我有与情节提要的网格,如下所示。
<Grid x:Name="grd_Order" Grid.Column="2" Height="16" Margin="0,-2,0,0" Visibility="Collapsed" HorizontalAlignment="Center" VerticalAlignment="Center">
<Grid.Resources>
<Storyboard x:Key="stry_OrderMsgShowHide" RepeatBehavior="3x">
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(Visibility)" >
<DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Visible}"/>
<DiscreteObjectKeyFrame KeyTime="0:0:2" Value="{x:Static Visibility.Collapsed}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</Grid.Resources>
<Grid.Style>
<Style >
<Style.Triggers>
<DataTrigger Value="True" Binding="{Binding Path=BlinkOrderAlert,Mode=TwoWay}">
<DataTrigger.EnterActions>
<BeginStoryboard x:Name="stry_BlinkOrdAlert" Storyboard="{StaticResource stry_OrderMsgShowHide}"/>
</DataTrigger.EnterActions>
</DataTrigger>
</Style.Triggers>
</Style>
在我的ViewModel.cs中
private bool blinkOrderAlert;
public bool BlinkOrderAlert
{
get
{
return blinkOrderAlert;
}
set
{
if (blinkOrderAlert == value)
return;
this.blinkOrderAlert = value;
this.RaisePropertyChanged(this, new PropertyChangedEventArgs("BlinkOrderAlert"));
}
}
public void BlinkOrdAlert()
{
this.BlinkOrderAlert=false;
this.BlinkOrderAlert = true;
}
public ViewModel()
{
this.BlinkOrderAlert=true;
}
并且仅在构造函数初始化时才第一次起作用。每当我调用BlinkOrdAlert函数时,它就不再起作用。每次调用函数时,如何修改数据触发器以运行情节提要?谢谢。
最佳答案
考虑将以下数据触发器添加到样式中。
当BlinkOrderAlert值设置为false时,Following数据触发器将删除故事板,当该值为true时,它将添加故事板。
希望这会有所帮助。
<DataTrigger Value="False" Binding="{Binding Path=BlinkOrderAlert,Mode=TwoWay}">
<DataTrigger.EnterActions>
<RemoveStoryboard BeginStoryboardName="stry_BlinkOrdAlert"></RemoveStoryboard>
</DataTrigger.EnterActions>
</DataTrigger>