我正在尝试实现一个可检查菜单,其中一次只检查一个菜单项,即单选按钮行为。我想用样式和数据触发器实现这一点,以保持它在xaml中。目的是观察其他项目;只要其他任何一个为真,就应该设置为false。实际上,一次只检查一个,但是需要按下两个按钮。如何只需按一下按钮即可使其工作?
<MenuItem Header="Header">
<MenuItem x:Name="ChangesMenuItem" Header="Changes" IsCheckable="True" Command="{Binding ViewChangesCommand}">
<MenuItem.Style>
<Style TargetType="MenuItem">
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=SettingsMenuItem, Path=IsChecked}" Value="True">
<Setter Property="IsChecked" Value="False" />
</DataTrigger>
<DataTrigger Binding="{Binding ElementName=SyncMenuItem, Path=IsChecked}" Value="True">
<Setter Property="IsChecked" Value="False" />
</DataTrigger>
</Style.Triggers>
</Style>
</MenuItem.Style>
</MenuItem>
<MenuItem x:Name="SettingsMenuItem" Header="Settings" IsCheckable="True" Command="{Binding ViewSettingsCommand}">
<MenuItem.Style>
<Style TargetType="MenuItem">
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=ChangesMenuItem, Path=IsChecked}" Value="True">
<Setter Property="IsChecked" Value="False" />
</DataTrigger>
<DataTrigger Binding="{Binding ElementName=SyncMenuItem, Path=IsChecked}" Value="True">
<Setter Property="IsChecked" Value="False" />
</DataTrigger>
</Style.Triggers>
</Style>
</MenuItem.Style>
</MenuItem>
<MenuItem x:Name="SyncMenuItem" Header="Sync" IsCheckable="True" Command="{Binding ViewSyncCommand}">
<MenuItem.Style>
<Style TargetType="MenuItem">
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=ChangesMenuItem, Path=IsChecked}" Value="True">
<Setter Property="IsChecked" Value="False" />
</DataTrigger>
<DataTrigger Binding="{Binding ElementName=SettingsMenuItem, Path=IsChecked}" Value="True">
<Setter Property="IsChecked" Value="False" />
</DataTrigger>
</Style.Triggers>
</Style>
</MenuItem.Style>
</MenuItem>
</MenuItem>
答案 0 :(得分:0)
我有一个根据选择而改变的标题,所以我决定绑定到该属性。
<Menu>
<MenuItem Header="{Binding Header}">
<MenuItem x:Name="ChangesMenuItem" Header="Changes" IsCheckable="True" Command="{Binding ViewChangesCommand}">
<MenuItem.Style>
<Style TargetType="MenuItem">
<Setter Property="IsChecked" Value="False"/>
<Style.Triggers>
<DataTrigger Binding="{Binding Header}" Value="Changes">
<Setter Property="IsChecked" Value="True"/>
</DataTrigger>
</Style.Triggers>
</Style>
</MenuItem.Style>
</MenuItem>
<MenuItem x:Name="SettingsMenuItem" Header="Settings" IsCheckable="True" Command="{Binding ViewSettingsCommand}">
<MenuItem.Style>
<Style TargetType="MenuItem">
<Setter Property="IsChecked" Value="False"/>
<Style.Triggers>
<DataTrigger Binding="{Binding Header}" Value="Settings">
<Setter Property="IsChecked" Value="True"/>
</DataTrigger>
</Style.Triggers>
</Style>
</MenuItem.Style>
</MenuItem>
<MenuItem x:Name="SyncMenuItem" Header="Sync" IsCheckable="True" Command="{Binding ViewSyncCommand}">
<MenuItem.Style>
<Style TargetType="MenuItem">
<Setter Property="IsChecked" Value="False"/>
<Style.Triggers>
<DataTrigger Binding="{Binding Header}" Value="Sync">
<Setter Property="IsChecked" Value="True"/>
</DataTrigger>
</Style.Triggers>
</Style>
</MenuItem.Style>
</MenuItem>
</MenuItem>
</Menu>