本文介绍了WPF扩展器触发器的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有2个并排扩展器。 一次只能打开1个。
I have 2 expanders side by side. Only 1 can be opened at a time.
我想为他们直接在其定义中写触发器 ,例如:
I want to write Triggers for them directly in their definition like this:
<Expander x:Name="MenuOverView" ExpandDirection="Left"> <Expander.Triggers> <Trigger Property="IsExpanded" Value="False" SourceName="MenuDetailed"> <Setter Property="IsExpanded" Value="True" TargetName="MenuOverView" /> </Trigger> </Expander.Triggers> </Expander> <Expander x:Name="MenuDetailed" ExpandDirection="Right"> <Expander.Triggers> <Trigger Property="IsExpanded" Value="False" SourceName="MenuOverView"> <Setter Property="IsExpanded" Value="True" TargetName="MenuDetailed" /> </Trigger> </Expander.Triggers> </Expander>这当然是错误的代码。请问我该怎么做?
This is of course a bad code.. How can I do that please?
推荐答案好的,我认为这是不可能的。 在这种情况下,我提供了一种解决方案:
OK I think that's not possible. I provide a solution in that case:
<!--Add this to the resources dictionary--> <conv:BoolInverterConverter x:Key="boolInvertorConverter" />...
<Expander x:Name="MenuOverView" ExpandDirection="Left" IsExpanded="{Binding ElementName=MenuDetailed, Converter={StaticResource boolInvertorConverter}, Path=IsExpanded}" VerticalContentAlignment="Center" >...
转换器代码:
public class BoolInverterConverter : System.Windows.Data.IValueConverter { #region IValueConverter Members public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { bool i; if (bool.TryParse(value.ToString(), out i) == false) return null; return !i; } public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { bool i; if (bool.TryParse(value.ToString(), out i) == false) return null; return !i; } #endregion }享受!
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WPF扩展器触发器
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