我正在开发一个列出一些对象的 WPF 网格。如果对象的数据发生变化，我想启动动画。
下面列出了 XAML 代码的摘录
<ListView Name="ListViewEmployeeDetails" Grid.Row="1" Margin="4,109,12,23" ItemsSource="{Binding Products}" >
<ListView.View>
<GridView x:Name="grdTest">
<GridViewColumn Header="ID" Width="100">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock x:Name="idField" Text="{Binding ID}" TextDecorations="Underline" Foreground="Blue"/>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding ID}">
<DataTrigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Duration="0:0:5" To="0.0" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="idField"/>
</Storyboard>
</BeginStoryboard>
</DataTrigger.EnterActions>
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Header="Name" DisplayMemberBinding="{Binding Name}" Width="100" />
<GridViewColumn Header="Price" DisplayMemberBinding="{Binding Price}" Width="100" />
<GridViewColumn Header="Reliab" DisplayMemberBinding="{Binding Reliability}" Width="100" />
</GridView>
</ListView.View>
</ListView>
每当属性发生更改时，我都会触发 PropertyChangedEvent。例如，ID 的设置器如下所示：
set
{
m_ID = value;
OnPropertyChanged("ID");
}
OnPropertyChanged 函数如下所示：
#region INotifyPropertyChanged Members
public event PropertyChangedEventHandler PropertyChanged;
private void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
#endregion
然而，当ID改变时，动画不会被触发。知道如何解决这个问题吗？
您应该使用事件触发器：
尝试这样的事情：
<DataTemplate.Triggers>
<EventTrigger RoutedEvent="Binding.TargetUpdated">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Duration="0:0:5" To="0.0" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="idField"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</DataTemplate.Triggers>
编辑：不要忘记在模板中设置它！
<TextField Name="idField" Text="{Binding ID, NotifyOnTargetUpdated=True}" />
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