[英]WPF bug: TextRange.GetPropertyValue in RichTextBox
I have to retrieve the Foreground property of the selected text in a WPF RichtTextBox, but I think, there is a bug in the TextRange.GetPropertyValue function. 我必须在WPF RichtTextBox中检索所选文本的Foreground属性,但我认为TextRange.GetPropertyValue函数中存在错误。 I've written a simple application to test the error:
我编写了一个简单的应用程序来测试错误:
<RichTextBox x:Name="rtfBox">
<RichTextBox.Document>
<FlowDocument>
<Paragraph>
<Run>run run run</Run>
<Hyperlink TargetName="http://stackoverflow.com">stackoverflow.com</Hyperlink>
</Paragraph>
</FlowDocument>
</RichTextBox.Document>
</RichTextBox>
<Button Content="Click!" Height="28" Click="Button_Click" />
And in the code behind: 并在后面的代码中:
private void Button_Click(object sender, RoutedEventArgs e)
{
var textrange = new TextRange(rtfBox.Selection.Start, rtfBox.Selection.End);
var propertyValue = textrange.GetPropertyValue(TextElement.ForegroundProperty);
MessageBox.Show(propertyValue.ToString());
}
When I select the first few characters of the stackoverflow hyperlink, the MessageBox says that the Foreground property is a DependencyProperty.UnsetValue, but when I select other parts of the link, it shows the true foreground color. 当我选择stackoverflow超链接的前几个字符时,MessageBox会说Foreground属性是DependencyProperty.UnsetValue,但是当我选择链接的其他部分时,它将显示真正的前景色。
It looks like a bug. 看起来像个错误。
Are there any workaround for this problem? 有没有解决此问题的方法?
It's because of the TextElement.ForegroundProperty. 这是因为TextElement.ForegroundProperty。 If you change it to
Hyperlink.ForegroundProperty
, it will show the true value. 如果将其更改为
Hyperlink.ForegroundProperty
,它将显示真实值。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.