WP7 - 列表框绑定 [英] WP7 - listbox Binding

问题描述

我有一个 ObservableCollection 想绑定到我的列表框...

I have an ObservableCollection that I want to bind to my listbox...

lbRosterList.ItemsSource = App.ViewModel.rosterItemsCollection;

但是，在该集合中，我还有另一个集合:

However, in that collection I have another collection within it:

 [DataMember]
    public ObservableCollection<PersonDetail> ContactInfo
    {
        get
        {
            return _ContactInfo;
        }
        set
        {
            if (value != _ContactInfo)
            {
                _ContactInfo = value;
                NotifyPropertyChanged("ContactInfo");
            }
        }
    }

PersonDetail 包含 2 个属性:姓名和电子邮件

PersonDetail contains 2 properties: name and e-mail

我希望列表框为 rosterItemsCollection 中的每个项目都有这些值

I would like the listbox to have those values for each item in rosterItemsCollection

RosterId = 0;
RosterName = "test";
ContactInfo.name = "Art";
ContactInfo.email = "[e-mail]";

RosterId = 0;
RosterName = "test"
ContactInfo.name = "bob";
ContactInfo.email = "[e-mail]";

RosterId = 1;
RosterName = "test1"
ContactInfo.name = "chris";
ContactInfo.email = "[e-mail]";

RosterId = 1;
RosterName = "test1"
ContactInfo.name = "Sam";
ContactInfo.email = "[e-mail]";

我希望列表框显示 ContactInfo 信息.

I would like that listboxes to display the ContactInfo information.

我希望这是有道理的...

I hope this makes sense...

我尝试过但收效甚微的 XAML:

My XAML that I've tried with little success:

<listbox x:Name="lbRosterList" ItemsSource="rosterItemCollection">
<textblock x:name="itemText" text="{Binding Path=name}"/>

我做错了什么?

推荐答案

将您的绑定路径更改为:

Change your Binding Path to this:

<ListBox x:Name="lbRosterList" DataContext="{Binding}" ItemsSource="{Binding rosterItemCollection}">
<TextBlock x:Name="itemText" Text="{Binding Path=ContactInfo.name}"/>

然后在您的代码中执行此操作(在页面构造函数中的 InitializeComponents 之后):

Then in your code do this (after InitializeComponents in the page constructor):

lbRosterList.DataContext = App.ViewModel;

Charles Petzold 着的这本免费书籍中对此类事情的出色参考:章节第 12 页，第 363 页.

Excellent reference for this kind of thing in this free book by Charles Petzold: Chapter 12, pg 363.

您还可以从列表框中删除 DataContext 属性并设置页面本身的 DataContext.如果您创建了一个新的数据绑定应用程序，您将通过默认示例了解我的意思.

You can also remove the DataContext attribute from the listbox and set the DataContext of the page itself. If you create a new databound application, you will see what I mean with their default example.

这篇关于WP7 - 列表框绑定的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！