绑定后如何向ItemsControl添加更多项目 [英] How to add more items to ItemsControl after binding

问题描述

在我的 C# windows 手机应用程序中，我创建了一个绑定来将字符串列表绑定到 ItemsControl.

In my C# windows phone app, I create a binding to bind a list of string to ItemsControl.

// MyCollections is a List<string>

<ItemsControl x:Name="ContentRoot" ItemsSource="{Binding MyCollections}">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <TextBox Text="{Binding }" />
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

它有效.但我的问题是如何在绑定后将我自己的项目(例如单击以添加更多")添加到此 ItemsControl 中?

It works. But My question is how can I add my own item (e.g. 'Click to add more') to this ItemsControl after it is binded?

推荐答案

这个问题有两个答案:

1. 使用 ObservableCollection 而不是 List，因为它会在添加/删除项目时通知 UI.然后你只需将你的新项目添加到视图模型的列表中.

1. Use an ObservableCollection instead of a List, as it will notify the UI when items are added/removed from it. Then you just add your new item to the list in the view model.

使用 CompositeCollection 以便您可以拥有附加"项目而无需修改实际集合.

Use a CompositeCollection so you can have the "additional" item without modifying the actual collection.

通常你会做 1，但因为你想要一个点击添加更多"类型的选项，CompositeCollection 可能是要走的路.

Normally you would do 1, but since you want a "Click to add more" type of option, CompositeCollection is probably the way to go.

既然您提到了 windows phone(但标记了 WPF)，您可能想查看这篇文章以了解如何编写自己的 CompositeCollection 对象:如何在 WP8 中做一个 CompositeCollection?

Since you metioned windows phone (but tagged WPF) you may want to look at this post for how to write your own CompositeCollection object: how to do a CompositeCollection in WP8?

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