如何在富文本框中更改部分文本的突出显示颜色? [英] How to change highlight colour of a portion of a text in rich text box?

问题描述

我是WPF的RichTextBox的新手.我想知道如何在具有特定颜色的行上突出显示文本.

I am new to WPF's RichTextBox. I would like to know how to highlight text on a line with a specific colour.

假设我有一个带有黄色背景的富文本框，并为其指定了流程文档.

Let's say I have a rich text box with a yellow background and assign to it a flow document.

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

下一步要怎么做才能将第三行的突出显示颜色更改为红色?我不是在谈论选择突出显示颜色，而是普通的高亮文字(例如在写字板中)

What would I have to do next to change the third line's highlight colour to red? I am not talking about selection highlight colour, but normal text highligting (like in WordPad)

如果有解决方案，我希望使用C#代码，但我希望远离XAML编辑.

If there is a solution, I would like it in C# code, I want to stay away from XAML editing.

推荐答案

    Run run = new Run("Red is the third line.\n");
    // run.Foreground = Brushes.Red;
    run.Background = Brushes.Red;
    para.Inlines.Add(run);

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