当绑定源更改时，FlowDocumentReader Document 不会收到通知，为什么？
所以我在 .xaml 文件中有这个 XAML
<StackPanel>
<Button Width="200" Height="30" Content="Change Words"
Click="Button_Click"/>
<FlowDocumentReader
ViewingMode="Scroll" Zoom="90"
Focusable="True"
Background="White"
IsFindEnabled="True"
IsPageViewEnabled="True"
IsScrollViewEnabled="True"
x:Name="FDR"
Document="{Binding Path=WordDocument}"
Width="400" Height="400">
</FlowDocumentReader>
</StackPanel>
在后面的代码中， 加载时，
public partial class Window1 : Window
{
MyDoc _myDoc = null;
FlowDocument _theFlowDocument;
public Window1()
{
InitializeComponent();
_myDoc = new MyDoc().Create(); // Create returns MyDoc, that has a WordDocument property with some FlowDocument contents
this.DataContext = _myDoc ;
}
private void Button_Click(object sender, RoutedEventArgs e)
{
_myDoc.WordDocument = _myDoc.CreateFlowDocument("Now it's changed");
}
}
单击按钮时，我正在更改 WordDocument 的内容。 CreateFlowDocument 使用传递的字符串创建一个 Paragraph 和一个 Run。
单击按钮时，FlowDocumentReader 不显示更改的内容，尽管我已将其绑定到 WordDocument 属性
我做错了什么？
So I have this XAML in the .xaml file
<StackPanel>
<Button Width="200" Height="30" Content="Change Words"
Click="Button_Click"/>
<FlowDocumentReader
ViewingMode="Scroll" Zoom="90"
Focusable="True"
Background="White"
IsFindEnabled="True"
IsPageViewEnabled="True"
IsScrollViewEnabled="True"
x:Name="FDR"
Document="{Binding Path=WordDocument}"
Width="400" Height="400">
</FlowDocumentReader>
</StackPanel>
And in the code behind,
On load,
public partial class Window1 : Window
{
MyDoc _myDoc = null;
FlowDocument _theFlowDocument;
public Window1()
{
InitializeComponent();
_myDoc = new MyDoc().Create(); // Create returns MyDoc, that has a WordDocument property with some FlowDocument contents
this.DataContext = _myDoc ;
}
private void Button_Click(object sender, RoutedEventArgs e)
{
_myDoc.WordDocument = _myDoc.CreateFlowDocument("Now it's changed");
}
}
On button click, I am changing the contents of the WordDocument. The CreateFlowDocument creates a Paragraph and a Run with the string passed.
When button is clicked, the FlowDocumentReader doesn't show the changed contents, although I've bound it to the WordDocument property
What am I doing wrong?
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如何实现
WordDocument属性？ 它要么需要是一个依赖属性，要么您需要实现 INotifyPropertyChanged 并在更改属性值时相应地引发PropertyChanged 事件，或者您需要添加一个WordDocumentChanged事件添加到您的类中，并在您更改值时引发该事件。 如果它只是一个普通属性，则绑定表达式无法检测值在运行时何时发生变化。How do you implement
WordDocumentproperty? It either needs to be a dependency property, or you need to implementINotifyPropertyChangedand raisePropertyChangedevent accordingly when you change the property value, or you need to add aWordDocumentChangedevent to your class and raise that when you change the value. If it's just a plain property, there's no way for binding expression to detect when the value changes at run-time.