How to remove empty lines from a formatted string?

Question

How to remove empty lines in a string in C#? I am generating some text files in C# (winforms) and for some reason there are some empty lines. How can I remove them after the

Answer 1

I found simple answer to this problem

YourradTextBox.Lines = YourradTextBox.Lines.Where(p => p.Length > 0).ToArray();

Adapted from Marco Minerva [MCPD] at: https://social.msdn.microsoft.com/Forums/windows/en-US/b1bb4107-4ad5-4cd3-bd20-9c2b3f9b31a6/delete-lines-from-multiline-textbox-if-its-contain-certain-string-c?forum=winforms&prof=required

Answer 2

@Tim Pietzcker - Not working for me. I have to change a little bit but thx!
Ehhh C# Regex.. I had to change it again but this working good:

private string RemoveEmptyLines(string lines)
{
  return Regex.Replace(lines, @"^\s*$\n|\r", string.Empty, RegexOptions.Multiline).TrimEnd();
}

Example: http://regex101.com/r/vE5mP1/2

Answer 3

No method mentioned here helped me all the way, but I found a workaround.

1. Split text to lines - collection of strings (with or without empty strings, also Trim() each string).
2. Add these lines to multiline string.

{}

public static IEnumerable<string> SplitToLines(this string inputText, bool removeEmptyLines = true)
{
    if (inputText == null)
    {
        yield break;
    }

    using (StringReader reader = new StringReader(inputText))
    {
        string line;
        while ((line = reader.ReadLine()) != null)
        {
            if (removeEmptyLines && !string.IsNullOrWhiteSpace(line))
                yield return line.Trim();
            else
                yield return line.Trim();
        }
    }
}

public static string ToMultilineText(this string text)
{
    var lines = text.SplitToLines();

    return string.Join(Environment.NewLine, lines);
}

Answer 4

You could try String.Replace("\n\n", "\n");

Answer 5

private string remove_space(string st)
{
    String final = "";

    char[] b = new char[] { '\r', '\n' };
    String[] lines = st.Split(b, StringSplitOptions.RemoveEmptyEntries);
    foreach (String s in lines)
    {
        if (!String.IsNullOrWhiteSpace(s))
        {
            final += s;
            final += Environment.NewLine;
        }
    }

    return final;
}