How do I allow whitespace with Regex.Replace

Question

I have created web service method in asp.net c#, and I am using Regex.Replace method beacause of some invalid characters are returning in result, Now how do I allow white space in that method,because in Regex.Replace method, white space is eliminated. see my code:

public string list(long empid, string name, string pwd, long id)
{
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(link);
    request.Connection = Regex.Replace((empid, name, pwd, id), "[^\"a-zA-Z0-9_?<>+=./:-]", "");
    string connection = request.Connection;
    return connection;
}

if I use space like in regex.Replace like this:

request.Connection = Regex.Replace((empid, name, pwd, id), "[^\"a-zA-Z0-9_?<>+=./:- ]", "");

I am getting error:

System.ArgumentException: parsing "[^"a-zA-Z0-9_?<>+=./:- ]" - [x-y] range in reverse order.

Answer 1

You can simply add that character to your class.

[^\"a-zA-Z0-9_?<>+=./: -]

---

If I use space like this: [^\\"a-zA-Z0-9_?<>+=./:- ] I am getting an error....

Within a character class [ ] you can place a hyphen as the first or last character in the range. If you place the hyphen anywhere else you need to escape it.