如何在Visual Studio 2017中用正则表达式给每行文本加<li>标签？

Got it, let's sort out this regex find-and-replace issue for you. The problem with your original setup is that you didn't capture the line content into a group—so $1 was empty, leading to empty <li> tags. Here's the step-by-step fix:

• Open the Find and Replace dialog (press Ctrl+H).
• Make sure the Use Regular Expressions toggle is enabled (it's the button with the .* icon in the dialog toolbar).
• Set your Find what field to: ^(.*)$
  • The parentheses () wrap the entire line content into the first capture group, which we'll reference later.
  • ^ matches the start of a line, .* matches any character (except newlines) zero or more times, $ matches the end of a line.
• Set your Replace with field to: <li>$1</li>
  • $1 pulls in the content we captured with the parentheses in the find pattern.
• Click Replace All to apply this to every line in your file.

Bonus: Skip Empty Lines #

If you don't want to add <li> tags to blank lines, adjust your find pattern to:
^(.+)$
The + instead of * ensures we only match lines with at least one character.

Just a quick note: Visual Studio 2017 uses its own flavor of regex, so capture groups work with standard parentheses () and you reference them with $1, $2, etc.—which you already had right, you just missed wrapping the line content in a group!

内容的提问来源于stack exchange，提问作者Rod