WPF and Silverlight 学习笔记(二):WPF和Silverlight概述

WPF(Windows Presentation Foundation,Windows外观基础(直译))是基于Framework 3.0(含以后版本)的新一代Windows界面开发技术。

Silverlight(中文翻译为“银光”),可以看成是WPF的Web应用产品,其早先名为WPF/E。其主要应用于Web富客户端应用程序(RIA,Rich Interface Application)。现阶段此技术可以说比较“火”,微软在此方面主要的对手就是Adobe公司的以Flash为基础的Flex技术。

两者均是以XAML为基础的,在某些条件下是可以相互的转换:如定义一个简单的ARGB调色版应用:

WPF应用程序如下:

  • XAML文件:
<Window x:Class="WPFColorVersion.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="WPF Color Version" Height="300" Width="400" WindowStartupLocation="CenterScreen" ResizeMode="NoResize">
    <Canvas Margin="0,0,0,0">
        <Canvas.Background>
            <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                <GradientStop Color="#FF6254E2" Offset="0.996"/>
                <GradientStop Color="#FFFFFFFF" Offset="0"/>
            </LinearGradientBrush>
        </Canvas.Background>
        <TextBlock Height="34" Canvas.Left="28" Canvas.Top="17" Text="WPF Color Version" TextWrapping="Wrap" FontSize="24" 
             FontFamily="Comic Sans MS" FontWeight="Bold"/>
        <TextBlock Height="34" Canvas.Left="22" Canvas.Top="38" FontFamily="Comic Sans MS" FontSize="24" FontWeight="Bold" 
             Text="WPF Color Version" TextWrapping="Wrap" RenderTransformOrigin="0.5,0.5">
            <TextBlock.Foreground>
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="#FF000000" Offset="1"/>
                    <GradientStop Color="#FFD9DFF0" Offset="0.026"/>
                    <GradientStop Color="#FF7D818B" Offset="0.78"/>
                </LinearGradientBrush>
            </TextBlock.Foreground>
            <TextBlock.RenderTransform>
                <TransformGroup>
                    <ScaleTransform ScaleX="1" ScaleY="-1"/>
                    <SkewTransform AngleX="-29" AngleY="0"/>
                    <RotateTransform Angle="0"/>
                    <TranslateTransform X="0" Y="0"/>
                </TransformGroup>
            </TextBlock.RenderTransform>
        </TextBlock>
        <Rectangle Fill="#00000000" Width="156" Height="103" Canvas.Left="219" Canvas.Top="108" x:Name="demoArea" />
        <TextBlock Width="15" Height="17" Canvas.Top="116" Text="A" TextWrapping="Wrap" Canvas.Left="28" HorizontalAlignment="Center"/>
        <TextBlock Width="15" Height="17" Canvas.Left="28" Canvas.Top="142" Text="R" TextWrapping="Wrap" HorizontalAlignment="Center"/>
        <TextBlock Width="15" Height="17" Canvas.Left="28" Canvas.Top="166" Text="G" TextWrapping="Wrap" HorizontalAlignment="Center"/>
        <TextBlock Width="15" Height="17" Canvas.Left="28" Canvas.Top="194" Text="B" TextWrapping="Wrap" HorizontalAlignment="Center"/>
        <Slider Width="148" Height="22" Canvas.Left="43" Canvas.Top="111" Maximum="255" x:Name="sliderA" ValueChanged="sliderValueChanged"/>
        <Slider Width="148" Height="22" Canvas.Left="43" Canvas.Top="137" Maximum="255" x:Name="sliderR" ValueChanged="sliderValueChanged"/>
        <Slider Width="148" Height="22" Canvas.Left="43" Canvas.Top="163" Maximum="255" x:Name="sliderG" ValueChanged="sliderValueChanged"/>
        <Slider Width="148" Height="22" Canvas.Left="43" Canvas.Top="189" Maximum="255" x:Name="sliderB" ValueChanged="sliderValueChanged"/>
        <TextBlock Width="75" Height="17" Canvas.Left="143" Canvas.Top="230" Text="Color Value:"/>
        <TextBox Width="89" Height="20" Canvas.Left="219" Canvas.Top="227" Text="#00000000" x:Name="txtColorValue"/>
    </Canvas>
</Window>
  • 代码文件:
using System.Windows;
using System.Windows.Media;

namespace WPFColorVersion
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void sliderValueChanged(object sender, System.Windows.RoutedPropertyChangedEventArgs<double> e)
        {
            byte a = (byte)(sliderA.Value);
            byte r = (byte)(sliderR.Value);
            byte g = (byte)(sliderG.Value);
            byte b = (byte)(sliderB.Value);

            Color clr = Color.FromArgb(a, r, g, b);

            demoArea.Fill = new SolidColorBrush(clr);
            txtColorValue.Text = clr.ToString();
        }
    }
}

而对应在Silverlight中,XAML文件内:

<UserControl x:Class="SilverlightColorVersion.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    Width="400" Height="300">
    <!--此位置与WPF项目的XAML文件内容完全相同-->
</UserControl>

另外,Silverlight的代码文件内容也与WPF项目中的代码相同。

WPF应用程序执行的结果如下:

WPFColorVersion

在FireFox(3.0.8)及IE(8.0)中执行Silverlight项目的结果如下:

SilverlightColorVersion_FF SilverlightColorVersion_IE

从此可以看出,WPF与Silverlight有着千丝万缕的联系,我们在学习过程中可以相互的对比。

 

示例代码下载

posted @ 2009-04-07 16:26 龙腾于海 阅读(...) 评论(...) 编辑 收藏