我正在尝试使用DataTriggerBehavior
来自行为 SDK。但它似乎不适用于枚举......否则我做错了什么。
您可以假设DataContext
对于这些例子来说是这样的(INotifyPropertyChanged
已实现,但我不打算在这里展示):
public class MyDataClass
{
public MyEnum ItemCommand { get; set; }
public string ItemCommandString { get; set; }
}
public enum MyEnum
{
EnumValue1
}
_Button.DataContext = new MyDataClass() { ItemCommand = MyEnum.EnumValue1,
ItemCommandString = "EnumValue1" };
以下是不起作用的代码(尝试指定枚举值并检查 ItemCommand 枚举属性):
<ToggleButton x:Name="_Button">
<Interactivity:Interaction.Behaviors>
<Core:DataTriggerBehavior Binding="{Binding ItemCommand}"
Value="EnumValue1">
<Core:ChangePropertyAction PropertyName="Command"
TargetObject="{Binding ElementName=_Button}"
Value="{x:Null}">
</Core:ChangePropertyAction>
</Core:DataTriggerBehavior>
</Interactivity:Interaction.Behaviors>
</ToggleButton>
并且此代码(检查枚举资源)也不起作用:
<UserControl.Resources>
<local:MyEnum x:Key="_MyEnumValue">EnumValue1</local:MyEnum>
</UserControl.Resources>
<ToggleButton x:Name="_Button">
<Interactivity:Interaction.Behaviors>
<Core:DataTriggerBehavior Binding="{Binding ItemCommand}"
Value="{StaticResource _MyEnumValue}">
<Core:ChangePropertyAction PropertyName="Command"
TargetObject="{Binding ElementName=_Button}"
Value="{x:Null}">
</Core:ChangePropertyAction>
</Core:DataTriggerBehavior>
</Interactivity:Interaction.Behaviors>
</ToggleButton>
而这段代码(检查字符串)确实有效:
<ToggleButton x:Name="_Button">
<Interactivity:Interaction.Behaviors>
<Core:DataTriggerBehavior Binding="{Binding ItemCommandString}"
Value="EnumValue1">
<Core:ChangePropertyAction PropertyName="Command"
TargetObject="{Binding ElementName=_Button}"
Value="{x:Null}">
</Core:ChangePropertyAction>
</Core:DataTriggerBehavior>
</Interactivity:Interaction.Behaviors>
</ToggleButton>
在中指定枚举值的正确方法是什么DataTriggerBehavior
Value
财产,这样这会起作用吗?