookmarked: 41   Downloaded: 197
An article introducting the native synchronization objects suppied by Windows Mobile and explanation of how to use them.
Posted: 4 Dec 2008   Updated: 4 Dec 2008   Views: 34,969   Rating: 4.91/5    Votes: 14   Popularity: 5.63
Licence: The Code Project Open License (CPOL)      Bookmarked: 62   Downloaded: 756
Program for displaying CallerID information on computer and muting computer sounds while on phone.
Posted: 17 Dec 2008   Updated: 8 Jan 2009   Views: 195,017   Rating: 4.90/5    Votes: 49   Popularity: 8.28
Licence: The Code Project Open License (CPOL)      Bookmarked: 116   Downloaded: 896
A guide to get a Windows Mobile Professional dev environment up and running for those who cannot acquire Visual Studio.
Posted: 6 Jan 2009   Updated: 20 Jan 2009   Views: 48,322   Rating: 4.95/5    Votes: 14   Popularity: 5.67
Licence: The Code Project Open License (CPOL)      Bookmarked: 56   Downloaded: 1,203
Wrapper and sample programs demonstrating the use of the Skyhook Wireless XPS SDK (hybrid position system using GPS, WiFi Positioning, and Celltower positioning)
Posted: 27 Aug 2008   Updated: 22 Mar 2009   Views: 228,881   Rating: 4.93/5    Votes: 83   Popularity: 9.45
Licence: The Code Project Open License (CPOL)      Bookmarked: 156   Downloaded: 3,434
Collection of information on interacting with the power manager to take advantage of or disable power saving features in Windows Mobile devices.
Posted: 29 Jul 2009   Updated: 29 Jul 2009   Views: 46,994   Rating: 4.93/5    Votes: 25   Popularity: 6.89
Licence: The Code Project Open License (CPOL)      Bookmarked: 51   Downloaded: 2,085
Recreated an old game as a simple demonstration of DirectDraw.
Posted: 21 Mar 2010   Updated: 22 Mar 2010   Views: 11,695   Rating: 4.89/5    Votes: 12   Popularity: 5.28
Licence: The Code Project Open License (CPOL)      Bookmarked: 14   Downloaded: 135
My experience with the Windows Marketplace for Mobile for 6.x devices and the certification process.
DirectX
General
Posted: 11 Nov 2012   Updated: 11 Nov 2012   Views: 17,309   Rating: 5.00/5    Votes: 4   Popularity: 3.01
Licence: The Code Project Open License (CPOL)      Bookmarked: 12   Downloaded: 1,654
Using the XInput library to interface with the Xbox 360 controller.
Windows Presentation Foundation
Data Binding
Posted: 3 Sep 2008   Updated: 3 Sep 2008   Views: 257,126   Rating: 4.89/5    Votes: 114   Popularity: 10.05
Licence: The Code Project Open License (CPOL)      Bookmarked: 211   Downloaded: 7,011
An introduction to data binding with WPF.
Game Development
XNA
Posted: 25 Sep 2009   Updated: 25 Sep 2009   Views: 66,855   Rating: 4.99/5    Votes: 57   Popularity: 8.76
Licence: The Code Project Open License (CPOL)      Bookmarked: 39   Downloaded: 475
A level program written for the Zune using the XNA framework.
Posted: 10 Jul 2011   Updated: 10 Jul 2011   Views: 23,324   Rating: 4.78/5    Votes: 8   Popularity: 4.35
Licence: The Code Project Open License (CPOL)      Bookmarked: 19   Downloaded: 1,383
A proof of concept for an animated sprite component that I am developing to run in XNA projects on Windows Phone, PC, and Xbox. The component allows animation information to be a part of the project's content and is a step in the direction of allowing an artist to be completely over creating animati
Posted: 2 Jan 2007   Updated: 11 Nov 2012   Views: 107,182   Rating: 4.73/5    Votes: 15   Popularity: 5.55
Licence: The Code Project Open License (CPOL)      Bookmarked: 30   Downloaded: 3,552
This article demonstrates how to use the Microsoft XNA Framework to read the state of an Xbox 360 controller
Arduino
General
Posted: 12 Feb 2014   Updated: 12 Feb 2014   Views: 19,261   Rating: 4.99/5    Votes: 47   Popularity: 8.34
Licence: The Code Project Open License (CPOL)      Bookmarked: 47   Downloaded: 416
A walk through on modifying an RC car to be controlled by a Windows Phone

Average blogs rating: 4.69

Dialogs and Windows
Windows 2000 Styles
Posted: 8 Feb 2010   Updated: 8 Feb 2010   Views: 5,633   Rating: 4.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 1   Downloaded: 0
This question has come up three times in the various forums in which I participate, so I thought it would be appropriate for me to write a post about it.
Posted: 8 Feb 2010   Updated: 8 Feb 2010   Views: 4,383   Rating: 0.0 / 5    Votes: 0   Popularity: 0.0
Licence: The Code Project Open License (CPOL)      Bookmarked: 1   Downloaded: 0
In this series of blog posts, I'll be walking through different solutions for deployment scenarios for Windows Phones.
Posted: 22 Feb 2010   Updated: 22 Feb 2010   Views: 5,833   Rating: 5.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 6   Downloaded: 0
One of the readers of this site contacted me via e-mail having read the first post in this series.  He wanted to know how to get one of the sharp looking icons in the start menu that you may have seen in Windows Mobile 6.5.
Files and Folders
Configuration Files
Posted: 1 Mar 2010   Updated: 1 Mar 2010   Views: 8,866   Rating: 4.00/5    Votes: 8   Popularity: 3.54
Licence: The Code Project Open License (CPOL)      Bookmarked: 4   Downloaded: 0
There are times when you will want to share the same source code among several projects. A common way to do so is with a shared assembly; you put common functionality in one project and then share the output among several other projects.
Grid & Data Controls
General
Posted: 30 Nov 2011   Updated: 29 Nov 2011   Views: 8,891   Rating: 5.00/5    Votes: 2   Popularity: 1.51
Licence: The Code Project Open License (CPOL)      Bookmarked: 4   Downloaded: 0
Getting Orientation Data
Miscellaneous
Windows Forms
Posted: 25 Nov 2009   Updated: 25 Nov 2009   Views: 28,131   Rating: 4.00/5    Votes: 6   Popularity: 3.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 10   Downloaded: 0
A quick implementation of FindControl for Windows Forms.
Posted: 30 Nov 2009   Updated: 30 Nov 2009   Views: 6,630   Rating: 0.0 / 5    Votes: 0   Popularity: 0.0
Licence: The Code Project Open License (CPOL)      Bookmarked: 2   Downloaded: 0
An improved FindControl for Windows desktop and mobile.
Mobile Development
General
Posted: 25 Sep 2009   Updated: 25 Sep 2009   Views: 8,390   Rating: 0.0 / 5    Votes: 0   Popularity: 0.0
Licence: The Code Project Open License (CPOL)      Bookmarked: 1   Downloaded: 0
Microsoft's First Accelerometer API (for ZuneHD)
Posted: 11 Nov 2009   Updated: 11 Nov 2009   Views: 7,787   Rating: 0.0 / 5    Votes: 0   Popularity: 0.0
Licence: The Code Project Open License (CPOL)      Bookmarked: 1   Downloaded: 0
I was checking to see if there were any updates on the Samsung Mobile Innovator's Site (http://innovator.samsungmobile.com) and saw something new.  On the landing page there was a new addition added to the platform links called "Bada."  What is Bada?  That's what I wanted to know. Well on the site t
Posted: 30 Sep 2009   Updated: 26 Mar 2010   Views: 6,133   Rating: 3.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 0   Downloaded: 0
When the Windows Marketplace for Mobile was first announced not much was known about the security model that it was going to used.  As a quick review I'll refer back to something that I posted a few months ago in this blog entry."Applications distributed through the Windows Mobile Market Place
Posted: 7 Sep 2010   Updated: 7 Sep 2010   Views: 13,866   Rating: 5.00/5    Votes: 3   Popularity: 2.39
Licence: The Code Project Open License (CPOL)      Bookmarked: 7   Downloaded: 0
Continuation of a blog post on Windows Phone 7 programming. This part covers playing sounds using XNA
Windows Phone 7/8
General
Posted: 2 Aug 2010   Updated: 2 Aug 2010   Views: 27,099   Rating: 5.00/5    Votes: 3   Popularity: 2.39
Licence: The Code Project Open License (CPOL)      Bookmarked: 16   Downloaded: 0
A demonstration of one way to detect shaking motion on Windows Phone 7
Posted: 25 Aug 2010   Updated: 25 Aug 2010   Views: 13,062   Rating: 4.75/5    Votes: 3   Popularity: 2.27
Licence: The Code Project Open License (CPOL)      Bookmarked: 4   Downloaded: 0
Getting to my Isolated Files (Windows Phone 7)
Posted: 7 Sep 2010   Updated: 7 Sep 2010   Views: 29,433   Rating: 4.78/5    Votes: 18   Popularity: 5.98
Licence: The Code Project Open License (CPOL)      Bookmarked: 37   Downloaded: 0
This is the first part of a multi-part blog post on developing for Windows Phone 7. In this post I introduce the new operating system and start with XNA programming.
Posted: 7 Oct 2010   Updated: 13 Oct 2010   Views: 18,977   Rating: 4.93/5    Votes: 7   Popularity: 4.16
Licence: The Code Project Open License (CPOL)      Bookmarked: 4   Downloaded: 0
A brief introduction to the DynamicSoundEffectInstance class for Windows Phone 7 and a demonstration on how to communicate with the class and control pitch.
Posted: 21 Nov 2010   Updated: 21 Nov 2010   Views: 23,767   Rating: 5.00/5    Votes: 12   Popularity: 5.40
Licence: The Code Project Open License (CPOL)      Bookmarked: 20   Downloaded: 0
Playing back data that was recorded from the Microphone, in Windows Phone 7.
Posted: 10 Feb 2011   Updated: 10 Feb 2011   Views: 20,403   Rating: 4.94/5    Votes: 8   Popularity: 4.46
Licence: The Code Project Open License (CPOL)      Bookmarked: 7   Downloaded: 0
You've got a class that contains data that you want to be able to save and load in IsolatedStorage on Windows Phone 7.  How would you go about doing that? There is more than one way, but I wanted to share a generic solution for didactic purposes; I'm finding that many begininers like to start off wi
Posted: 7 Mar 2011   Updated: 7 Mar 2011   Views: 7,925   Rating: 4.00/5    Votes: 3   Popularity: 1.91
Licence: The Code Project Open License (CPOL)      Bookmarked: 7   Downloaded: 54
How to serialize a class that is not serializable.
Posted: 12 Mar 2011   Updated: 12 Mar 2011   Views: 7,273   Rating: 5.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 3   Downloaded: 124
How to implements local high scores in Windows Phone 7.
Posted: 28 Jun 2011   Updated: 28 Jun 2011   Views: 12,977   Rating: 0.0 / 5    Votes: 0   Popularity: 0.0
Licence: The Code Project Open License (CPOL)      Bookmarked: 2   Downloaded: 0
Set custom ring tones in Windows Phone 7.
Posted: 28 Jun 2011   Updated: 28 Jun 2011   Views: 18,845   Rating: 5.00/5    Votes: 4   Popularity: 3.01
Licence: The Code Project Open License (CPOL)      Bookmarked: 6   Downloaded: 353
Download Code (101 KB)Written against pre-release informationOne of the new things that we get with Windows Phone 7 is socket support. While I expected to be able to open sockets to other machines with servers running on them one thing caught me by surprised; that you can also send communication fro
Posted: 7 Aug 2011   Updated: 7 Aug 2011   Views: 12,297   Rating: 4.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 3   Downloaded: 0
Windows Phone NTP Client
Posted: 30 Nov 2011   Updated: 30 Nov 2011   Views: 14,592   Rating: 5.00/5    Votes: 3   Popularity: 2.39
Licence: The Code Project Open License (CPOL)      Bookmarked: 7   Downloaded: 0
A quick write up on location services.
Posted: 24 Jan 2012   Updated: 23 Jan 2012   Views: 7,425   Rating: 5.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 1   Downloaded: 0
How to adjust Microsoft Translator WAVE volume.
Posted: 18 Apr 2012   Updated: 18 Apr 2012   Views: 10,598   Rating: 4.60/5    Votes: 5   Popularity: 3.20
Licence: The Code Project Open License (CPOL)      Bookmarked: 12   Downloaded: 0
Download Code (1.14 MB)I was thinking about how to write code that will work on both Windows Phone 7 and Windows 8 (Metro). In theory some of the techniques that could be used are well known. But I wanted to try them out. So I decided to try some things out in a piece of throw away code. This giv
Posted: 19 Apr 2012   Updated: 19 Apr 2012   Views: 10,639   Rating: 5.00/5    Votes: 2   Popularity: 1.51
Licence: The Code Project Open License (CPOL)      Bookmarked: 2   Downloaded: 0
On the Windows Platforms there is a rule that you cannot modify UI elements from secondary threads. On Microsoft's XAML based platforms there is a member that exists on most UI objects called the Dispatcher that can be used to marshal a call to the proper thread.On Windows Phone 7 and Windows 8 the
C / C++ Language
General
Posted: 15 Dec 2009   Updated: 15 Dec 2009   Views: 9,314   Rating: 5.00/5    Votes: 13   Popularity: 5.57
Licence: The Code Project Open License (CPOL)      Bookmarked: 11   Downloaded: 0
The override that was not
Windows Communication Foundation
General
Posted: 8 Dec 2009   Updated: 8 Dec 2009   Views: 11,129   Rating: 0.0 / 5    Votes: 0   Popularity: 0.0
Licence: The Code Project Open License (CPOL)      Bookmarked: 5   Downloaded: 0
WCF guidance for Windows Mobile.
Windows Presentation Foundation
General
Posted: 2 Oct 2012   Updated: 2 Oct 2012   Views: 3,588   Rating: 0.0 / 5    Votes: 0   Popularity: 0.0
Licence: The Code Project Open License (CPOL)      Bookmarked: 4   Downloaded: 0
Setting the Display for a WPF Application
Windows Runtime
General
Posted: 16 Apr 2012   Updated: 16 Apr 2012   Views: 5,457   Rating: 5.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 1   Downloaded: 0
Data serializer update for Windows Metro.
Algorithms & Recipes
Data Structures
Posted: 30 Jan 2012   Updated: 30 Jan 2012   Views: 11,288   Rating: 5.00/5    Votes: 2   Popularity: 1.51
Licence: The Code Project Open License (CPOL)      Bookmarked: 4   Downloaded: 0
A sparse array class for .NET.
String handling
General
Posted: 28 Dec 2009   Updated: 28 Dec 2009   Views: 26,995   Rating: 4.50/5    Votes: 4   Popularity: 2.67
Licence: The Code Project Open License (CPOL)      Bookmarked: 8   Downloaded: 0
The HttpWebRequest handles redirects automatically. That's usually a nice feature but it can actually get in the way when the web server is setting cookies in the same response in which it is sending a redirect.
Uncategorised Technical Blogs
General
Posted: 11 Nov 2009   Updated: 11 Nov 2009   Views: 5,883   Rating: 4.83/5    Votes: 4   Popularity: 2.91
Licence: The Code Project Open License (CPOL)      Bookmarked: 4   Downloaded: 0
I was asked about something that appeared to be an oddity in some example code that I posted online. The code in question was a single call to the sleep function.Thread.Sleep(0);or if you prefer to see the native code version:Sleep(0);The sleep function is often used to insert delays into code.
Posted: 25 Nov 2009   Updated: 25 Nov 2009   Views: 5,678   Rating: 0.0 / 5    Votes: 0   Popularity: 0.0
Licence: The Code Project Open License (CPOL)      Bookmarked: 2   Downloaded: 0
In both the user and developer forums for the Windows Marketplace for Mobile, I've seen a lot of questions being raised on why a particular application doesn't show up...
Posted: 11 Jan 2010   Updated: 11 Jan 2010   Views: 4,140   Rating: 0.0 / 5    Votes: 0   Popularity: 0.0
Licence: The Code Project Open License (CPOL)      Bookmarked: 2   Downloaded: 0
I was making an application with an About dialog that shows the version number for the app. Rather than add the version number as static text, I made use of reflection to extract the version number from the assembly.
Posted: 13 Jan 2010   Updated: 13 Jan 2010   Views: 6,873   Rating: 0.0 / 5    Votes: 0   Popularity: 0.0
Licence: The Code Project Open License (CPOL)      Bookmarked: 0   Downloaded: 0
For some time I've been meaning to put something through the Marketplace and make the source code available once it passes in the hopes that it will be of value to some one that would otherwise be reluctant about publishing to the Marketplace. This would be a "Hello World" of types, only for the Mar
Posted: 26 Jan 2010   Updated: 26 Jan 2010   Views: 7,679   Rating: 5.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 0   Downloaded: 0
Math without a Floating Point Unit
Posted: 30 Jan 2010   Updated: 30 Jan 2010   Views: 7,077   Rating: 5.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 2   Downloaded: 0
A few days ago I got a message from a developer that was trying to use CeRunAppAtTime to schedule an application to start up. As I had mentioned in a previous post instead of using this function one should use CeSetUserNotification since on more recent devices CeRunAppAtTime is not as reliable (not
Posted: 1 Mar 2010   Updated: 1 Mar 2010   Views: 4,560   Rating: 0.0 / 5    Votes: 0   Popularity: 0.0
Licence: The Code Project Open License (CPOL)      Bookmarked: 0   Downloaded: 0
Between the MSDN forums and some e-mails that I've received, I am seeing a common theme among some of the questions; they deal with undocumented features of Windows phones...
Netduino
General
Posted: 9 Apr 2013   Updated: 9 Apr 2013   Views: 3,644   Rating: 0.0 / 5    Votes: 0   Popularity: 0.0
Licence: The Code Project Open License (CPOL)      Bookmarked: 5   Downloaded: 0
Spin wait timer for .NET Micro Framework.
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Joel Ivory Johnson
Software Developer Razorfish
United States United States
I attended Southern Polytechnic State University and earned a Bachelors of Science in Computer Science and later returned to earn a Masters of Science in Software Engineering.
 
For the past few years I've been providing solutions to clients using Microsoft technologies for web and Windows applications.
 
While most of my CodeProject.com articles are centered around Windows Phone it is only one of the areas in which I work and one of my interests. I also have interest in mobile development on Android and iPhone. Professionally I work with several Microsoft technologies including SQL Server technologies, Silverlight/WPF, ASP.Net and others. My recreational development interest are centered around Artificial Inteligence especially in the area of machine vision.
 
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