Develop Reference

Use Material Design and Caliburn.Micro simalteniously

I use WPF, and C#. I want to use both :MaterialDesign and Caliburn.Micro v4.0173 in one solution in Visual Studio. I have tried to add both of them to App.xaml, but materialDesign does not work. So the view of controls is the same as if I don't installed materialDesign.
<Application x:Class="WPFUI.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WPFUI">
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary>
<local:Bootstrapper x:Key="Bootstrapper"/>
<ResourceDictionary x:Key="MD1" Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Light.xaml" />
<ResourceDictionary x:Key="MD2" Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml" />
<ResourceDictionary x:Key="MD3" Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Primary/MaterialDesignColor.BlueGrey.xaml" />
<ResourceDictionary x:Key="MD4" Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Accent/MaterialDesignColor.Lime.xaml" />
<ResourceDictionary x:Key="MD5" Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.DataGrid.ComboBox.xaml" />
</ResourceDictionary>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
</Application>

Mahapps using VS Styles throws IOException

I'm using Mahapps Tabcontrol in my WPF application. When I use the default styling it works well, if I try to use the VS Styles in the App.xaml:
<Application x:Class="UI.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:system="clr-namespace:System;assembly=mscorlib"
xmlns:vm="clr-namespace:UI.ViewModel"
xmlns:controls="http://metro.mahapps.com/winfx/xaml/controls"
xmlns:local="clr-namespace:UI"
StartupUri="MainWindow.xaml">
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<!-- MahApps.Metro resource dictionaries. Make sure that all file names are Case Sensitive! -->
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Colors.xaml" />
<!-- Accent and AppTheme setting -->
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/Teal.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/BaseDark.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/VS/Controls.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/VS/Colors.xaml" />
<!-- Icons -->
<ResourceDictionary x:Name="IconsDictionary" Source="Resources/Dictionary.xaml"/>
</ResourceDictionary.MergedDictionaries>
<system:Double x:Key="WindowTitleFontSize">16</system:Double>
<FontFamily x:Key="HeaderFontFamily">Segoe UI</FontFamily>
<vm:ViewModelLocator x:Key="MainLocator"/>
</ResourceDictionary>
</Application.Resources>
...it throws an error: IOException: Cannot locate resource 'styles/vs/controls.xaml'.
If I remove the VS/Styles reference from the App.xaml the application compiles.

Found a fix!
First, removed the VS/Styles from the App.xaml:
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<!-- MahApps.Metro resource dictionaries. Make sure that all file names are Case Sensitive! -->
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Colors.xaml" />
<!-- Accent and AppTheme setting -->
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/Teal.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/BaseDark.xaml" />
<!-- Icons -->
<ResourceDictionary x:Name="IconsDictionary" Source="Resources/Dictionary.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
Second, moved it to the MainWindow.xaml under Window.Resources:
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/VS/Colors.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/VS/Styles.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Window.Resources>
Found the fix here resources are not defined in 'Styles\VS\Colors.xaml'

Application a style to all page xaml wpf

I have a style file "dark.xaml" that I will use to style all xaml pages, so I place it in "application.xaml". But why my xaml page can't to access the style of "dark.xml"?
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/rtwin;component/style/Dark.xaml">
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>

From your ResourceDictionary source it seems that you are adding style from an assembly (correct if I'm wrong).
Well, in that case, you need to add pack://application:,,, so that your final App.xaml should look like this,
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/rtwin;component/style/Dark.xaml">
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>

Where to add ObjectDataProvider in Application.Resources with ResourceDictionary

I followed this Tutorial and got stuck on the Create Instance of Config Settings Class-part. Here they just add the ObjectDataProvider in the Application.Resources. In my case there is already a ResourceDictionary in this context and I think this causes the problem.
My App.xaml:
<Application x:Class="MyApp.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:config="clr-namespace:MyApp.ViewModels"
StartupUri="MainWindow.xaml">
<Application.Resources>
<!-- create instance of config-settings class -->
<ObjectDataProvider x:Key="AppSettingsDataProvider" ObjectType="{x:Type config:AppSettingsManager}"/>
<ResourceDictionary x:Key="MainDictionary">
<!-- also not working: -->
<!--<ObjectDataProvider x:Key="AppSettingsDataProvider" ObjectType="{x:Type config:AppSettingsManager}"/>-->
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/Folder/file1.xaml" />
<ResourceDictionary Source="pack://application:,,,/Folder/file2.xaml" />
<!-- <ResourceDictionary Source="{Binding Source={StaticResource AppSettingsDataProvider}, Path=LoadMethod, Mode=OneWay}"/>-->
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
</Application>
When I run the program my ResourceDictionary is not loaded anymore (Application.Current.Ressources.MergedDictionaries is empty), without the ObjectDataProvider everything works fine. Putting the ObjectDataProvider in the ResourceDictionary like suggested in the post Problems adding an ObjectDataProvider in resources did not help (is it different in the Application-class?). So where to put the ObjectDataProvider?

MergedDictionaries nightmare

I'm trying to use a WPF Template and I'm supposed to include this in my App.xaml, but I get "Nested properties are not supported: ResourceDictionaries.MergedDictionaries" error and "The attachable property "MergedDictionaries" was not found in type "ResourceDictionary".
<Application x:Class="Unico.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
StartupUri="MainWindow.xaml">
<Application.Resources>
<ResourceDictionary.MergedDictionaries>
<!-- Set default skin -->
<ResourceDictionary Source="\ExpressionDark.xaml"/>
<ResourceDictionary Source="\WindowStyle.xaml"/>
</ResourceDictionary.MergedDictionaries>
<Style TargetType="{x:Type Rectangle}" />
</Application.Resources>
</Application>
I've tried everything but still can't fix this. Any idea? Thanks.

MergedDictionaries is a property of ResourceDictionary.
Change to:
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
...
</ResourceDictionary.MergedDictionaries>
<Style TargetType="{x:Type Rectangle}" />
</ResourceDictionary>
</Application.Resources>