wpf样式绑定 行为绑定 事件关联 路由事件实例

代码说明：我要实现一个这样的功能  有三个window窗口  每个窗体有一个label标签  当我修改三个label标签中任意一个字体颜色的时候  其他的label标签字体颜色也变化

首先三个窗体不用贴代码了  直接添加三个就行了

样式绑定：

先添加数据源  代码如下： （注：为了防止propertyName硬编码写死   可以使用CallerMemberName附加属性来获取默认的属性名称 或者使用表达式目录树Expression<Func<T>>的方式来获取）

 public class ButtonBase : ContentControl, INotifyPropertyChanged
     {
         public static readonly RoutedEvent ClickEvent;
         private SolidColorBrush brush = new SolidColorBrush(Colors.Red);

         public event PropertyChangedEventHandler PropertyChanged;

         private static ButtonBase btnBase;

         public static ButtonBase getButtonBase()
         {
             if (btnBase == null)
                 btnBase = new ButtonBase() { Foreground = new SolidColorBrush(Colors.Red) };
             return btnBase;
         }
         public SolidColorBrush Brush
         {
             get { return brush; }
             set
             {
                 if (value != brush)
                 {
                     brush = value;
                     NotifyPropertyChanged<SolidColorBrush>(() => this.Brush);//NotifyPropertyChanged();
                 }
             }
         }
         private void NotifyPropertyChanged([CallerMemberName] String PropertyName = "")
         {
             if (PropertyChanged != null)
                 PropertyChanged(this, new PropertyChangedEventArgs(PropertyName));
         }
         private void NotifyPropertyChanged<T>(Expression<Func<T>> PropertyName)
         {
             if (PropertyChanged != null)
             {
                 var expressions = PropertyName.Body as MemberExpression;

                 PropertyChanged(this, new PropertyChangedEventArgs(expressions.Member.Name));
             }
         }

给Label标签绑定数据源  窗体初始化的时候绑定三遍就可以了  绑定完以后  直接设置就行了

            Binding bind = new Binding();
            bind.Source = ButtonBase.getButtonBase();
            bind.Mode = BindingMode.TwoWay;
            bind.Path = new PropertyPath("Brush");
            label1.SetBinding(Label.ForegroundProperty, bind);        

行为绑定

先添加引用 C:\Program Files (x86)\Microsoft SDKs\Expression\Blend\.NETFramework\v4.5\Libraries\System.Windows.Interactivity.dll
using System.Windows.Interactivity;

定义一个UIElement拖动的行为

 public class DragInCanvasBehavior : Behavior<UIElement>
     {
         private Canvas canvas;
         private bool isDragOn = false;
         private Point mouseOffset;
         protected override void OnAttached()
         {
             base.OnAttached();
             this.AssociatedObject.MouseLeftButtonDown += AssociatedObject_MouseLeftButtonDown;
             this.AssociatedObject.MouseLeftButtonUp += AssociatedObject_MouseLeftButtonUp;
             this.AssociatedObject.MouseMove += AssociatedObject_MouseMove;
         }
         protected override void OnDetaching()
         {
             base.OnDetaching();
             this.AssociatedObject.MouseLeftButtonDown -= AssociatedObject_MouseLeftButtonDown;
             this.AssociatedObject.MouseLeftButtonUp -= AssociatedObject_MouseLeftButtonUp;
             this.AssociatedObject.MouseMove -= AssociatedObject_MouseMove;
         }
         void AssociatedObject_MouseMove(object sender, MouseEventArgs e)
         {
             if (isDragOn)
             {
                 Point point = e.GetPosition(canvas);
                 AssociatedObject.SetValue(Canvas.LeftProperty,point.X);
                 AssociatedObject.SetValue(Canvas.TopProperty,point.Y);
             }
         }

         void AssociatedObject_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
         {
             if (isDragOn)
             {
                 AssociatedObject.ReleaseMouseCapture();
                 isDragOn = false;
             }
         }

         void AssociatedObject_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
         {
             if (canvas == null)
                 canvas = (Canvas)VisualTreeHelper.GetParent(this.AssociatedObject);
             isDragOn = true;
             mouseOffset = e.GetPosition(AssociatedObject);
             AssociatedObject.CaptureMouse();
         }

     }

前台使用该行为

  xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"

 <Canvas HorizontalAlignment="Left" Height="" VerticalAlignment="Top" Width="" Margin="10,138,0,0" RenderTransformOrigin="0.5,0.5">
             <Canvas.RenderTransform>
                 <TransformGroup>
                     <ScaleTransform/>
                     <SkewTransform AngleY="0.583"/>
                     <RotateTransform/>
                     <TranslateTransform Y="0.565"/>
                 </TransformGroup>
             </Canvas.RenderTransform>
             <Rectangle x:Name="dragRec" Canvas.Left="" Canvas.Right="" Fill="Red" Width="" Height="">
                 <i:Interaction.Behaviors>
                     <loc:DragInCanvasBehavior></loc:DragInCanvasBehavior>
                 </i:Interaction.Behaviors>
             </Rectangle>
             <Label Content="abcdefg">
                 <i:Interaction.Behaviors>
                     <loc:DragInCanvasBehavior></loc:DragInCanvasBehavior>
                 </i:Interaction.Behaviors>
             </Label>
         </Canvas>

事件关联   当鼠标放到button上面的时候字体变大  button背景颜色变化

 <Style x:Key="buttonStyle">
             <EventSetter Event="Button.MouseEnter" Handler="button_MouseEnter"></EventSetter>
             <EventSetter Event="Button.MouseLeave" Handler="button_MouseLeave"></EventSetter>
             <Style.Triggers>
                 <EventTrigger RoutedEvent="Mouse.MouseEnter">
                     <EventTrigger.Actions>
                         <BeginStoryboard>
                             <Storyboard>
                                 <DoubleAnimation Duration="0:0:0.2" Storyboard.TargetProperty="FontSize" To="">
                                 </DoubleAnimation>
                             </Storyboard>
                         </BeginStoryboard>
                     </EventTrigger.Actions>
                 </EventTrigger>
                 <EventTrigger RoutedEvent="Mouse.MouseLeave">
                     <EventTrigger.Actions>
                         <BeginStoryboard>
                             <Storyboard>
                                 <DoubleAnimation Duration="0:0:0.1" Storyboard.TargetProperty="FontSize">
                                 </DoubleAnimation>
                             </Storyboard>
                         </BeginStoryboard>
                     </EventTrigger.Actions>
                 </EventTrigger>
             </Style.Triggers>
         </Style>

App.xmal.cs 后台代码

  private void button_MouseEnter(object sender, MouseEventArgs e)
         {
             (sender as Button).Background = new SolidColorBrush(Colors.Brown);
         }
         private void button_MouseLeave(object sender, MouseEventArgs e)
         {
             (sender as Button).Background = null;
         }