How to eliminate ALL line breaks in string?

Question

I have a need to get rid of all line breaks that appear in my strings (coming from db). I do it using code below:

value.Replace(\"\\r\\n\", \"\").Replace(\"\\n\"         


        

Answer 1

Have you tried string.Replace(Environment.NewLine, "") ? That usually gets a lot of them for me.

Answer 2

8232 (0x2028) and 8233 (0x2029) are the only other ones you might want to eliminate. See the documentation for char.IsSeparator.

Answer 3

Here are some quick solutions with .NET regex:

• To remove any whitespace from a string: s = Regex.Replace(s, @"\s+", ""); (\s matches any Unicode whitespace chars)
• To remove all whitespace BUT CR and LF: s = Regex.Replace(s, @"[\s-[\r\n]]+", ""); ([\s-[\r\n]] is a character class containing a subtraction construct, it matches any whitespace but CR and LF)
• To remove any vertical whitespace, subtract \p{Zs} (any horizontal whitespace but tab) and \t (tab) from \s: s = Regex.Replace(s, @"[\s-[\p{Zs}\t]]+", "");.

Wrapping the last one into an extension method:

public static string RemoveLineEndings(this string value)
{
    return Regex.Replace(value, @"[\s-[\p{Zs}\t]]+", "");
}

See the regex demo.

Answer 4

Check out this link: http://msdn.microsoft.com/en-us/library/844skk0h.aspx

You wil lhave to play around and build a REGEX expression that works for you. But here's the skeleton...

static void Main(string[] args)
{

        StringBuilder txt = new StringBuilder();
        txt.Append("Hello \n\n\r\t\t");
        txt.Append( Convert.ToChar(8232));

        System.Console.WriteLine("Original: <" + txt.ToString() + ">");

        System.Console.WriteLine("Cleaned: <" + CleanInput(txt.ToString()) + ">");

        System.Console.Read();

    }

    static string CleanInput(string strIn)
    {
        // Replace invalid characters with empty strings.
        return Regex.Replace(strIn, @"[^\w\.@-]", ""); 
    }

Answer 5

Below is the extension method solving my problem. LineSeparator and ParagraphEnding can be of course defined somewhere else, as static values etc.

public static string RemoveLineEndings(this string value)
{
    if(String.IsNullOrEmpty(value))
    {
        return value;
    }
    string lineSeparator = ((char) 0x2028).ToString();
    string paragraphSeparator = ((char)0x2029).ToString();

    return value.Replace("\r\n", string.Empty)
                .Replace("\n", string.Empty)
                .Replace("\r", string.Empty)
                .Replace(lineSeparator, string.Empty)
                .Replace(paragraphSeparator, string.Empty);
}

Answer 6

personally i'd go with

    public static String RemoveLineEndings(this String text)
    {
        StringBuilder newText = new StringBuilder();
        for (int i = 0; i < text.Length; i++)
        {
            if (!char.IsControl(text, i))
                newText.Append(text[i]);
        }
        return newText.ToString();
    }