这不是 MVVM.您不应该在视图模型中创建 UI 元素.

This isn't MVVM. You should not be creating UI elements in your view model.

您应该将选项卡的 ItemsSource 绑定到您的 ObservableCollection，并且该模型应该包含有关应创建的选项卡的信息.

You should be binding the ItemsSource of the Tab to your ObservableCollection, and that should hold models with information about the tabs that should be created.

这里是虚拟机和代表标签页的模型:

Here are the VM and the model which represents a tab page:

public sealed class ViewModel
{
    public ObservableCollection<TabItem> Tabs {get;set;}
    public ViewModel()
    {
        Tabs = new ObservableCollection<TabItem>();
        Tabs.Add(new TabItem { Header = "One", Content = "One's content" });
        Tabs.Add(new TabItem { Header = "Two", Content = "Two's content" });
    }
}
public sealed class TabItem
{
    public string Header { get; set; }
    public string Content { get; set; }
}

这是绑定在窗口中的外观:

And here is how the bindings look in the window:

<Window x:Class="WpfApplication12.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Window.DataContext>
        <ViewModel
            xmlns="clr-namespace:WpfApplication12" />
    </Window.DataContext>
    <TabControl
        ItemsSource="{Binding Tabs}">
        <TabControl.ItemTemplate>
            <!-- this is the header template-->
            <DataTemplate>
                <TextBlock
                    Text="{Binding Header}" />
            </DataTemplate>
        </TabControl.ItemTemplate>
        <TabControl.ContentTemplate>
            <!-- this is the body of the TabItem template-->
            <DataTemplate>
                <TextBlock
                    Text="{Binding Content}" />
            </DataTemplate>
        </TabControl.ContentTemplate>
    </TabControl>
</Window>

^{(注意，如果你想在不同的标签中使用不同的东西，使用 DataTemplates.每个标签的视图模型应该是它自己的类，或者创建一个自定义的 DataTemplateSelector> 选择正确的模板.)}

^{(Note, if you want different stuff in different tabs, use DataTemplates. Either each tab's view model should be its own class, or create a custom DataTemplateSelector to pick the correct template.)}

数据模板中的一个 UserControl:

A UserControl inside the data template:

<TabControl
    ItemsSource="{Binding Tabs}">
    <TabControl.ItemTemplate>
        <!-- this is the header template-->
        <DataTemplate>
            <TextBlock
                Text="{Binding Header}" />
        </DataTemplate>
    </TabControl.ItemTemplate>
    <TabControl.ContentTemplate>
        <!-- this is the body of the TabItem template-->
        <DataTemplate>
            <MyUserControl xmlns="clr-namespace:WpfApplication12" />
        </DataTemplate>
    </TabControl.ContentTemplate>
</TabControl>