使用绑定到 List<UserControl>我该怎么做才能不显示控件 [英] Using binding to a List&lt;UserControl&gt; how can I do for not showing the controls

问题描述

这是我正在使用的代码:

This is the code which I'm working:

<TextBlock TextWrapping="Wrap" Text="{Binding Objective}" Grid.Column="0" VerticalAlignment="Center" FontWeight="Bold" />
<ItemsControl ItemsSource="{Binding Problems}">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <Rectangle Stroke="Black" Height="20" Width="20" Margin="1,0" />
        </DataTemplate>
    </ItemsControl.ItemTemplate>

当将 ItemsSource 设置为 listBox 时.它包含:

When set ItemsSource to listBox. It contains:

List<Container>
(Below container properties)
    - Objective: string
    - Problems: List<UserControls>

看这一行:<ItemsControl ItemsSource="{Binding Problems}" >在代码中，Problems 是一个 UserControls 列表.当我加载程序时，列表框显示来自用户控件的控件，它应该显示矩形.

Look at this line: <ItemsControl ItemsSource="{Binding Problems}" > In the code, Problems is a list of UserControls. When I load the program, the listbox is showing the controls from the user control and it's supposed to show the rectangle.

我做错了什么?

推荐答案

查看 Visual Studio 的输出窗口，您会看到:

Look at the Output-window of Visual Studio and you will see this:

System.Windows.Data 错误:26:ItemTemplate 和 ItemTemplateSelector 对于已经属于 ItemsControl 的容器类型的项目被忽略；Type='XXX'

System.Windows.Data Error: 26 : ItemTemplate and ItemTemplateSelector are ignored for items already of the ItemsControl's container type; Type='XXX'

它不应用模板，因为可以直接添加项目.

It does not apply the template as the Items can be added directly.

我关于包装控件的意思是您创建一个类来保存 UserControl 的属性，例如:

What i meant about wrapping your controls is that you create a class which holds a property for the UserControl, e.g.:

 Problems : List<ProblemContainer>

public class ProblemContainer
{
    public UserControl Problem { get; set; }
}

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