NLog 2.0 for Silverlight 4 and .NET Framework 4.0 preview builds

NLog 2.0 for Silverlight 4 and .NET Framework 4.0 preview builds

April 16,2010

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This week .NET Framework 4.0 and Silverlight 4 have been released. I’ve updated NLog 2.0 to support them and published a new build – very experimental – on CodePlex. One of the biggest updates in Silverlight 4 is support for out-of-browser applications with elevated permissions,which means applications that can access the filesystem.

I’ve put together a tiny sample that shows how to use NLog in Silverlight application. Basically since Silverlight does not have a concept of application configuration file you should configure Silverlight at application startup. In my case I’ve added this code in App.xaml.cs:

private void Application_Startup(object sender,StartupEventArgs e)
{
    InitializeNLog();
    this.RootVisual = new MainPage();
}

private void InitializeNLog()
{
    SimpleConfigurator.ConfigureForTargetLogging(
        new FileTarget()
        {
            FileName = "${specialfolder:MyDocuments}/log.${shortdate}.txt",Layout = new CsvLayout()
            {
                Columns =
                {
                    new CsvColumn("Time","${longdate}"),new CsvColumn("Level","${level}"),new CsvColumn("Lessage","${message}"),new CsvColumn("Logger","${logger}"),},}
        },LogLevel.Debug);
}

The application will produce CSV-formatted log file in Documents folder. The name of the file will be log.CURRENTDATE.txt.

Usage of NLog stays unchanged:

public partial class MainPage : UserControl
{
    private static Logger logger = LogManager.GetCurrentClassLogger();

    public MainPage()
    {
        InitializeComponent();

        // log some events
        this.Loaded += (sender,e) => logger.Info("Page loaded");
        this.LayoutUpdated += (sender,e) => logger.Debug("Layout updated");
        this.SizeChanged += (sender,e) => logger.Debug("Size changed to {0}x{1}",e.NewSize.Width,e.NewSize.Height);
        this.KeyDown += (sender,e) => logger.Debug("Key down '{0}'",e.Key);
        this.Unloaded += (sender,e) => logger.Info("Unloaded");
    }

    private void button1_Click(object sender,RoutedEventArgs e)
    {
        logger.Info("Button clicked");
    }
}