3

I have a UserControl that contains two ContentControls that need to have different UserControl Views bound to them at runtime. The attached-Property solution noted here does not seem to work in Silverlight. Or, I am doing something wrong. I also, found this, but it did not bring any joy either.

I had a single ContentControl working by naming it 'ActiveItem'. But, of course, I cannot have two ContentControls with the same name.

Thanks in advance for any help,

Jim

4

2 回答 2

5

只需在主视图模型上公开两个公共属性，每个都是您希望显示的视图模型类型的实例。然后，在你看来有一个ContentControl具有相应名称的。例如：

public class MyMainViewModel
{
  private NavigationViewModel navigation;
  private MyContentViewModel main;

  public MyMainViewModel()
  {
    // better to inject factories using constructor injection here
    this.Navigation = new NavigationViewModel();
    this.Main = new MyContentViewModel();
  }

  public NavigationViewModel Navigation
  {
    get { return navigation; }
    set { navigation= value; NotifyOfPropertyChanged(() => this.Navigation); }
  }

  public MyContentViewModel Main
  {
    get { return main; }
    set { main= value; NotifyOfPropertyChanged(() => this.Main); }
  }

  ...
}

<ContentControl x:Name="Navigation" />
...
<ContentControl x:Name="Main" />
于 2011-08-01T12:34:20.553 回答
0

这是一个老问题，但如果有人遇到同样的问题，我在这里发布我从一开始就以更彻底的方式处理它的方式：

  1. 包含两个（甚至两个以上）用户控件的主窗口必须继承自Caliburn.Micro.Conductor<Screen>.Collection.AllActive;
  2. 您的用户控件必须继承自Caliburn.Micro.Screen；
  3. 您还必须牢记命名约定。如果在 View 中使用MenuUC作为 ContentControl 的名称，还要在 ViewModel 中创建一个名为MenuUC的属性；
  4. 像在构造函数中一样初始化您的 UserControl；
  5. 现在您可以在代码中的任何地方使用ActivateItem(MenuUC)和。DeactivateItem(MenuUC)Caliburn.Micro 会自动检测您要使用哪一个。

示例 XAML 查看代码：

<Window x:Class="YourProject.Views.YourView"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d"
        Title="YourViewTitle" Width="900" Height="480">

    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="4*"/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!-- Menu Side Bar -->
        <ContentControl Grid.Row="0" Grid.Column="0" x:Name="MenuUC" />

        <!-- Panel -->
        <Border Grid.Column="1" Grid.RowSpan="2" BorderThickness="1,0,0,0" BorderBrush="#FF707070" >
            <ContentControl x:Name="PanelUC" />
        </Border>
    </Grid>
</Window>

示例 C# ViewModel 代码：

class YourViewModel : Conductor<Screen>.Collection.AllActive
{
    // Menu Side Bar
    private MenuUCViewModel _menuUC;
    public MenuUCViewModel MenuUC
    {
        get { return _menuUC; }
        set { _menuUC = value; NotifyOfPropertyChange(() => MenuUC); }
    }

    // Panel
    private Screen _panelUC;
    public Screen PanelUC
    {
        get { return _panelUC; }
        set { _panelUC = value; NotifyOfPropertyChange(() => PanelUC); }
    }

    // Constructor
    public YourViewModel()
    {
        MenuUC = new MenuUCViewModel();
        ActivateItem(MenuUC);

        PanelUC = new FirstPanelUCViewModel();
        ActivateItem(PanelUC);
    }

    // Some method that changes PanelUC (previously FirstPanelUCViewModel) to SecondPanelUCViewModel
    public void ChangePanels()
    {
        DeactivateItem(PanelUC);
        PanelUC = new SecondPanelUCViewModel();
        ActivateItem(PanelUC);
    }
}

在上面的示例中，ChangePanels()充当将新用户控件加载到 ContentControl 中的方法。

另请阅读此问题，它可能会对您有所帮助。

于 2020-05-30T16:39:46.137 回答