Question

I have a question about read a text file, because i dont know if i’m thinking right. I want to read from specific string to specific character.

My text would look like this:

... 
...
CM_ "Hello, how are you?

Rules: Don't smoke!
      - love others

End";
...
CM_ "Why you?";
...// Many CM_
...

After Splited should look like that:

1. CM_
2. "Hello, how are you?

    Rules: Don't smoke!
      - love others

    End"
3. CM_
4. "Why you?"
... // many CM_

I want to read from "CM_" till ";"

My Code i tried so far:

StreamReader fin = new StreamReader("text.txt");
string tmp = "";
tmp = fin.ReadToEnd();

if (tmp.StartsWith("CM_ ") && tmp.EndWith(";"))
{
var result = tmp.Split(new[] { '"' }).SelectMany((s, i) =>
                    {
                        if (i % 2 == 1) return new[] { s };
                        return s.Split(new[] { ' ', ';' }, StringSplitOptions.RemoveEmptyEntries);
                    }).ToList();
}
foreach (string x in result)
{
   Console.WriteLine(x);
}

Answer 1

    static void PRegex()
    {
        using (StreamReader fin = new StreamReader("text.txt"))
        {
            string tmp = fin.ReadToEnd();

            var matches = Regex.Matches(tmp, "(CM_) ([^;]*);", RegexOptions.Singleline);
            for (int i = 0; i < matches.Count; i++)
                if (matches[i].Groups.Count == 3)
                    Console.WriteLine((2 * i + 1).ToString() + ". " + matches[i].Groups[1].Value + "\r\n" + (2 * (i + 1)).ToString() + ". " + matches[i].Groups[2].Value);
        }

        Console.ReadLine();
    }

    static void PLineByLine()
    {
        using (StreamReader fin = new StreamReader("text.txt"))
        {
            int index = 0;
            string line = null;
            string currentCMBlock = null;
            bool endOfBlock = true;
            while ((line = fin.ReadLine()) != null)
            {
                bool endOfLine = false;
                while (!endOfLine)
                {
                    if (endOfBlock)
                    {
                        int startIndex = line.IndexOf("CM_ ");
                        if (startIndex == -1)
                        {
                            endOfLine = true;
                            continue;
                        }
                        line = line.Substring(startIndex + 4, line.Length - startIndex - 4);
                        endOfBlock = false;
                    }

                    if (!endOfBlock)
                    {
                        int startIndex = line.IndexOf(";");
                        if (startIndex == -1)
                        {
                            currentCMBlock += line + "\r\n";
                            endOfLine = true;
                            continue;
                        }
                        currentCMBlock += line.Substring(0, startIndex);
                        if (!string.IsNullOrEmpty(currentCMBlock))
                            Console.WriteLine((++index) + ". CM_\r\n" + (++index) + ". " + currentCMBlock);
                        currentCMBlock = null;
                        line = line.Substring(startIndex + 1, line.Length - startIndex - 1);
                        endOfBlock = true;
                    }
                }
            }
        }

        Console.ReadLine();
    }