在选项卡式界面应用程序中,我尝试将 TabItem 标头字符串或所选 TabItem 中包含的对象传递到视图模型以使用它 发布这样的活动:
在视图中(xaml):
<TabControl x:Name="MyTC"
prism:RegionManager.RegionName="{x:Static inf:RegionNames.MainRegion}"
SelectedItem="{Binding Path=TabControlSelectedItem,UpdateSourceTrigger=PropertyChanged,Mode=Twoway}"
Cursor="Hand"
Grid.Row="0"
Grid.Column="1">
<TabControl.ItemTemplate>
<DataTemplate>
<!--DataContext="{Binding ElementName=MyTC, Path=SelectedItem}"-->
<StackPanel Orientation="Horizontal">
<TextBlock VerticalAlignment="Center"
Margin="3"
Text="{Binding Path=DataContext.DataContext.HeaderInfo, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type TabItem}}}"
/>
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseLeftButtonDown">
<i:InvokeCommandAction Command="{Binding HeaderClickCommand}"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</StackPanel>
</DataTemplate>
</TabControl.ItemTemplate>
</TabControl>
在视图模型中
//*************************** ******************************* *
//Constructor
public ShellWindowViewModel(IEventAggregator eventAggregator)
{
this.eventAggregator = eventAggregator;
this.HeaderClickCommand = new DelegateCommand(OnHeaderClick);
}
//SelectedItem Binding
private object tabControlSelectedItem;
public object TabControlSelectedItem
{
get { return tabControlSelectedItem; }
set
{
if (tabControlSelectedItem != value)
{
tabControlSelectedItem = value;
OnPropertyChanged("TabControlSelectedItem");
}
}
}
//*****************************************************************************************************
//this handler publish the Payload "SelectedSubsystem" for whoever subscribe to this event
private void OnHeaderClick()
{
//EA for communication between Modules not within Modules
string TabHeader = (TabControlSelectedItem as TabItem).Header.ToString();
eventAggregator.GetEvent<SubsystemIDSelectedEvent>().Publish(TabHeader);
}
但有问题,因为当我单击 TabItem 时没有任何反应,当我插入断点 @ TabControlSelectedItem 时 属性我发现它包含视图名称空间。我希望 TabControlSelectedItem 获取选定的选项卡标头字符串或中的对象 选定的选项卡项目。 非常感谢您的帮助。
我刚刚尝试了类似的方法,效果很好。
这是我的xaml
<TabControl ItemsSource="{Binding Matches}"
SelectedItem="{Binding SelectedRecipe}">
<TabControl.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0"
Text="{Binding Path=Date}" />
<TextBlock Grid.Column="1"
TextAlignment="Center"
Text="{Binding Path=Name}" />
</Grid>
</DataTemplate>
</TabControl.ItemTemplate>
</TabControl>
然后在我的视图模型中
public object SelectedRecipe
{
get
{
return _selectedRecipe;
}
set
{
_selectedRecipe = value;
OnNotifyPropertyChanged("SelectedRecipe");
}
}