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《深入浅出WPF》读书笔记.10资源

article 2024/11/18 3:24:18

《深入浅出WPF》读书笔记.10资源

背景

这一章主要讲资源，包括StaticResource，DynamicResource，以及二进制资源等等

资源

ResourceDictionary

资源对象为object类型，需要自己进行类型转换

<Window x:Class="ResourceDemo.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:ResourceDemo"
        xmlns:sys="clr-namespace:System;assembly=mscorlib"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800" Loaded="Window_Loaded">
    <Window.Resources>
        <ResourceDictionary>
            <sys:String x:Key="str1">沉舟侧畔千帆过</sys:String>
            <sys:Double x:Key="db1">3.14</sys:Double>
        </ResourceDictionary>
    </Window.Resources>
    <Grid>
        <StackPanel>
            <TextBox Height="40" Text="{StaticResource ResourceKey=str1}" ></TextBox>
            <TextBox Height="40" x:Name="tb2"></TextBox>
            <!--<TextBox Height="40" Text="{StaticResource ResourceKey=db1}"></TextBox>-->
        </StackPanel>
    </Grid>
</Window>

可以使用资源设置样式

StaticResource和DynamicResource的区别

StaticResource：程序初始化只使用一次

DynamicResource：程序在运行中也在不断使用时

<Window x:Class="ResourceDemo.DynamicAndStaticDemo"
        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:ResourceDemo"
        xmlns:sys="clr-namespace:System;assembly=mscorlib"
        mc:Ignorable="d"
        Title="DynamicAndStaticDemo" Height="300" Width="400">
    <Window.Resources>
        <ResourceDictionary>
            <sys:String x:Key="str1">沉舟侧畔千帆过</sys:String>
            <sys:String x:Key="str2">病树前头万木春</sys:String>
        </ResourceDictionary>
    </Window.Resources>
    <Grid>

        <StackPanel >
            <Button x:Name="btn1" Content="{StaticResource str1}" Margin="5"></Button>
            <Button x:Name="btn2" Content="{DynamicResource str2}" Margin="5"></Button>
            <!--二进制文件资源-->
            <Button x:Name="btn4" Content="{x:Static local:Resource1.str1}" Margin="5"></Button>
            <Button x:Name="btn3" Content="Update" Margin="5" Click="btn3_Click"></Button>
            <StackPanel Height="100">
                <Image x:Name="img1"  Stretch="Fill"></Image>
                <!--<Image x:Name="img1" Source="pack://application:,,,/ResourceImage/screen1.png" Stretch="Fill"></Image>-->
                <!--<Image Source="ResourceImage/screen1.png" Stretch="Fill"></Image>-->
            </StackPanel>
        </StackPanel>
    </Grid>
</Window>

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.Shapes;

namespace ResourceDemo
{
    /// <summary>
    /// DynamicAndStaticDemo.xaml 的交互逻辑
    /// </summary>
    public partial class DynamicAndStaticDemo : Window
    {
        public DynamicAndStaticDemo()
        {
            InitializeComponent();
            //使用uri加载资源文件
            Uri uri = new Uri(@"pack://application:,,,/ResourceImage/screen1.png", UriKind.Absolute);
            //Uri uri = new Uri(@"/ResourceImage/screen1.png", UriKind.Relative);
            this.img1.Source=new BitmapImage(uri);
        }

        private void btn3_Click(object sender, RoutedEventArgs e)
        {
            this.Resources["str1"] = new TextBlock() { Text = "ABCD" };
            this.Resources["str2"] = new TextBlock() { Text = "efgh" };
            //代码中访问二进制资源
            string str3 = Resource1.str1;
        }
    }
}

二进制资源

修改资源文件的权限

修改生成类型

使用Pack URI访问资源文件

            Uri uri = new Uri(@"pack://application:,,,/ResourceImage/screen1.png", UriKind.Absolute);
            //Uri uri = new Uri(@"/ResourceImage/screen1.png", UriKind.Relative);
            this.img1.Source=new BitmapImage(uri);

                <!--<Image x:Name="img1" Source="pack://application:,,,/ResourceImage/screen1.png" Stretch="Fill"></Image>-->
                <!--<Image Source="ResourceImage/screen1.png" Stretch="Fill"></Image>-->