我在运行时使用XAML中的datatrigger更改绑定,如下所示:
<ToggleButton Checked="MinSyncX_OnChecked" Unchecked="MinSyncX_OnUnchecked" TargetUpdated="FrameworkElement_OnTargetUpdated"
Tag="{Binding Path=CameraViewDirection, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}"
ToolTip="{Binding Source={StaticResource CameraLocalization}, Path=ToolTips.SyncX, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}">
<ToggleButton.Style>
<Style TargetType="ToggleButton" BasedOn="{StaticResource CameraSyncCommonStyle}">
<Style.Triggers>
<DataTrigger Binding="{Binding Path=CameraViewDirection.Limitations.UI.SelectedLimitation.W, NotifyOnTargetUpdated=True, NotifyOnSourceUpdated=True, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" Value="0">
<Setter Property="IsEnabled" Value="{Binding Path=CameraViewDirection.Limitations.UI.IsMinTripleEnabled.X, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}"></Setter>
<Setter Property="IsChecked" Value="{Binding Path=CameraViewDirection.Limitations.UI.IsMinTripleChecked.X, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"></Setter>
</DataTrigger>
<DataTrigger Binding="{Binding Path=CameraViewDirection.Limitations.UI.SelectedLimitation.W, NotifyOnTargetUpdated=True, NotifyOnSourceUpdated=True, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" Value="1">
<Setter Property="IsEnabled" Value="{Binding Path=CameraViewDirection.Limitations.UI.IsMaxTripleEnabled.X, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"></Setter>
<Setter Property="IsChecked" Value="{Binding Path=CameraViewDirection.Limitations.UI.IsMaxTripleChecked.X, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"></Setter>
</DataTrigger>
<DataTrigger Binding="{Binding Path=CameraViewDirection.Limitations.UI.SelectedLimitation.W, NotifyOnTargetUpdated=True, NotifyOnSourceUpdated=True, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" Value="2">
<Setter Property="IsEnabled" Value="{Binding Path=CameraViewDirection.Limitations.UI.IsBothTripleEnabled.X, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"></Setter>
<Setter Property="IsChecked" Value="{Binding Path=CameraViewDirection.Limitations.UI.IsBothTripleChecked.X, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"></Setter>
</DataTrigger>
</Style.Triggers>
</Style>
</ToggleButton.Style>
<ToggleButton.Content>
<Image Source="{Binding Source={StaticResource CameraIcons}, Path=XAxis, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}"></Image>
</ToggleButton.Content>
</ToggleButton>
一切似乎都很好 - 绑定确实发生了变化,但我有一个问题,我不知道如何解决:
更改绑定后,即使绑定值为true,MinSyncX_OnUnchecked
事件也会触发,这意味着切换按钮必须保持选中状态。
在绑定切换期间触发此事件会使我的代码失败,所以我现在希望如果IsChecked
属性必须设置为true,如何在绑定更改期间禁止此事件。
有点棘手,但我希望你能理解我的问题。
修改
有一点我注意到,如果数据触发值切换到列表中的第一个,则未经检查的事件会一直触发。即使它有一个值= 1或值= 2。 这是设计还是可以某种方式修复?
答案 0 :(得分:1)
我意识到我有双重绑定,因此,当绑定更改时,我的绑定属性首先从按钮接收值(这就是未经检查的事件触发的原因)。我找到的解决方案是:通过一些bool值锁定未检查事件的逻辑,并在绑定更改时切换该值(在我的情况下,在combobx上选择更改事件)