正则表达式替换除斜线之外的所有特殊字符？

Question

I'm trying to work out some regex that will eliminate all of the special characters that SharePoint won't take when creating a folder.

These are the characters that are not allowed and I am assuming that the bottom regex below will handle all of these. But I want to replace an \\ or / with a dash as well.

~ " # % & * : < > ? / \ { | }

So this is what I have so far, but I'm hoping to combine this all into one function, if possible.

 private void RemoveAndReplaceSpecialCharacters(string input)
    {
        Regex.Replace(input, @"\\", @"-");
        Regex.Replace(input, @"/", @"-");
        Regex.Replace(input, @"[^0-9a-zA-Z\._]", string.Empty);
    }

Answer 1

You don't need Regex.Replace for the first two replacements, so you could combine those into one, or, since they are replaced by the same character, continue using Regex.Replace but only one of those. I also took the liberty of actually making your function do something:

private string RemoveAndReplaceSpecialCharacters(string input) {
    return Regex.Replace(Regex.Replace(input, "[\\\\/]", "-"), @"[^0-9a-zA-Z\._]", string.Empty);
}

You can do it without regular expressions, though: (untested)

private string RemoveAndReplaceSpecialCharacters(string input) {
    const string ALLOWED_CHARACTERS = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ._-";
    return new string(input.Replace('/', '-').Replace('\\', '-').RemoveAll((c) => !ALLOWED_CHARACTERS.Contains(c)).ToArray());
}

Answer 2

 private void RemoveAndReplaceSpecialCharacters(string input)
    {
        Regex.Replace(input, @"[\\\/]+", "-");
            Regex.Replace(input, @"[^0-9a-zA-Z\._]+", string.Empty);
    }

Answer 3

this?

var foo = @"aa\b\hehe";
var baa = Regex.Replace(foo, @"[^\\/]+", "-");