WPF扩展器触发器

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！