wpf Trigger

1. 属性触发器Property Trigger：当Dependency Property的值发生改变时触发。

·         2.   数据触发器Data Trigger： 当普通.NET属性的值发生改变时触发。

·         3.   事件触发器Event Trigger： 当路由时间被触发时调用。

 

4.      MultiDataTrigger & MultiTrigger

trigger主要运用的场景在Style、ControlTemplate、DataTemplate三个地方。

 

 <Style x:Key="buttonMouseOver" TargetType="{x:Type Button}">

            <Style.Triggers>

 

                <Trigger Property="IsMouseOver" Value="True">

 

                    <Setter Property="RenderTransform">

 

                        <Setter.Value>

 

                            <RotateTransform Angle="10"></RotateTransform>

 

                        </Setter.Value>

 

                    </Setter>

 

                    <Setter Property="RenderTransformOrigin" Value="0.5,0.5"></Setter>

 

                    <Setter Property="Background" Value="#FF0CC030" />

 

                </Trigger>

 

            </Style.Triggers>

 

        </Style>

 

 

<Style TargetType="{x:Type ListBoxItem}">

    <Style.Triggers>

        <DataTrigger Binding="{Binding Path=Role}" Value="Admin">

            <Setter Property="Foreground" Value="Red" />

        </DataTrigger>

    </Style.Triggers>

</Style>

 

 

<Button.Triggers>

                <EventTrigger RoutedEvent="Button.Click">

 

                    <BeginStoryboard>

 

                        <Storyboard>  

    <ThicknessAnimation  Storyboard.TargetProperty="Margin" Duration="0:0:0.5"   From="50,50,50,50" To="0,0,50,50" AutoReverse="True" />               <DoubleAnimation  Storyboard.TargetName="myDropShadowBitmapEffect" Storyboard.TargetProperty="ShadowDepth"  From="0" To="30" Duration="0:0:0.5"   AutoReverse="True" />

 

 <DoubleAnimation   Storyboard.TargetName="myDropShadowBitmapEffect" Storyboard.TargetProperty="Softness"  From="0" To="1" Duration="0:0:0.5"  AutoReverse="True" />

 

    </Storyboard>

 

      </BeginStoryboard>

 

        </EventTrigger>

 

   </Button.Triggers>

 

 

<Style TargetType="{x:Type Button}" x:Key="highlightStyle">

    <Style.Triggers>

    <Trigger Property="IsEnabled" Value="false">

        <Setter Property="Background" Value="#EEEEEE" />

    </Trigger>

    <MultiTrigger>

        <MultiTrigger.Conditions>

            <Condition Property="Visibility " Value="Visible" />

            <Condition Property="IsEnabled" Value="true" />

        </MultiTrigger.Conditions>

        <Setter Property="BorderBrush" Value="Red"/>

            <Setter Property="FontSize" Value="14" />

            <Setter Property="FontWeight" Value="Bold" />

            <Setter Property="Foreground" Value="Red" />

        </MultiTrigger>

        </Style.Triggers>

</Style>

…

<Button Style="{StaticResource highlightStyle}" Content="Hight Value" x:Name="btnVisible" Click="Button_Click" />