在流程文档中更改内联 [英] Changing inline in flowdocument

问题描述

我有一个这样的流程文件:

I have a flowdocument like this:

var mcFlowDoc = new FlowDocument();
var para = new Paragraph();
para.Inlines.Add(new Run("This is the first line."));
para.Inlines.Add(new Run("This is the second line."));
para.Inlines.Add(new Run("This is the third line."));
mcFlowDoc.Blocks.Add(para);
richTextBox.Document = mcFlowDoc;

我需要通过单击该文本的任何部分来更改其中一行的背景.

I need to change the background of one of the lines by clicking on any part of that text.

首先，我试图更改给定内联的背景(无论鼠标点击)，但我无法做到.

First of all I am trying to change the background of a given inline (regardless of mouse click), but I am unable to do it.

任何帮助将不胜感激.

我可以更改运行的背景颜色，但随后我必须再次添加所有运行并重绘.我需要它更快地工作，所以我只是想改变一个运行而不重新添加所有.

I could change the background color of a run, but then I had to add all runs again and redraw. I need it to work faster, so I'm just trying to change a run without adding all again.

推荐答案

您可以为 Run 添加一个 Style 以订阅例如MouseLeftButtonDown

You could add a Style for Run to subscribe e.g. MouseLeftButtonDown

<RichTextBox.Resources>
    <Style TargetType="Run">
        <EventSetter Event="MouseLeftButtonDown" Handler="Run_Click" />
    </Style>
</RichTextBox.Resources>

并像这样处理事件

void Run_Click(object sender, MouseButtonEventArgs e)
{
    Run run = sender as Run;
    run.Background = Brushes.Red;
}

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