Archive for the ‘Howto’ Category

DotNetNuke: Workaround for “Validation of viewstate MAC failed” exception when using the DNN 7 login form in multiple tabs

As I’ve written in one of my previous posts, I found out that one gets a “Validation of viewstate MAC failed” exception when submitting a DNN login form and the login status has changed from “not logged in” to “logged in” after the login form initially was loaded (e.g. by using an addition browser tab […]

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SubsonicTools: Export all playlists from Subsonic Music Streamer to .m3u playlist files

Starting with version 4.7 (changelog), the Subsonic Music Streamer no longer saves playlists as .m3u files but stores the playlist information in its internal database to offer a more sophisticated playlist management (like shared and private playlists). Before version 4.7 it was very easy to share the Subsonic playlists with other media servers that also […]

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Eclipse & Windows 64-Bit: Resolve “Java Runtime Environment (JRE) or Java Development Kit (JDK) must be available…” and “Java was started but returned exit code= 13…”

It’s been a while I’ve set up Eclipse the last time and today I tried to run Eclipse (“Eclipse Classic 4.2.1 / 64 Bit” downloaded from here to be precise) on my fresh installed Windows 8. After extracting the zip folder and starting eclipse.exe I got the error message: Java Runtime Environment (JRE) or Java […]

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Ubuntu 12.04.1 LTS & ant: Resolve “Unable to locate tools.jar. Expected to find it in /usr/lib/jvm/java-6-openjdk-amd64/lib/tools.jar”

I recently got the following error when I tried to run ant on a fresh installed Ubuntu 12.04.1 LTS machine: Unable to locate tools.jar. Expected to find it in /usr/lib/jvm/java-6-openjdk-amd64/lib/tools.jar The solution was to install the openjdk-6-jdk package as follows: #sudo apt-get install openjdk-6-jdk#sudo apt-get install openjdk-6-jdk Hope this helps somebody…

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ASP.NET MVC 4 RC: Get current controller name from HttpContext

To find out the name of the current controller from a HTTP context, you can use the following code snippet: var controllerName = RouteTable.Routes.GetRouteData( new HttpContextWrapper(HttpContext.Current) ).Values["controller"].ToString();var controllerName = RouteTable.Routes.GetRouteData( new HttpContextWrapper(HttpContext.Current) ).Values["controller"].ToString();

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ASP.NET MVC 4 RC & ASP.NET Web API: Implementing custom XmlMediaTypeFormatter that ignores XML namespaces

In this blog post I will show how to implement a custom XmlMediaTypeFormatter that extends the default ASP.NET Web API XmlMediaTypeFormatter in a way that it ignores XML namespaces when parsing xml messages. By default the ASP.NET Web API XmlMediaTypeFormatter is not able to parse XML requests that contain any XML namespace declarations. If you […]

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