Question

所以，我正在尝试对我拥有的自定义组件执行一些数据绑定，但我似乎无法找到有关如何执行此操作的任何有用的信息。我想要做的是让主窗口中的自定义组件具有Bindning属性...

<local:MultiColumnComboBox ItemsSource="{Binding Customers}" x:Name="NewCombo"></local:MultiColumnComboBox>

然后在自定义组件中......

<DataGrid ItemsSource="{Binding ItemsSource}" Name="dataGrid"></DataGrid>

如果有人知道如何做到这一点，我们将不胜感激一些指导：）

修改

 public static readonly DependencyProperty ItemsSourceProperty =
DependencyProperty.Register("ItemsSource", typeof(IList<Customer>), typeof(MultiColumnComboBox));
public MultiColumnComboBox()
{
    InitializeComponent();
}
//Items Source Binding
public IList<Customer> ItemsSource
{
    get 
    { 
        return (IList<Customer>)GetValue(ItemsSourceProperty); 
    }
    set 
    {
        System.Console.WriteLine("Binding");
        System.Console.WriteLine(value);
        SetValue(ItemsSourceProperty, value);
    }
}

Answer 1

当我将错误的ownerType传递给DependencyProperty.Register方法时，我遇到了Binding错误...请检查以确保您使用的是typeof（MultiColumnComboBox），如下所示。

/// <summary>
/// Interaction logic for MultiColumnComboBox.xaml
/// </summary>
public partial class MultiColumnComboBox : UserControl
{
    /// <summary>
    /// This creates the dependency property for the collection to display.
    /// </summary>
    public static readonly DependencyProperty ItemsSourceProperty =
        DependencyProperty.Register("ItemsSource", typeof(IList<Customer>), typeof(MultiColumnComboBox));

    /// <summary>
    /// This property gets you to the collection that's being displayed.
    /// </summary>
    public IList<Customer> ItemsSource
    {
        get { return (IList<Customer>)GetValue(ItemsSourceProperty); }
        set { SetValue(ItemsSourceProperty, value); }
    }

    public MultiColumnComboBox()
    {
        InitializeComponent();
    }
}

另外，请确保在UserControl中设置Binding ElementName，使其具有正确的DataContext。

<UserControl x:Class="DependencyPropertyExample.MultiColumnComboBox"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Name="userControl1">
    <Grid>
        <DataGrid ItemsSource="{Binding Path=ItemsSource, ElementName=userControl1}" />
    </Grid>
</UserControl>

Answer 2

我已经明白了！

您所要做的就是使用控件中的DataContext属性，以便在主页面中使用..

<local:custom control DataContext="{Binding Something}" />

在你的自定义控件中，我绑定了......

ItemsSource="{Binding DataContext, ElementName=UOMControl}"

就是这样。

WPF自定义组件Datagrid绑定

2 个答案: