wp7之换肤原理简单分析

纠结很久。。。感觉勉强过得去啦。还望各位大牛指点江山

百度找到这篇参考文章http://www.cnblogs.com/sonyye/archive/2012/03/12/2392679.html#2329255

还有这篇：http://www.cnblogs.com/xumingxiang/archive/2012/03/23/2413342.html

进入正文吧

1 UI代码很简单，一个listbox 和一个标题textblock，一个button按钮

<phone:PhoneApplicationPage 
    x:Class="ChangeSkin.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
  
    mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="768"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    shell:SystemTray.IsVisible="True">

    <!--LayoutRoot 是包含所有页面内容的根网格-->

    <Grid x:Name="LayoutRoot"  >
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!--TitlePanel 包含应用程序的名称和页标题-->
        <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
            <TextBlock x:Name="ApplicationTitle" Text="我的应用程序" />
            <TextBlock x:Name="PageTitle" Text="页面名称"  Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
        </StackPanel>

        <!--ContentPanel - 在此处放置其他内容-->
        <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <ListBox Name="lb">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <TextBlock   Text="{Binding}" Name="lbText"></TextBlock>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>
            <Button Content="换皮肤" HorizontalAlignment="Left" Margin="157,471,0,0" VerticalAlignment="Top" Click="Button_Click_1"  />


        </Grid>
    </Grid>

</phone:PhoneApplicationPage>

View Code

截图如下：

2 新建一个皮肤资源文件，

(ps:这里比较繁琐：新建一个页面文件，删除cs文件，然后找一下这个路径资源文件来参考 C:\Program Files (x86)\Microsoft SDKs\Windows Phone\v7.1\Design\DarkBlue\System.Windows.xaml ，为啥微软不直接提供一个新建皮肤文件？？？？？)

设置Resource，非常重要啊,看下图

皮肤里面文件代码：

<ResourceDictionary
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:System="clr-namespace:System;assembly=mscorlib">
    <Style TargetType="TextBlock" x:Key="tbox">
        <Setter Property="Foreground" Value="White"></Setter>
    </Style>
</ResourceDictionary>

View Code

3、后台代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;

namespace ChangeSkin
{
    public class SkinsHelper
    {
        /// <summary>
        /// 得到皮肤资源文件
        /// </summary>
        /// <param name="Light"></param>
        /// <returns></returns>
        public static ResourceDictionary GetSkinResource(SkinsType Light = SkinsType.Green)
        {
            ResourceDictionary resourceDictionary = new ResourceDictionary();
            string uri = "/ChangeSkin;component/Skins/";
            //这里一定要设置Black.xaml生成操作为Resource
            switch (Light)
            {
                case SkinsType.Green: uri += "Green.xaml"; break;
                case SkinsType.Black: uri += "Black.xaml"; break;
                default: uri += "Green.xaml"; break;
            }
            Application.LoadComponent(resourceDictionary, new Uri(uri, UriKind.Relative));
            Application.Current.Resources.MergedDictionaries.Add(resourceDictionary);
            return resourceDictionary;
        }
    }

    public enum SkinsType
    {
        Green = 0,
        Black = 1
    }
}

View Code

4 工具类

using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Collections.Generic;

namespace JM.Common
{
    public class VisualHelper
    {   
        //获取子类型        
        public static T FindChildOfType<T>(DependencyObject root) where T : class
        {
            var queue = new Queue<DependencyObject>();
            queue.Enqueue(root);
            while (queue.Count > 0)
            {
                DependencyObject current = queue.Dequeue();
                for (int i = VisualTreeHelper.GetChildrenCount(current) - 1; 0 <= i; i--)
                {
                    var child = VisualTreeHelper.GetChild(current, i);
                    var typedChild = child as T;
                    if (typedChild != null)
                    {
                        return typedChild;
                    }
                    queue.Enqueue(child);
                }
            }
            return null;
        }
        public static List<T> GetVisualChildCollection<T>(object parent) where T : UIElement
        {
            List<T> visualCollection = new List<T>();
            GetVisualChildCollection(parent as DependencyObject, visualCollection);
            return visualCollection;
        }
        private static void GetVisualChildCollection<T>(DependencyObject parent, List<T> visualCollection) where T : UIElement
        {
            int count = VisualTreeHelper.GetChildrenCount(parent);
            for (int i = 0; i < count; i++)
            {
                DependencyObject child = VisualTreeHelper.GetChild(parent, i);
                if (child is T)
                {
                    visualCollection.Add(child as T);
                }
                else if (child != null)
                {
                    GetVisualChildCollection(child, visualCollection);
                }
            }
        }
    }
}

View Code

5 调用方法

 private void SetSkins(SkinsType skin = SkinsType.Black)
        {
            SkinsHelper.GetSkinResource(skin);
            this.ApplicationTitle.SetValue(TextBlock.StyleProperty, Application.Current.Resources["tbox"]);

            //listbox文字颜色样式改变
            List<TextBlock> tbList= VisualHelper.GetVisualChildCollection<TextBlock>(lb);
            foreach (TextBlock textBlock in tbList)
            {
                textBlock.SetValue(TextBlock.StyleProperty, Application.Current.Resources["tbox"]);
            }
        }