• WPF中ElementName与RelativeSource绑定的局限性以及对策


    完全来源于十月的寒流,感谢大佬讲解

    <Window x:Class="Test_01.MainWindow"
            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"
            xmlns:local="clr-namespace:Test_01"
            mc:Ignorable="d"
            Title="MainWindow" Height="450" Width="800">
        <StackPanel>
            <TextBlock Text="{Binding ElementName=txt, Path=Text, StringFormat='Input: {0}'}" FontSize="30"></TextBlock>
            <TextBlock Text="{Binding RelativeSource={RelativeSource AncestorType=StackPanel}, Path=Children[2].Text, StringFormat='Input: {0}'}" FontSize="30"></TextBlock>
            <TextBox x:Name="txt" FontSize="30"></TextBox>
        </StackPanel>
    </Window>
    
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    RelativeSource解析不到

    <Window x:Class="Test_01.MainWindow"
            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"
            xmlns:local="clr-namespace:Test_01"
            mc:Ignorable="d"
            Title="MainWindow" Height="450" Width="800" Loaded="Window_Loaded">
        <StackPanel x:Name="Spanel">
            <TextBlock Text="{Binding ElementName=txt, Path=Text, StringFormat='Input: {0}'}" FontSize="30"></TextBlock>
            <TextBlock Text="{Binding RelativeSource={RelativeSource AncestorType=StackPanel}, Path=Children[2].Text, StringFormat='Input: {0}'}" FontSize="30"></TextBlock>
            <!--<TextBox x:Name="txt" FontSize="30"></TextBox>-->
        </StackPanel>
    </Window>
    
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    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows;
    using System.Windows.Controls;
    using System.Windows.Data;
    using System.Windows.Documents;
    using System.Windows.Input;
    using System.Windows.Media;
    using System.Windows.Media.Imaging;
    using System.Windows.Navigation;
    using System.Windows.Shapes;
    
    namespace Test_01
    {
        /// 
        /// MainWindow.xaml 的交互逻辑
        /// 
        public partial class MainWindow : Window
        {
            public MainWindow()
            {
                InitializeComponent();
            }
    
            private void Window_Loaded(object sender, RoutedEventArgs e)
            {
                var box = new TextBox
                {
                    Name = "txt",
                };
                this.RegisterName(box.Name, box);
                Spanel.Children.Add(box);
            }
        }
    
        public class MainWindowViewModel
        {
            public string Message { get; set; }
        }
    }
    
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    namescope详细了解下

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  • 原文地址:https://blog.csdn.net/zzyzxb/article/details/134317866