将绑定对象直接传递到DataTemplate项
本文关键字:DataTemplate 绑定 对象 | 更新日期: 2023-09-27 17:54:29
我有一个JSection
对象的集合Items
,我传递给LongListMultiSelector
。我想直接将每个JSection
传递到每个controls:Section
。我该怎么做呢?
<toolkit:LongListMultiSelector ItemsSource="{Binding Items}">
<toolkit:LongListMultiSelector.ItemTemplate>
<DataTemplate>
<controls:Section Data="{Binding}" />
</DataTemplate>
</toolkit:LongListMultiSelector.ItemTemplate>
</toolkit:LongListMultiSelector>
UserControl,包含XAML与LongListMultiSelector
:
namespace Controls
{
public partial class RemoteHomePage : UserControl
{
public ObservableCollection<JSection> Items { get; set; }
public RemoteHomePage()
{
Items = new ObservableCollection<JSection> { };
Items.Add(new JSection { id = 2, name = "Section 2" });
Items.Add(new JSection { id = 1, name = "Section 1" });
Items.Add(new JSection { id = 3, name = "Section 3" });
InitializeComponent();
}
}
}
Section
class:
namespace Controls
{
public partial class Section : UserControl
{
public JSection Data { get; set; }
public Section()
{
InitializeComponent();
}
}
}
我得到的异常:
An exception of type 'System.ArgumentException' occurred in mscorlib.ni.dll and wasn't handled before a managed/native boundary
An exception of type 'System.IO.FileNotFoundException' occurred in Unknown Module. and wasn't handled before a managed/native boundary
An exception of type 'MS.Internal.NativeParseException' occurred in Unknown Module. and wasn't handled before a managed/native boundary
An exception of type 'System.Exception' occurred in Unknown Module. and wasn't handled before a managed/native boundary
经过一番搜索,我发现我根本不需要设置任何显式绑定,每个JSection
将是每个Section
的DataContext
。
下面的代码运行良好,不会产生异常:
<toolkit:LongListMultiSelector ItemsSource="{Binding Items}">
<toolkit:LongListMultiSelector.ItemTemplate>
<DataTemplate>
<controls:Section />
</DataTemplate>
</toolkit:LongListMultiSelector.ItemTemplate>
</toolkit:LongListMultiSelector>
您可以将任何集合绑定为LongListSelector。ItemSource =集合任意ListElement[i]的Datacontext将自动设置为对应的Collection[i]元素