为 RichTextBox 添加行号功能

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简介：
本文介绍如何在RichTextBox控件中实现显示行号的功能，适用于需要编辑多行文本且希望每行都有编号的用户界面设计场景。 RichTextBox增加行号功能可以彻底解决行号Y坐标不精确的问题。

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为 RichTextBox 添加行号功能

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本文介绍如何在RichTextBox控件中实现显示行号的功能，适用于需要编辑多行文本且希望每行都有编号的用户界面设计场景。 RichTextBox增加行号功能可以彻底解决行号Y坐标不精确的问题。

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简介：这款RichTextBox程序具备自动为文本添加行号的功能，极大地方便了程序员、作家等用户群体在编辑长篇文档时对代码或文字进行有效管理与定位。一个自动为RichTextBox添加行号的程序，非常好用。

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本项目旨在开发一个能够为

元素动态添加行号的功能插件，增强文本编辑体验。

为了在原始的HTML页面中的textarea框加入行号，并替代一些复杂的文本编辑器的功能，可以按照以下步骤进行：

1. 创建一个包含textarea元素的基本HTML结构。
2. 使用JavaScript来读取textarea的内容并计算每一行的位置。
3. 动态生成显示每行数字的标签（例如使用`<span>`或`<div>`），并将这些标签放在每个对应的文本内容之前。

这种方法可以简化用户界面，让代码更易于阅读和维护。通过这种方式实现的功能比一些复杂的编辑器更加轻量级且更适合简单的文本输入需求。
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偶然发现一个资源并进行了测试，现在分享给大家使用。其中一部分引用了VB的代码，将其改写成C#即可。源代码可以在CodeProject网站上找到，地址是https://www.codeproject.com/Articles/38858/Line-Numbers-for-RichText-Control-in-C。
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                                    本项目专注于在Android应用开发中，实现为SurfaceView组件添加视频缩放功能的技术细节和解决方案。通过调整视频显示比例，使画面完美适应不同尺寸屏幕，改善用户体验。

在SurfaceViewDemo的基础上增加放大和缩小视频的功能。
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在SurfaceViewDemo的基础上增加放大和缩小视频的功能。
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