WPF中, 启用添加到RichTextBox中的控件
周银辉
WPF中RichTextBox的确非常的强大, 但让人很郁闷的是:添加到其中的控件总是被禁用的(IsEnabled始终为false)
参考以下代码:
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="LearnWPF - Changing Elements with Styles"
Width="350" Height="200">
<RichTextBox >
<!-- regular FlowDocument -->
<FlowDocument FontFamily="Segoe" FontSize="12" >
<Paragraph>This is some text inside a flowdocument</Paragraph>
<BlockUIContainer>
<Button Content="Click Me?" IsEnabled="True">
</Button>
</BlockUIContainer>
</FlowDocument>
</RichTextBox>
</Window>
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="LearnWPF - Changing Elements with Styles"
Width="350" Height="200">
<RichTextBox >
<!-- regular FlowDocument -->
<FlowDocument FontFamily="Segoe" FontSize="12" >
<Paragraph>This is some text inside a flowdocument</Paragraph>
<BlockUIContainer>
<Button Content="Click Me?" IsEnabled="True">
</Button>
</BlockUIContainer>
</FlowDocument>
</RichTextBox>
</Window>
虽然我们已经将Button的IsEnable属性设置为True,但实际运行时其仍然是被禁用的.
解决方案如下:
重写FlowDocument的IsEnabledCore属性,将其返回值设置为True
class MyFlowDocument : FlowDocument
{
protected override bool IsEnabledCore
{
get
{
return true;
}
}
}
{
protected override bool IsEnabledCore
{
get
{
return true;
}
}
}
然后使用重写了的MyFlowDocument替换FlowDocument就可以了:)