如何在WPF控制元件上繫結本地屬性

我有兩個WPF控制元件

<Button HorizontalAlignment="Center"
Name="btnChange"
Click="btnChange_Click"
Content="Click Me" />

<Label Name="lblCompanyId"
HorizontalAlignment="Center"
DataContext="{Binding ElementName=_this}"
Content="{Binding Path=CompanyName}" />

我們可以看到標籤繫結到本地屬性(在程式碼後面),當我點選按鈕時,我沒有看到任何值的標籤

以下是我的程式碼背後…

public static readonly DependencyProperty CompanyNameProperty =
DependencyProperty.Register("CompanyName", typeof(string), typeof(Window3), new UIPropertyMetadata(string.Empty));

public string CompanyName {
get { return (string)this.GetValue(CompanyNameProperty); }
set { this.SetValue(CompanyNameProperty, value); }
}

private void btnChange_Click(object sender, RoutedEventArgs e) {
this.CompanyName = "This is new company from code beind";
}

問候,

嘗試

Content="{Binding ElementName=_this, Path=CompanyName}"

沒有DataContext繫結

編輯

我的程式碼沒有問題,將你的視窗命名為x：Name =“_ this”？

<Window x:Class="WpfStackOverflowSpielWiese.Window3"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window3"
Height="300"
Width="300"
x:Name="_this">
<Grid>
<StackPanel>
<Button HorizontalAlignment="Center"
Name="btnChange"
Click="btnChange_Click"
Content="Click Me" />

<Label Name="lblCompanyId"
HorizontalAlignment="Center"
DataContext="{Binding ElementName=_this}"
Content="{Binding Path=CompanyName}"></Label>

</StackPanel>
</Grid>
</Window>

你的視窗真的是Window3嗎？

public partial class Window3 : Window
{
public Window3() {
this.InitializeComponent();
}

public static readonly DependencyProperty CompanyNameProperty =
DependencyProperty.Register("CompanyName", typeof(string), typeof(Window3), new UIPropertyMetadata(string.Empty));

public string CompanyName {
get { return (string)this.GetValue(CompanyNameProperty); }
set { this.SetValue(CompanyNameProperty, value); }
}

private void btnChange_Click(object sender, RoutedEventArgs e) {
this.CompanyName = "This is new company from code beind";
}
}

希望有所幫助