Home/ Questions/Q 6563735
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-25T13:53:03+00:00

I have a string structured like that: BLOCK LIST1 Lorem ipsum dolor sit amet.

  • 0

I have a string structured like that:

BLOCK
    LIST1 Lorem ipsum dolor sit amet.
    LIST1 Lorem ipsum dolor sit amet.
    LIST1 Lorem ipsum dolor sit amet.
        LIST2 Lorem ipsum dolor sit amet.
        LIST2 Lorem ipsum dolor sit amet.
    LIST1 Lorem ipsum dolor sit amet.
BLOCK
    LIST1 Lorem ipsum dolor sit amet.
        LIST2 Lorem ipsum dolor sit amet.
            LIST3 Lorem ipsum dolor sit amet.
        LIST2 Lorem ipsum dolor sit amet.
    LIST1 Lorem ipsum dolor sit amet.
    LIST1 Lorem ipsum dolor sit amet.
    LIST1 Lorem ipsum dolor sit amet.

…

and I want it to transform into like that:

1. Lorem ipsum dolor sit amet.
    1. Lorem ipsum dolor sit amet.
    2. Lorem ipsum dolor sit amet.
    3. Lorem ipsum dolor sit amet.
        1. Lorem ipsum dolor sit amet.
        2. Lorem ipsum dolor sit amet.
    4. Lorem ipsum dolor sit amet.
2. Lorem ipsum dolor sit amet.
    1. Lorem ipsum dolor sit amet.
        1. Lorem ipsum dolor sit amet.
            1. Lorem ipsum dolor sit amet.
        2. Lorem ipsum dolor sit amet.
    2. Lorem ipsum dolor sit amet.
    3. Lorem ipsum dolor sit amet.
    4. Lorem ipsum dolor sit amet.
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team
    var input = "BLOCK\r\n    LIST1 Lorem ipsum dolor sit amet ...";

var levels = new List<string> { "BLOCK", "LIST1", "LIST2", "LIST3" };
var counter = levels.ToDictionary(level => level, level => 0);

// Replace each key word with incremented counter,
// while resetting deeper levels to 0.
var result = Regex.Replace(input, string.Join("|", levels), m =>
{
    for (int i = levels.IndexOf(m.Value) + 1; i < levels.Count; i++)
    {
        counter[levels[i]] = 0;
    }
    return (++counter[m.Value]).ToString() + ".";
});

    Result:

    1.
    1. Lorem ipsum dolor sit amet.
    2. Lorem ipsum dolor sit amet.
    3. Lorem ipsum dolor sit amet.
        1. Lorem ipsum dolor sit amet.
        2. Lorem ipsum dolor sit amet.
    4. Lorem ipsum dolor sit amet.
2.
    1. Lorem ipsum dolor sit amet.
        1. Lorem ipsum dolor sit amet.
            1. Lorem ipsum dolor sit amet.
        2. Lorem ipsum dolor sit amet.
    2. Lorem ipsum dolor sit amet.
    3. Lorem ipsum dolor sit amet.
    4. Lorem ipsum dolor sit amet.
    • 0