How to remove escape sequences from stream

Question

is there an quick way to find(and remove) all escape sequences from a Stream/String??

Answer 1

You can use System.Char.IsControl() to detect control characters.

To filter control characters from a string:

public string RemoveControlCharacters(string input)
{
    return
        input.Where(character => !char.IsControl(character))
        .Aggregate(new StringBuilder(), (builder, character) => builder.Append(character))
        .ToString();
}

To filter control characters from a stream you can do something similar, however you will first need a way to convert a Stream to an IEnumerable.

public IEnumerable _ReadCharacters(Stream input)
{
    using(var reader = new StreamReader(input))
    {
        while(!reader.EndOfStream)
        {
            foreach(var character in reader.ReadLine())
            {
                yield return character;
            }
        }
    }
}

Then you can use this method to filter control characters:

public string RemoveControlCharacters(Stream input)
{
    return
        _ReadCharacters(input)
        .Where( character => !Char.IsControl(character))
        .Aggregate( new StringBuilder(), ( builder, character ) => builder.Append( character ) )
        .ToString();
}