The Silverlight Toolkit base Theme control provides support for changing a theme at runtime. Unfortunately, the Application Themes like the JetPack Theme are no Toolkit themes (ask Microsoft why). So you'd have to convert them yourself. A look at the Toolkit themes sources helps us to figure out how:
public class JetPackTheme : Theme { private static Uri ThemeResourceUri = new Uri("/MyComponent;component/JetPackTheme.xaml", UriKind.Relative); public JetPackTheme() : base(ThemeResourceUri) { } public static bool GetIsApplicationTheme(Application app) { return GetApplicationThemeUri(app) == ThemeResourceUri; } public static void SetIsApplicationTheme(Application app, bool value) { SetApplicationThemeUri(app, ThemeResourceUri); } }
Now, assuming your resources are in a folder called JetPackTheme, here is JetPackTheme.xaml:
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="/MyComponent;component/JetPackTheme/Brushes.xaml"/> <ResourceDictionary Source="/MyComponent;component/JetPackTheme/Fonts.xaml"/> <ResourceDictionary Source="/MyComponent;component/JetPackTheme/CoreStyles.xaml"/> <ResourceDictionary Source="/MyComponent;component/JetPackTheme/Styles.xaml"/> <ResourceDictionary Source="/MyComponent;component/JetPackTheme/SdkStyles.xaml"/> <ResourceDictionary Source="/MyComponent;component/JetPackTheme/ToolkitStyles.xaml"/> </ResourceDictionary.MergedDictionaries> </ResourceDictionary>
Now you should be able to use a JetPackTheme control in your application:
<myCmp:JetPackTheme x:Name="myTheme"> <SomeNeatStuff> ... </SomeNeatStuff> </myCmp:JetPackTheme>
To change the theme at runtime, you can simply do
myTheme.ThemeUri = new Uri("Path/To/The/Theme.xaml", UriKind.RelativeOrAbsoluteOrWhatever);
