WPF RichTextBox-选定的块? [英] WPF RichTextBox - Selected Block?

问题描述

我正在尝试使用WPF RichTextBox，并注意到可以通过遍历RichTextBox.Document.Blocks遍历组成其文档的块.

I am experimenting with the WPF RichTextBox and notice that I can itterate through the blocks that make up its document by looping through RichTextBox.Document.Blocks.

获得包围插入符的块的最佳方法是什么?

What is the best way to get the Block that surrounds the caret?

我可以获得每个块的CaretPosition以及ElementStart和ElementEnd属性，但是看不到如何比较它们，因为除非我遗漏了一些明显的东西，否则不会公开实际的字符偏移量.

I can get the CaretPosition and the ElementStart and ElementEnd properties of each block but can't see how to compare them because the actual character offsets are not exposed unless I am missing something obvious.

推荐答案

var curCaret = richTextBox1.CaretPosition;
var curBlock = richTextBox1.Document.Blocks.Where(x => x.ContentStart.CompareTo(curCaret) == -1 && x.ContentEnd.CompareTo(curCaret) == 1).FirstOrDefault();

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