Question

我有一个userControl，其中包含一个文本块和一个文本框，但是我一直试图通过DependencyProperties将参数传递给它。

这是一些东西：

userControl XAML：

<UserControl x:Class="WpfApp1.Controls.InfoField"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:WpfApp1.Controls"
             mc:Ignorable="d" 
             DataContext="{Binding RelativeSource={RelativeSource Self}}"
             >
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"></ColumnDefinition>
            <ColumnDefinition Width="Auto"></ColumnDefinition>

        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"></RowDefinition>

        </Grid.RowDefinitions>
        <DockPanel>
            <TextBlock Text="{Binding TextInBlock}" HorizontalAlignment="Right" Margin="2" Width="160"></TextBlock>
            <TextBox Text="{Binding BindingInBox}" Grid.Column="1" Width="200" Margin="2"></TextBox>
        </DockPanel>
    </Grid>
</UserControl>

后面的相关代码：

using System.Windows;
using System.Windows.Controls;

namespace WpfApp1.Controls
{
    /// <summary>
    /// Logique d'interaction pour InfoField.xaml
    /// </summary>
    public partial class InfoField : UserControl
    {
        public static readonly DependencyProperty TextInBlockProperty =
            DependencyProperty.Register("TextInBlock", typeof(string), typeof(TextBlock));


        public static readonly DependencyProperty BindingInBoxProperty =
            DependencyProperty.Register("BindingInBox", typeof(string), typeof(TextBox));

        public string TextInBlock
        {
            get => (string) GetValue(TextInBlockProperty);
            set => SetValue(TextInBlockProperty, value);

        }

        public string BindingInBox
        {
            get => (string)GetValue(BindingInBoxProperty);
            set => SetValue(BindingInBoxProperty, value);

        }
        public InfoField()
        {
            InitializeComponent();
            this.DataContext = this;

        }
    }
}

和MainWindow XAML：

 <Grid ColumnSpan="4" Row="1" Name="detailsGrid" 
              DataContext="{Binding ElementName=listBoxBooks,Path=SelectedItem}">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"></ColumnDefinition>
                <ColumnDefinition Width="Auto"></ColumnDefinition>
                <ColumnDefinition Width="Auto"></ColumnDefinition>
                <ColumnDefinition Width="Auto"></ColumnDefinition>
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"></RowDefinition>
                <RowDefinition Height="Auto"></RowDefinition>
                <RowDefinition Height="Auto"></RowDefinition>
            </Grid.RowDefinitions>
------>     <controls:InfoField Grid.ColumnSpan="2" BindingInBox="{Binding Author,ElementName=mainWindow}" TextInBlock="Auteur :"></controls:InfoField> 
            <Button Grid.Row="0" Grid.Column="2" Click="ButtonBase_OnClick">Click me!</Button>

            <TextBlock Text="Titre :" HorizontalAlignment="Right" Grid.Row="1"></TextBlock>
            <TextBox Text="{Binding Title}" Grid.Column="1" Grid.Row="1" Width="200"></TextBox>

        </Grid>

目前，Visual Studio在我放置文本箭头的行上给我一个错误；错误显示：“'TextInBlock'属性已由'TextBlock'注册”。我不明白此错误消息。请注意，这两个绑定之间有区别，一个绑定引用另一个字段（也通过绑定，该字段为“作者”），而另一个绑定只是一个简单的字符串。

谢谢。

WPF数据绑定和DependencyProperties

0 个答案: