[英]Binding ObservableCollection<T> ItemSource to DataGrid
[英]Binding Datagrid to ObservableCollection<T> in SIlverlight
我正在努力将DataGrid绑定到SIlverlight中的ObservableCollection。
我的非常简单的代码如下。 它目前显示一个空白的DataGrid。 我已经通过了教程等,我确信我遗漏了非常基本的东西。
主页XAML
<UserControl xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk" x:Class="Tower.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400">
<Grid x:Name="LayoutRoot">
<sdk:DataGrid Grid.Row="1" Margin="10" IsReadOnly="True" ColumnWidth="120" ItemsSource="{Binding Path=Tests, Mode=OneWay}" AllowDrop="True" />
</Grid>
主页代码背后:
public partial class MainPage : UserControl
{
public ObservableCollection<Test> Tests { get; set; }
public MainPage()
{
InitializeComponent();
DataContext = this;
Tests = new ObservableCollection<Test>();
Tests.Add(new Test() { Label = "Test1" });
Tests.Add(new Test() { Label = "Test2" });
Tests.Add(new Test() { Label = "Test3" });
Tests.Add(new Test() { Label = "Test4" });
}
}
测试类:
public class Test : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private String _Label;
public String Label
{
get
{
return _Label;
}
set
{
_Label = value;
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs("Label"));
}
}
}
您的代码中有两个问题 -
You can only bind with property
而不能You can only bind with property
字段。 所以首先使Test
属性。 其次,您需要将DataContext to self for
设置DataContext to self for
绑定工作。
public partial class MainPage : UserControl { public ObservableCollection<Test> Tests { get; set; } public MainPage() { InitializeComponent(); DataContext = this; Tests = new ObservableCollection<Test>(); Tests.Add(new Test() { Label = "Test1" }); Tests.Add(new Test() { Label = "Test2" }); Tests.Add(new Test() { Label = "Test3" }); Tests.Add(new Test() { Label = "Test4" }); } }
XAML -
<Grid x:Name="LayoutRoot">
<sdk:DataGrid Grid.Row="1" Margin="10" IsReadOnly="True" ColumnWidth="120"
ItemsSource="{Binding DataContext.Tests,
RelativeSource={RelativeSource FindAncestor,
AncestorType= UserControl}}" AllowDrop="True" />
</Grid>
注意propertyName - 它应该是Tests
而不是tests
。 这只是一个侧面说明,遵循Microsoft的命名惯例。 属性名称的第一个字母应始终为大写。
<Grid>
<DataGrid ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType=UserControl}, Path=Tests}" />
</Grid>
不要忘记: PUBLIC ObservableCollection测试{get; 私人套装}
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