WPF Datagrid绑定不显示值

Question

我与WPF完全混淆,我尝试在WPF中绑定到datagrid

这是XAML代码

<Grid x:Name="LayoutRoot">
    <Grid HorizontalAlignment="Left" Height="440" VerticalAlignment="Top" Width="632">
        <DataGrid HorizontalAlignment="Left" Height="420" Margin="10,10,0,0" VerticalAlignment="Top" Width="603" ItemsSource="{Binding Source=MailCollection}" AutoGenerateColumns="False">
            <DataGrid.Columns>
                <DataGridTextColumn  Header="id" Binding="{Binding Id}"/>
                <DataGridTextColumn  Header="nazwa" Binding="{Binding Name}"/>
            </DataGrid.Columns>
        </DataGrid>
    </Grid>
</Grid>

这是MailTpl类

public class MailTpl
{
    public string Id { get; set; }
    public string Name { get; set; }
}

以下是我的约束方式

public partial class WindowDataGridTest : Window
{
    ObservableCollection<MailTpl> _MailCollection = new ObservableCollection<MailTpl>();

    public ObservableCollection<MailTpl> MailCollection { get { return _MailCollection; } }

    public WindowDataGridTest()
    {
        _MailCollection.Add(new MailTpl { Id= "abbb", Name = "badfasdf" });
        _MailCollection.Add(new MailTpl { Id = "asasdfasdfdf", Name = "basdfasdfaa" });
        this.InitializeComponent();

        // Insert code required on object creation below this point.
    }
}

我不知道为什么它不起作用.有线索吗？网格没有显示任何值.

Answer 1

只是对未来的建议.

Visual Studio - >选项 - >调试 - >输出窗口 - > WPF跟踪设置.在这里,您可以设置详细程度,并在Ouptut窗口中查看有关数据绑定的重要信息.它节省了我几个小时.

现在共鸣.您将MailCollection声明为Window的公共属性,但默认情况下会对DataContext进行绑定.

所以,你有两种方式:

this.DataContext = _MailCollection

并将绑定更改为

ItemsSource={Binding}

或者只是更改绑定到此:

ItemsSource="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Window}, Path=MailCollection}"

我也推荐这个pdf绑定备忘单.它缺少一些WPF 4.5功能,但仍然有用.