Question

我有以下类/ XAML来定义我的标签（如果重要的话，使用SimpleMVVM）：

标签界面

public interface ITabViewModel
{
    String Header { get; set; }
    Visibility Visibility { get; set; }

    void TabSelected();

}

标签VM

  public class TabsViewModel : ViewModelBase<TabsViewModel>
    {
        #region Properties

        public ObservableCollection<ITabViewModel> Tabs { get; set; }

        public object SelectedTabViewModel 
        {
            get
            {
                if (this._SelectedTabViewModel == null)
                {
                    _SelectedTabViewModel = Tabs[0];
                }

                return _SelectedTabViewModel;
            }
            set
            {
                if (this._SelectedTabViewModel != value)
                {
                    this._SelectedTabViewModel = value;
                    NotifyPropertyChanged(m => m.SelectedTabViewModel);
                }
            }
        }
        private object _SelectedTabViewModel;


        #endregion Properties

        #region Constructors

        // Default ctor
        public TabsViewModel() 
        {
            Tabs = new ObservableCollection<ITabViewModel>();

            Tabs.Add((App.Current.Resources["Locator"] as ViewModelLocator).PropertiesViewModel);
            Tabs.Add((App.Current.Resources["Locator"] as ViewModelLocator).SystemSetupViewModel);

        }
}

标签UserControl

<UserControl x:Class="AutomatedSQLMigration.Views.TabsUserControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:v="clr-namespace:AutomatedSQLMigration.Views"
             xmlns:vm="clr-namespace:AutomatedSQLMigration.ViewModels"
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300"

             DataContext="{Binding TabsViewModel, Source={StaticResource Locator}}">

    <TabControl ItemsSource="{Binding Tabs}"
                SelectedItem="{Binding SelectedTabViewModel}">

        <TabControl.Resources>
            <DataTemplate DataType="{x:Type vm:PropertiesViewModel}">
                <v:PropertiesUserControl />
            </DataTemplate>


            <DataTemplate DataType="{x:Type vm:SystemSetupViewModel}">
                <v:SystemSetupUserControl />
            </DataTemplate>
        </TabControl.Resources>

        <TabControl.ItemContainerStyle>
            <Style TargetType="TabItem">
                <Setter Property="Header" Value="{Binding Header}" />
                <Setter Property="Width" Value="120" />
            </Style>

        </TabControl.ItemContainerStyle>

    </TabControl>

</UserControl>

属性VM

...
        public void TabSelected()
        {
            Log.Write(LogLevel.Debug, "Selected tab 'Rules'");
        }
...

我想将其连接起来，以便在选择选项卡时，为选定的选项卡触发TabSelected（）方法。有人可以举例说明如何做到这一点吗？

我找到了另一个提及此方法的post：

TabItem item = new TabItem();
MyCustomControl mcc = new MyCustomControl();
item.Content = mcc;

Selector.AddSelectedHandler(item, (s,e) =>
{
    selectedControl = mcc;
});

但我不确定如何实现这个？我会将它应用于TabControl VM还是每个用户控制VM？

Answer 1

如何在所选标签设置器中添加该行：

this._SelectedTabViewModel.TabSelected();

选择选项卡时执行方法

1 个答案: