主题资源网站创建时 如何突出设计的特点,微信内转发的网页怎么制作,宝安网页设计培训,网站建设开发综合实训报告使用ModelLocator来管理视图 之前只是简单的介绍了一下ModelLocator的用法#xff0c;在这里要把模型和视图结合起来#xff0c;通过模型来来控制视图。在Silverlight中我们可以看到所有新建立的xaml都是继承自UserControl#xff0c;所以在这里更新欢称视图为控件。至此给出… 使用ModelLocator来管理视图 之前只是简单的介绍了一下ModelLocator的用法在这里要把模型和视图结合起来通过模型来来控制视图。在Silverlight中我们可以看到所有新建立的xaml都是继承自UserControl所以在这里更新欢称视图为控件。至此给出一个项目的结构图出来。这里我是习惯把从网上下载的第三方类库放在项目中一个Lib的目录下如果有源码的话直接加入解决方案中也是可以的。 所有的用户控件都是创建在Controls目录下。这里提到了创建用户控件所以就不得不提一下控件的DependencyProperty属性他是控件的一个静态的属性主要用来做数据绑定。 为控件创建DependencyProperty属性 创建了DependencyProperty后能更方便的和ModelLocator进行绑定。处理一些界面上的动画效果也能更加的灵活。 这里给出一个标准的代码 // Using a DependencyProperty as the backing store for TheName. // This enables animation, styling, binding, etc public static readonly DependencyProperty TheNameProperty DependencyProperty.Register(TheName, typeof(string), typeof(Page), new PropertyMetadata(, new PropertyChangedCallback( OnTheNameChanged))); static void OnTheNameChanged(object sender, DependencyPropertyChangedEventArgs args) { // Get reference to self Page source (Page)sender; // Add Handling Code string newValue (string)args.NewValue; } 更多关于创建自定义用户控件的请查看winter-cn 前辈的《Silverlight 2 Customized Control 开发》 写的非常的详细。我这里就不再去重复的发明轮子了 创建一个会变色的控件 这里首先看Demo 学习是一个温故知新的过程之前我写过一篇《动态创建Storyboard》这里就用上他再结合DependencyProperty做一个会变色的控件。 运用DependencyProperty结合Storyboard创建控件 public partial class BackGorund : UserControl { public byte R { get { return (byte)GetValue(RProperty); } set { SetValue(RProperty, value); } } // Using a DependencyProperty as the backing store for R. // This enables animation, styling, binding, etc public static readonly DependencyProperty RProperty DependencyProperty.Register(R, typeof(byte), typeof(BackGorund), new PropertyMetadata((byte)0, new PropertyChangedCallback(OnRChanged))); static void OnRChanged(object sender, DependencyPropertyChangedEventArgs args) { // Get reference to self BackGorund source (BackGorund)sender; source.changeColor(); } public byte G { get { return (byte)GetValue(GProperty); } set { SetValue(GProperty, value); } } // Using a DependencyProperty as the backing store for G. // This enables animation, styling, binding, etc public static readonly DependencyProperty GProperty DependencyProperty.Register(G, typeof(byte), typeof(BackGorund), new PropertyMetadata((byte)0, new PropertyChangedCallback(OnGChanged))); static void OnGChanged(object sender, DependencyPropertyChangedEventArgs args) { // Get reference to self BackGorund source (BackGorund)sender; source.changeColor(); } public byte B { get { return (byte)GetValue(BProperty); } set { SetValue(BProperty, value); } } // Using a DependencyProperty as the backing store for B. // This enables animation, styling, binding, etc public static readonly DependencyProperty BProperty DependencyProperty.Register(B, typeof(byte), typeof(BackGorund), new PropertyMetadata((byte)0, new PropertyChangedCallback(OnBChanged))); static void OnBChanged(object sender, DependencyPropertyChangedEventArgs args) { // Get reference to self BackGorund source (BackGorund)sender; source.changeColor(); } public void changeColor() { colorAnim.To Color.FromArgb(255, R, G, B); storyboard.Begin(); } private ColorAnimation colorAnim; private Storyboard storyboard; public BackGorund() { InitializeComponent(); storyboard new Storyboard(); Brush br this.LayoutRoot.Background; colorAnim new ColorAnimation(); colorAnim.To Color.FromArgb(255, R, G, B); colorAnim.Duration TimeSpan.FromSeconds(1); colorAnim.RepeatBehavior new RepeatBehavior(1); colorAnim.AutoReverse false; Storyboard.SetTarget(colorAnim, br); Storyboard.SetTargetProperty(colorAnim, new PropertyPath(Color)); storyboard.Children.Add(colorAnim); Resources.Add(colorsb, storyboard); this.Loaded new RoutedEventHandler(BackGorund_Loaded); } } 创建ModelLocator public class BackGroundModel : ModelLocator { private static readonly BackGroundModel _instance new BackGroundModel(); public static BackGroundModel Instance { get { return _instance; } } static BackGroundModel() { } private BackGroundModel() : base() { } private byte _R (byte)0; public byte R { get { return _R; } set { _R value; NotifyPropertyChanged(R); } } private byte _G (byte)0; public byte G { get { return _G; } set { _G value; NotifyPropertyChanged(G); } } private byte _B (byte)0; public byte B { get { return _B; } set { _B value; NotifyPropertyChanged(B); } } } 控件Load时绑定属性通过模型来控制视图 void BackGorund_Loaded(object sender, RoutedEventArgs e) { this.DataContext BackGroundModel.Instance; Binding bindR new Binding(R); bindR.Mode BindingMode.TwoWay; this.SetBinding(RProperty, bindR); Binding bindG new Binding(G); bindG.Mode BindingMode.TwoWay; this.SetBinding(GProperty, bindG); Binding bindB new Binding(B); bindB.Mode BindingMode.TwoWay; this.SetBinding(BProperty, bindB); } 提高效率 Shawn Wildermuth 写了一个Code Snippets能帮我们快速的创建DependencyProperty属性具体用法与下载地址请访问这里 。我自己写了一个快速创建ModelLocator的Code Snippets用法都是一样点击这里 下载。 送上视频 ViewManagerP1.wmv 基于Cairngorm的Silverlight开发 - part2 转载于:https://www.cnblogs.com/nasa/archive/2009/03/15/Cairngorm-Silverligh-part3.html
