wpf .netcoreapp 3.1 的 MahApps 中的样式“找不到资源 'MetroButton”

Question

I am upgrading a wpf .netframework 4.7 app that uses MahApps.Metro style to a wpf .netcoreapp3.1 app. Afterthe migration I an getting:

System.Windows.Markup.XamlParseException: ''Provide value on 'System.Windows.StaticResourceExtension' threw an exception.

Exception: Cannot find resource named 'MetroButton'. Resource names are case sensitive.

<ResourceDictionary.MergedDictionaries>
            <!-- MahApps.Metro resource dictionaries. Make sure that all file names are Case Sensitive! -->
            <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/VS/Colors.xaml" />
            <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/VS/Button.xaml" />
            <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/VS/Styles.xaml" />
            <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
            <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />

            <ResourceDictionary>
                <!--Button-->
                <Style x:Key="SmallButtonStyle" TargetType="Button" BasedOn="{StaticResource MetroButton}">
                    <Setter Property="Height" Value="40" />
                    <Setter Property="Width" Value="200" />
                    <Setter Property="Margin" Value="5,2" />
                    <Setter Property="FontSize" Value="14" />
                </Style>
                <Style x:Key="StandardButtonStyle" TargetType="Button" BasedOn="{StaticResource MetroButton}">
                    <Setter Property="Height" Value="50" />
                    <Setter Property="Width" Value="350" />
                    <Setter Property="Margin" Value="10,5" />
                    <Setter Property="FontSize" Value="20" />
                </Style>

This worked with MahApps.Metro version 1.65 under .netframework 4.7 but with MahApps.Metro 2.0.0-alpha0748 I get the exception.

Answer 1

Solution: change MetroButton to MahApps.Styles.Button

 <Style x:Key="SmallButtonStyle" TargetType="Button" BasedOn="{StaticResource MahApps.Styles.Button}">
                    <Setter Property="Height" Value="40" />
                    <Setter Property="Width" Value="200" />
                    <Setter Property="Margin" Value="5,2" />
                    <Setter Property="FontSize" Value="14" />
                </Style>