WPF静态资源动态资源资源字典的详解

MainWindow前端代码

<Window x:Class="WpfApp1.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:WpfApp1"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <StackPanel>
            <Button Content="Update" Height="40" Click="Button_Click" Margin="10"/>
            <!--StaticResource 静态资源 不会发生变化-->
            <Button Content="Button1" Height="40" BorderBrush="{StaticResource QCSolidColor}" BorderThickness="5" Margin="10"/>
            <!--DynamicResource 动态资源 可以发生变化-->
            <Button Content="Button2" Height="40" BorderBrush="{DynamicResource QCSolidColor}" BorderThickness="5" Margin="10"/>
        </StackPanel>
    </Grid>
</Window>

MainWindow后端代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApp1
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            this.Resources["QCSolidColor"]=new SolidColorBrush(Colors.Black); //更改QCSolidColor的Color为黑色

            var SolidStyle1 = App.Current.FindResource("QCSolidColor"); //搜索资源 FindResource

            var ButtonStyle1 = App.Current.FindResource("DefaultButton");
        }
    }
}

 资源字典的使用 有的时候定义的样式太多 需要单独新建一个资源字典来放置Style 

ButtonStyle.xaml

ButtonStyle.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    
    <Style x:Key="DefaultButton" TargetType="Button">
        <Setter Property="Foreground" Value="Blue"/>
        <Setter Property="FontSize" Value="15"/>
    </Style>
</ResourceDictionary>

 SolidStyle

SolidStyle.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    
    <SolidColorBrush x:Key="QCSolidColor" Color="Red"/>
    
</ResourceDictionary>

最后在App.xaml中引用

代码如下

<Application x:Class="WpfApp1.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:WpfApp1"
             StartupUri="MainWindow.xaml">
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="SolidStyle.xaml"/>
                <ResourceDictionary Source="ButtonStyle.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>