Question

我想将一个文本框绑在窗口的属性上, 该属性在文件后面的代码中定义。

当使用“ FindAsentor ” 设置相对源来查找窗口时, 当引用窗口时, 绑定成功。

为什么它不能用它的名字来称呼窗口, 就像我可以把窗口的“标题”属性绑起来一样?

<强>XAML:

<Window x:Class="WpfApplication123.MainWindow"
        x:Name="MyWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="WPF Binding Example" Height="180" Width="237">
<Grid>
    <TextBox Height="23" HorizontalAlignment="Left" Margin="24,24,0,0" Name="textBox1" VerticalAlignment="Top" Width="136"
             Text="{Binding ElementName=MyWindow, Path=Title}"/>
    <TextBox Height="23" HorizontalAlignment="Left" Margin="24,53,0,0" Name="textBox2" VerticalAlignment="Top" Width="136"
             Text="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Path=XYZ}"/>
    <TextBox Height="23" HorizontalAlignment="Left" Margin="24,82,0,0" Name="textBox3" VerticalAlignment="Top" Width="136"
             Text="{Binding ElementName=MyWindow, Path=XYZ}" />
  </Grid>
</Window>

后端 < 坚固 > 代码:

namespace WpfApplication123
{
  public partial class MainWindow : Window
  {
    public MainWindow()
    {
      InitializeComponent();
      XYZ = "XYZ!";
    }

    public string XYZ { get; set; }
  }
}

Answer 1

您可以设置这个。 DataContext = 这个, 然后绑在路径上。

你需要

XYZ = "XYZ";

初始化元件前

当文本框初始化 XYZ为空时

Answer 2

I never used a normal property, but my guess is you need to implement the INotifyPropertyChanged interface, and raise the property changed event in the setter of XYZ. The imho better approach is to use a dependency property directly.

只要让XYZ成为附属财产,它就应该起作用。

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