WPF动画仅在一个方向上移动

我有一系列的触发器来控制一个应该上下移动的酒吧。每次给它一个随机选择的值时，它都会滑到适当的位置：

<Trigger Property="Content" Value="B000">
    <Trigger.EnterActions>
        <BeginStoryboard Name="B000" HandoffBehavior="SnapshotAndReplace">
            <Storyboard FillBehavior="HoldEnd" Duration="0:0:1">
                <DoubleAnimation Storyboard.TargetName="bar1" Storyboard.TargetProperty="Offset" To="0" Duration="0:0:1" BeginTime="0:0:0" />
                <DoubleAnimation Storyboard.TargetName="bar2" Storyboard.TargetProperty="Offset" To="0" Duration="0:0:1" BeginTime="0:0:0" />
            </Storyboard>
        </BeginStoryboard>
    </Trigger.EnterActions>
</Trigger>
<Trigger Property="Content" Value="B125">
    <Trigger.EnterActions>
        <BeginStoryboard Name="B125" HandoffBehavior="SnapshotAndReplace">
            <Storyboard FillBehavior="HoldEnd" Duration="0:0:1">
                <DoubleAnimation Storyboard.TargetName="bar1" Storyboard.TargetProperty="Offset" To=".125" Duration="0:0:1" BeginTime="0:0:0" />
                <DoubleAnimation Storyboard.TargetName="bar2" Storyboard.TargetProperty="Offset" To=".125" Duration="0:0:1" BeginTime="0:0:0" />
            </Storyboard>
        </BeginStoryboard>
    </Trigger.EnterActions>
</Trigger>
<Trigger Property="Content" Value="B250">
    <Trigger.EnterActions>
        <BeginStoryboard Name="B250" HandoffBehavior="SnapshotAndReplace">
            <Storyboard FillBehavior="HoldEnd" Duration="0:0:1">
                <DoubleAnimation Storyboard.TargetName="bar1" Storyboard.TargetProperty="Offset" To=".25" Duration="0:0:1" BeginTime="0:0:0" />
                <DoubleAnimation Storyboard.TargetName="bar2" Storyboard.TargetProperty="Offset" To=".25" Duration="0:0:1" BeginTime="0:0:0" />
            </Storyboard>
        </BeginStoryboard>
    </Trigger.EnterActions>
</Trigger>
<Trigger Property="Content" Value="B500">
    <Trigger.EnterActions>
        <BeginStoryboard Name="B500" HandoffBehavior="SnapshotAndReplace">
            <Storyboard FillBehavior="HoldEnd" Duration="0:0:1">
                <DoubleAnimation Storyboard.TargetName="bar1" Storyboard.TargetProperty="Offset" To=".5" Duration="0:0:1" BeginTime="0:0:0" />
                <DoubleAnimation Storyboard.TargetName="bar2" Storyboard.TargetProperty="Offset" To=".5" Duration="0:0:1" BeginTime="0:0:0" />
            </Storyboard>
        </BeginStoryboard>
    </Trigger.EnterActions>
</Trigger>
<Trigger Property="Content" Value="B750">
    <Trigger.EnterActions>
        <BeginStoryboard Name="B750" HandoffBehavior="SnapshotAndReplace">
            <Storyboard FillBehavior="HoldEnd" Duration="0:0:1">
                <DoubleAnimation Storyboard.TargetName="bar1" Storyboard.TargetProperty="Offset" To=".75" Duration="0:0:1" BeginTime="0:0:0" />
                <DoubleAnimation Storyboard.TargetName="bar2" Storyboard.TargetProperty="Offset" To=".75" Duration="0:0:1" BeginTime="0:0:0" />
            </Storyboard>
        </BeginStoryboard>
    </Trigger.EnterActions>
</Trigger>
<Trigger Property="Content" Value="B1k0">
    <Trigger.EnterActions>
        <BeginStoryboard Name="B1k0" HandoffBehavior="SnapshotAndReplace">
            <Storyboard FillBehavior="HoldEnd" Duration="0:0:1">
                <DoubleAnimation Storyboard.TargetName="bar1" Storyboard.TargetProperty="Offset" To="1" Duration="0:0:1" BeginTime="0:0:0" />
                <DoubleAnimation Storyboard.TargetName="bar2" Storyboard.TargetProperty="Offset" To="1" Duration="0:0:1" BeginTime="0:0:0" />
            </Storyboard>
        </BeginStoryboard>
    </Trigger.EnterActions>
</Trigger>

---

但出于某种原因，它只会向上移动。它应该再次向下移动的部分，它只是坐在那里。在更改之间停止动画只会导致它从底部重新开始，而这不是我想要的。

我不确定你说的下降lol是什么意思，但每个动画/触发器都有进入和退出

对我来说，这听起来像是你在寻求退出，这将允许你把那个东西移回它的起始位置。：）

请查看此链接：

以下是一个例子：

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

  <Setter Property="Opacity" Value="0.25" />

  <Style.Triggers>
    <Trigger Property="IsMouseOver" Value="True">

      <Trigger.EnterActions>
        <BeginStoryboard>
          <Storyboard>
            <DoubleAnimation Storyboard.TargetProperty="Opacity"
              To="1" Duration="0:0:1" />
          </Storyboard>
        </BeginStoryboard>
      </Trigger.EnterActions>
      <Trigger.ExitActions>
        <BeginStoryboard>
          <Storyboard>
            <DoubleAnimation Storyboard.TargetProperty="Opacity"
              To="0.25" Duration="0:0:1" />
          </Storyboard>
        </BeginStoryboard>
      </Trigger.ExitActions>          
    </Trigger>               
  </Style.Triggers>    
</Style>

编辑：

然后您需要有多个双动画，如下所示：

        <BeginStoryboard>
          <Storyboard>
            <DoubleAnimation .... />
            <DoubleAnimation ... />
            <DoubleAnimation ... />
            <DoubleAnimation ... />
          </Storyboard>
        </BeginStoryboard>

您可以尝试不为所有动画指定

HandoffBehavior

和

FillBehavior

。在我添加这两个之前，它们就是这样的。它们也在每一个组合中。试着从上到下分配触发器。如果出现问题，它将不会下降或不会触发第二次。好的。。。这使得它只在第一次上升，然后它只会下降。同样的行为-它再次向上移动的部分只是坐在那里。bar1是什么类型的控制？不，它不应该移回起始位置。下一个触发器应该将其从上一个触发器结束的位置移动到新位置（更高或更低）。请查看我的编辑。你不需要触发器，你只需要动画。他们会一个接一个地被处死。哦，嘿，原来我可以把故事板放在自己的巢穴里。我可以从StaticResource中随机生成序列，并将其设置为默认值。