如何在 xaml 中对公共属性进行数据绑定 [英] How to databind public property in xaml

问题描述

我要做的就是将公共属性绑定到 textBlock.我在这里做错了什么?

All I am trying to do is bind a public property to a textBlock. What am I doing wrong here?

namespace WpfApplication1
{

    public partial class MainWindow : Window
    {

        public string test { get; set; }

        public MainWindow()
        {
            test = "this is a test";
            InitializeComponent();
        }
    }
}

<Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
<Window.Resources>
    <ObjectDataProvider x:Key="test"></ObjectDataProvider>
</Window.Resources>
<Grid>
    <TextBlock Height="23" HorizontalAlignment="Left" Margin="108,58,0,0" Name="textBlock1"  VerticalAlignment="Top" Text="{Binding Source={StaticResource test}}" />
</Grid>

推荐答案

您可以简单地添加数据上下文并访问您的属性

You can simply add a datacontext and access your property

public partial class MainWindow : Window,INotifyPropertyChanged
{
    private string _test;
    public string test
    {
        get
        {
            return _test;
        }
        set
        {
            _test = value;
            OnPropertyChanged("test");
        }
    }
    public MainWindow()
    {
        test = "this is a test";
        InitializeComponent();
        DataContext = this;
    }

    public event PropertyChangedEventHandler PropertyChanged;
    private void OnPropertyChanged(String name)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(name));
        }
    }
}
        <TextBlock Height="23" HorizontalAlignment="Left" Margin="108,58,0,0" Name="textBlock1"  VerticalAlignment="Top" Text="{Binding test}"/>

有关何时使用 ObjectDataProvider 的详细信息，另请查看此帖子

Also check this post for details of when to use an ObjectDataProvider

http://bea.stollnitz.com/blog/?p=22

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