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RoutedEvent文本框。LostFocus在我的WPF应用程序中不工作

eventtrigger storyboard xaml wpf

0

Manal Goyal · 技术社区 · 8 年前

<Page.Triggers>
  <EventTrigger RoutedEvent="TextBox.GotFocus">
     <BeginStoryboard>
        <Storyboard>
           <DoubleAnimation
              Storyboard.TargetName="Grid1"
              Storyboard.TargetProperty="Opacity"
              From="1" To="0.1" Duration="0:0:0.2"
              AutoReverse="False" >
           </DoubleAnimation>
        </Storyboard>
     </BeginStoryboard>
  </EventTrigger>
  <EventTrigger RoutedEvent="TextBox.LostFocus">
     <BeginStoryboard>
        <Storyboard>
           <DoubleAnimation
              Storyboard.TargetName="Grid1"
              Storyboard.TargetProperty="Opacity"
              From="0.1" To="1" Duration="0:0:0.2"
              AutoReverse="False">
           </DoubleAnimation>
        </Storyboard>
     </BeginStoryboard>
  </EventTrigger>

<Button
        Name="SearchButton" 
        Height="30" Width="30"
        Grid.Column="1"
        Focusable="True"
        IsHitTestVisible="True"
        Style="{StaticResource SearchButton}"
        Padding="3,3,3,3"
        Margin="3,3,3,3" Click="Button_Click"/>

当我运行应用程序时,点击文本框可以使淡出工作正常。但当我点击按钮时,淡入并没有启动。

1 回复 | 直到 8 年前

1

0

dymanoid 8 年前

你应该把触发器放在 TextBox 直接,而不是在 Page 级别:

  <TextBox>
    <TextBox.Triggers>
      <EventTrigger RoutedEvent="TextBox.GotFocus">
        <BeginStoryboard>
          <Storyboard>
            <DoubleAnimation
               Storyboard.TargetName="Grid1"
               Storyboard.TargetProperty="Opacity"
               From="1" To="0.1" Duration="0:0:0.2"
               FillBehavior="HoldEnd">
            </DoubleAnimation>
          </Storyboard>
        </BeginStoryboard>
      </EventTrigger>
      <EventTrigger RoutedEvent="TextBox.LostFocus">
        <BeginStoryboard>
          <Storyboard>
            <DoubleAnimation
               Storyboard.TargetName="Grid1"
               Storyboard.TargetProperty="Opacity"
               From="0.1" To="1" Duration="0:0:0.2"
               FillBehavior="Stop">
            </DoubleAnimation>
          </Storyboard>
        </BeginStoryboard>
      </EventTrigger>
    </TextBox.Triggers>
  </TextBox>

否则,将为每个事件触发故事板 GotFocus 和 LostFocus 每个的路由事件 UIElement 页