element-plus 更换主题色 SassError: @forward rules must be written before any other rules
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参考技术A新建文件 /style/element/index.scss
刚开始按照element-plus官网描述步骤添加，在main.js中引入创建的文件，
但是会有报错信息，如下：
@forward rules must be written before any other rules. 必须写在任何其他规则之前?
解决方案：
在项目 vue.config.js 配置文件中修改，解决sass变量报错问题
main.js 中引入的文件可以删除了。
WPF 实现更换主题色
WPF 实现更换主题色
WPF 使用 WPFDevelopers.Minimal 如何更换主题色
作者：WPFDevelopersOrg
原文链接： https://github.com/WPFDevelopersOrg/WPFDevelopers.Minimal
框架使用大于等于
.NET40；Visual Studio 2022;项目使用 MIT 开源许可协议；
Nuget
Install-Package WPFDevelopers.Minimal3.2.6-preview定义一个公共颜色资源文件，所有控件都动态资源引用DynamicResource颜色的Key，然后这样修改一个资源文件的Key SolidColorBrush的Color颜色值就可以实现更换主题色；
此篇主要是定义了多个公共颜色资源文件如下，选择不同的资源文件进行更换App.xaml的资源字典实现更换主题色；
在Application.Current.Resources.MergedDictionaries.Remove(Blue) 字典寻找Blue，然后
移除在Application.Current.Resources.MergedDictionaries.Add(Green); 就完成更换主题色；创建 Light.Blue；
创建 Light.Green；
创建 Light.Orange；
创建 Light.Pink；
创建 Light.Purple；
创建 Light.Purple；
使用 WPFDevelopers.Minimal 如何更换主题色Nuget包大于等于3.2.3如下；
新增主题色如下；
新建资源文件Light.Carmine.xaml如下，自己更换颜色值即可；
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:po="http://schemas.microsoft.com/winfx/2006/xaml/presentation/options" po:Freeze="True">
<!--Default颜色-->
<Color x:Key="DefaultBorderBrushColor" po:Freeze="True">#CD7474</Color>
<SolidColorBrush x:Key="DefaultBorderBrushSolidColorBrush" Color="StaticResource DefaultBorderBrushColor" po:Freeze="True"></SolidColorBrush>
<Color x:Key="DefaultBackgroundColor" po:Freeze="True">#CFA0A0</Color>
<SolidColorBrush x:Key="DefaultBackgroundSolidColorBrush" Color="StaticResource DefaultBackgroundColor" po:Freeze="True"></SolidColorBrush>
<Color x:Key="DefaultBackgroundPressedColor" po:Freeze="True">#B70404</Color>
<SolidColorBrush x:Key="DefaultBackgroundPressedSolidColorBrush" Color="StaticResource DefaultBackgroundPressedColor" po:Freeze="True"></SolidColorBrush>
<!--Primary颜色-->
<Color x:Key="PrimaryNormalColor" po:Freeze="True">#B31B1B</Color>
<SolidColorBrush x:Key="PrimaryNormalSolidColorBrush" Color="StaticResource PrimaryNormalColor" po:Freeze="True"></SolidColorBrush>
<SolidColorBrush x:Key="WindowBorderBrushSolidColorBrush" Color="StaticResource PrimaryNormalColor" po:Freeze="True"></SolidColorBrush>
<Color x:Key="PrimaryMouseOverColor" po:Freeze="True">#BB5F5F</Color>
<SolidColorBrush x:Key="PrimaryMouseOverSolidColorBrush" Color="StaticResource PrimaryMouseOverColor" po:Freeze="True"></SolidColorBrush>
<Color x:Key="PrimaryPressedColor" po:Freeze="True">#B70404</Color>
<SolidColorBrush x:Key="PrimaryPressedSolidColorBrush" Color="StaticResource PrimaryPressedColor" po:Freeze="True"></SolidColorBrush>
</ResourceDictionary>1）把上面新增的资源添加App.xaml中即可；
<Application x:Class="WPFDevelopers.Minimal.Sample.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:ws="https://github.com/WPFDevelopersOrg.WPFDevelopers.Minimal"
StartupUri="ExampleViews\\MainView.xaml" ShutdownMode="OnMainWindowClose">
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/WPFDevelopers.Minimal.Sample.Net40;component/Light.Carmine.xaml"/>
<!--需要注意ws:Resources 必须再配色主题后，Theme="Dark" 为黑色皮肤 -->
<ws:Resources Theme="Light"/>
<ResourceDictionary Source="pack://application:,,,/WPFDevelopers.Minimal;component/Themes/Theme.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
</Application>2）或者把资源添加到ThemesCollection集合中；
if (ThemesCollection != null)
ThemesCollection.Add(new ThemeModel
Color = "#B31B1B",
ResourcePath =
"pack://application:,,,/WPFDevelopers.Minimal.Sample.Net40;component/Light.Carmine.xaml"
);重启应用效果如下；
1）ThemeControl.cs代码如下；
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using WPFDevelopers.Minimal.Helpers;
using WPFDevelopers.Minimal.Models;
namespace WPFDevelopers.Minimal.Controls
public class ThemeControl : Control
public static readonly DependencyProperty ItemsSourceProperty =
DependencyProperty.Register("ItemsSource", typeof(ObservableCollection<ThemeModel>), typeof(ThemeControl),
new PropertyMetadata(null));
static ThemeControl()
DefaultStyleKeyProperty.OverrideMetadata(typeof(ThemeControl),
new FrameworkPropertyMetadata(typeof(ThemeControl)));
public ObservableCollection<ThemeModel> ItemsSource
get => (ObservableCollection<ThemeModel>)GetValue(ItemsSourceProperty);
set => SetValue(ItemsSourceProperty, value);
public override void OnApplyTemplate()
base.OnApplyTemplate();
ItemsSource = new ObservableCollection<ThemeModel>();
ItemsSource.Add(new ThemeModel
Color = "#409EFF",
ResourcePath = "pack://application:,,,/WPFDevelopers.Minimal;component/Themes/Light.Blue.xaml"
);
ItemsSource.Add(new ThemeModel
Color = "#FF033E",
ResourcePath = "pack://application:,,,/WPFDevelopers.Minimal;component/Themes/Light.Red.xaml"
);
ItemsSource.Add(new ThemeModel
Color = "#A21BFC",
ResourcePath = "pack://application:,,,/WPFDevelopers.Minimal;component/Themes/Light.Purple.xaml"
);
ItemsSource.Add(new ThemeModel
Color = "#FE9426",
ResourcePath = "pack://application:,,,/WPFDevelopers.Minimal;component/Themes/Light.Orange.xaml"
);
ItemsSource.Add(new ThemeModel
Color = "#00B050",
ResourcePath = "pack://application:,,,/WPFDevelopers.Minimal;component/Themes/Light.Green.xaml"
);
ItemsSource.Add(new ThemeModel
Color = "#FF007F",
ResourcePath = "pack://application:,,,/WPFDevelopers.Minimal;component/Themes/Light.Pink.xaml"
);
if (ThemeCache.ThemesDictCache.Count > 0)
foreach (var item in ThemeCache.ThemesDictCache)
if (ItemsSource.Any(x => x.Color != item.Key))
ItemsSource.Add(item.Value);
SelectChecked();
ItemsSource.CollectionChanged += ItemsSource_CollectionChanged;
foreach (var theme in ItemsSource)
theme.PropertyChanged += Theme_PropertyChanged;
private void SelectChecked()
var existsTheme = ItemsSource.FirstOrDefault(y =>
Application.Current.Resources.MergedDictionaries.ToList().Exists(j =>
j.Source != null && y.ResourcePath.Contains(j.Source.AbsoluteUri)));
if (existsTheme != null)
existsTheme.IsChecked = true;
private void ItemsSource_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
switch (e.Action)
case NotifyCollectionChangedAction.Add:
foreach (ThemeModel item in e.NewItems)
if (!ThemeCache.ThemesDictCache.ContainsKey(item.Color))
ThemeCache.ThemesDictCache.Add(item.Color, item);
item.PropertyChanged += Theme_PropertyChanged;
SelectChecked();
if (!item.IsChecked) return;
ReviseTheme(item);
break;
case NotifyCollectionChangedAction.Remove:
foreach (ThemeModel item in e.NewItems)
if (ThemeCache.ThemesDictCache.ContainsKey(item.Color))
ThemeCache.ThemesDictCache.Remove(item.Color);
break;
case NotifyCollectionChangedAction.Replace:
break;
case NotifyCollectionChangedAction.Move:
break;
case NotifyCollectionChangedAction.Reset:
break;
private void Theme_PropertyChanged(object sender, PropertyChangedEventArgs e)
if (e.PropertyName == nameof(ThemeModel.IsChecked))
var theme = sender as ThemeModel;
if (!theme.IsChecked) return;
ReviseTheme(theme);
private void ReviseTheme(ThemeModel theme)
if (theme == null) return;
var old = ItemsSource.FirstOrDefault(x => x.IsChecked && x.Color != theme.Color);
if (old != null)
ItemsSource.Where(y => !y.Color.Equals(theme.Color) && y.IsChecked).ToList()
.ForEach(h => h.IsChecked = false);
var existingResourceDictionary =
Application.Current.Resources.MergedDictionaries.FirstOrDefault(x =>
x.Source != null && x.Source.Equals(old.ResourcePath));
if (existingResourceDictionary != null)
Application.Current.Resources.MergedDictionaries.Remove(existingResourceDictionary);
var newResource =
Application.Current.Resources.MergedDictionaries.FirstOrDefault(x =>
x.Source != null && x.Source.Equals(theme.ResourcePath));
if (newResource != null) return;
var newResourceDictionary = new ResourceDictionary Source = new Uri(theme.ResourcePath) ;
Application.Current.Resources.MergedDictionaries.Insert(0, newResourceDictionary);
ControlHelper.ThemeRefresh();
public class ThemeCache
public static Dictionary<string, ThemeModel> ThemesDictCache = new Dictionary<string, ThemeModel>();
2）Styles.ThemeControl.xaml代码如下；
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:sys="clr-namespace:System;assembly=mscorlib"
xmlns:wpfsc="clr-namespace:WPFDevelopers.Minimal.Controls"
xmlns:model="clr-namespace:WPFDevelopers.Minimal.Models">
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="../Themes/Basic/ControlBasic.xaml"/>
<ResourceDictionary Source="../Themes/Basic/Animations.xaml"/>
</ResourceDictionary.MergedDictionaries>
<Style TargetType="x:Type wpfsc:ThemeControl">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="x:Type wpfsc:ThemeControl">
<ItemsControl ItemsSource="Binding ItemsSource,RelativeSource=RelativeSource AncestorType=wpfsc:ThemeControl">
<ItemsControl.ItemTemplate>
<DataTemplate>
<RadioButton Height="40" Width="40" Margin="4,0"
Cursor="Hand"
IsChecked="Binding IsChecked">
<RadioButton.Style>
<Style TargetType="x:Type RadioButton">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="x:Type RadioButton">
<Border x:Name="PART_Border"
Padding="2"
BorderThickness="0"
BorderBrush="Binding Color">
<Grid Background="x:Null">
<Rectangle x:Name="PART_Rectangle" Fill="Binding Color"/>
<Path Data="StaticResource PathCheckMark"
Stretch="Fill" Fill="DynamicResource BackgroundSolidColorBrush"
VerticalAlignment="Bottom"
HorizontalAlignment="Right"
Height="10" Width="12"
Margin="0,0,4,4"
Visibility="Binding IsChecked,Converter=StaticResource bool2VisibilityConverter"/>
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Opacity" Value=".8" TargetName="PART_Rectangle"/>
<Setter Property="BorderThickness" Value="1" TargetName="PART_Border"/>
</Trigger>
<Trigger Property="IsChecked" Value="True">
<Setter Property="BorderThickness" Value="1" TargetName="PART_Border"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</RadioButton.Style>
</RadioButton>
</DataTemplate>
</ItemsControl.ItemTemplate>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>3）ThemeControlExample.xaml代码如下；
<!--命名空间-->
xmlns:ws="https://github.com/WPFDevelopersOrg.WPFDevelopers.Minimal"
<TextBlock Text="Theme" FontSize="20" Margin="0,20,0,0"/>
<ws:ThemeControl Margin="0,10" ItemsSource="Binding ThemesCollection,RelativeSource=RelativeSource AncestorType=local:MainView,Mode=OneWayToSource"/>ThemeControl|Github[1]
ThemeControl|码云[2]
Styles.ThemeControl.xaml|Github[3]
Styles.ThemeControl.xaml|码云[4]
参考资料
[1]
ThemeControl|Github: https://github.com/WPFDevelopersOrg/WPFDevelopers.Minimal/blob/main/src/WPFDevelopers.Minimal/WPFDevelopers.Minimal.Shared/Controls/ThemeControl.cs
[2]ThemeControl|码云: https://gitee.com/WPFDevelopersOrg/WPFDevelopers.Minimal/blob/main/src/WPFDevelopers.Minimal/WPFDevelopers.Minimal.Shared/Controls/ThemeControl.cs
[3]Styles.ThemeControl.xaml|Github: https://github.com/WPFDevelopersOrg/WPFDevelopers.Minimal/blob/main/src/WPFDevelopers.Minimal/WPFDevelopers.Minimal.Shared/Styles/Styles.ThemeControl.xaml
[4]Styles.ThemeControl.xaml|码云: https://gitee.com/WPFDevelopersOrg/WPFDevelopers.Minimal/blob/main/src/WPFDevelopers.Minimal/WPFDevelopers.Minimal.Shared/Styles/Styles.ThemeControl.xaml
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