WPF Custom-Control Style Not Implemented-CodePudding

I hope someone can help me please.

I am taking my first tentative steps into WPF by first making a simple custom control. The structure is indicated below.

And the respective code is MainWindow.xaml

<Window x:Class="WPFCustomControl.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:WPFCustomControl.NewFolder1"
    mc:Ignorable="d"
    Title="MainWindow" Height="450" Width="800">

<StackPanel Grid.Row="1">
    <local:MyCustomControl x:Name = "customControl"                                  
     Content = "Click Me" Width = "70" 
     Margin = "10" Click = "customControl_Click"/>
    <TextBlock Name = "txtBlock"  
     Width = "250" Height = "30"/>
</StackPanel>

Generic.xaml

<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WPFCustomControl.NewFolder1">

<Style TargetType="{x:Type local:MyCustomControl}" BasedOn = "{StaticResource {x:Type Button}}">
    <Setter Property = "Background" Value = "LightSalmon" />
    <Setter Property = "Foreground" Value = "Blue"/>
</Style>

Everything works as expected. My issue is when I move the Themes folder into the NewFolder1 the application compiles but no Style is implemented.

Thank you in advance for any advice on how to resolve this.

CodePudding user response：

My issue is when I move the Themes folder into the NewFolder1 the application compiles but no Style is implemented.

That's expected. The default style for the control should be located in themes/generic.xaml. This is by convention and where the framework will look for it.

You may move your Style to another ResourceDictionary in NewFolder1 and then modify themes/generic.xaml to merge this one:

<ResourceDictionary
    ..>

    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="pack://application:,,,/WpfCustomControl;component/NewFolder1/YourDictionary.xaml" />
    </ResourceDictionary.MergedDictionaries>

Or you could just define your custom Style directly in themes/generic.xaml.

CodePudding user response：

Most probably you are doing following mistake, go to App.xaml and add Styles as below example

<Application.Resources>
        <!-- Resources scoped at the Application level should be defined here. -->
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="NewFolder1/Generic.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
        
    </Application.Resources>