使用DataTrigger时，不会触发WPF GoToStateAction

问题描述

|| 请考虑以下代码：

<Window>    
    <Window.Tag>
        <Button x:Name=\"myButton\"/>
    </Window.Tag>

    <Grid>
        <visualstatemanager.VisualStateGroups>
            <VisualStateGroup>
                <VisualState x:Name=\"VisualState\">
                    <Storyboard>
                        <ColorAnimationUsingKeyFrames Storyboard.TargetProperty=\"(Panel.Background).(SolidColorBrush.Color)\" Storyboard.TargetName=\"canvas\">
                            <EasingColorKeyFrame KeyTime=\"0\" Value=\"Red\"/>
                        </ColorAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>
            </VisualStateGroup>
        </visualstatemanager.VisualStateGroups>

        <Canvas x:Name=\"canvas\" Background=\"White\">  
            <i:Interaction.Triggers>
                <ei:DataTrigger Value=\"True\">
                    <ei:DataTrigger.Binding>
                        <Binding Path=\"Equals\">
                            <Binding.source>
                                <local:DependencyObjectComparer X=\"{x:Reference myButton}\" Y=\"{x:Reference myButton}\"/>
                            </Binding.source>
                        </Binding>
                    </ei:DataTrigger.Binding>
                    <ei:GoToStateAction StateName=\"VisualState\"/>
                </ei:DataTrigger>
                <i:EventTrigger EventName=\"MouseLeftButtonDown\">
                    <ei:GoToStateAction StateName=\"VisualState\"/>
                </i:EventTrigger>
            </i:Interaction.Triggers>          
        </Canvas>
    </Grid>
</Window>

DependencyObjectComparer确实-比较重要地-比较\“ X \”和\“ Y \”是否相等：

public class EqualityComparer<T> : IEqualityComparer<T>
{
    public EqualityComparer(Func<T,T,bool> comparer)
    {
        Contract.Requires(comparer != null);
        this.m_comparer = comparer;
    }

    public bool Equals(T x,T y)
    {
        return this.m_comparer(x,y);
    }

    public int GetHashCode(T obj)
    {
        return obj.ToString().ToLower().GetHashCode();
    }

    private readonly Func<T,bool> m_comparer;
}

public class LazyEqualityComparer<T> : DependencyObject
{
    static LazyEqualityComparer()
    {
        EqualsProperty = DependencyProperty.Register
        (
            \"Equals\",typeof(bool),typeof(LazyEqualityComparer<T>),null
        );
    }

    public static readonly DependencyProperty EqualsProperty;

    public Func<T,bool> Comparer { get; set; }

    public T X
    {
        get { return this.m_x; }
        set
        {
            if (!object.Equals(this.m_x,value))
            {
                this.m_x = value;
                this.OnComperandChanged();
            }
        }
    }

    public T Y
    {
        get { return this.m_y; }
        set
        {
            if (!object.Equals(this.m_y,value))
            {
                this.m_y = value;
                this.OnComperandChanged();
            }
        }
    }

    [Bindable(true)]
    new public bool Equals
    {
        get { return (bool)this.GetValue(EqualsProperty); }
        private set { this.SetValue(EqualsProperty,value); }
    }

    private void OnComperandChanged()
    {
        this.Equals = new EqualityComparer<T>(
            this.Comparer != null ? this.Comparer : (x,y) => x.Equals(y)
        ).Equals(this.X,this.Y);
    }

    private T m_x;
    private T m_y;
}


public class DependencyObjectComparer : LazyEqualityComparer<DependencyObject> { }

当我单击Canvas时EventTrigger触发时，DataTrigger却没有，但它确实返回了预期值（true）。这种动作和这种触发器之间有什么不兼容吗？ 我不知道我在做什么错。谢谢你的帮助。     

解决方法

        终于找到了自己的解决方案：

<Window>    
    <Window.Tag>
        <Button x:Name=\"myButton\"/>
    </Window.Tag>

    <Grid>              
        <VisualStateManager.VisualStateGroups>
            <VisualStateGroup>
                <VisualState x:Name=\"Default\"/>
                <VisualState x:Name=\"VisualState\">
                    <Storyboard>
                        <ColorAnimationUsingKeyFrames Storyboard.TargetProperty=\"(Panel.Background).(SolidColorBrush.Color)\" Storyboard.TargetName=\"canvas\">
                            <EasingColorKeyFrame KeyTime=\"0\" Value=\"Red\"/>
                        </ColorAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>
            </VisualStateGroup>
        </VisualStateManager.VisualStateGroups>

        <Canvas x:Name=\"canvas\" Background=\"White\">         
            <i:Interaction.Triggers>                
                <ei:PropertyChangedTrigger Binding=\"{Binding Tag,ElementName=window}\">                 
                    <i:Interaction.Behaviors>
                        <ei:ConditionBehavior>
                            <ei:ConditionalExpression>
                                <ei:ComparisonCondition LeftOperand=\"{Binding Tag,ElementName=window}\" RightOperand=\"{x:Reference myButton}\"/>
                            </ei:ConditionalExpression>
                        </ei:ConditionBehavior>
                    </i:Interaction.Behaviors>
                    <ei:GoToStateAction StateName=\"VisualState\"/>                       
                </ei:PropertyChangedTrigger>
                <ei:PropertyChangedTrigger Binding=\"{Binding Tag,ElementName=window}\" RightOperand=\"{x:Reference myButton}\" Operator=\"NotEqual\"/>
                            </ei:ConditionalExpression>
                        </ei:ConditionBehavior>
                    </i:Interaction.Behaviors>
                    <ei:GoToStateAction StateName=\"Default\"/>                       
                </ei:PropertyChangedTrigger>
            </i:Interaction.Triggers>
        </Canvas>
    </Grid>
</Window>

有人知道是否有可能在不使用更改的运算符再次编写条件的情况下设置False-State吗？就像使用DataStateBehavior一样。