Unable to remove invisible chars using Regex

Question

I want to remove any invisible chars from a string, only keep spaces & any chars from 0x20-0x7F, I use this: Regex.Replace(QueryString, @"[^\s\x20-\x7F]", ""); However it does not work

QueryString has a char 0xA0, after that, the char still exists in QueryString.

I am not sure why this failed to work?

score 3 · Accepted Answer · answered May 03 '11 at 23:01

3

0xA0 is the non-breaking space character - and as such it's matched with \s. Rather than using \s, expand this out into the list of whitespace characters you want to include.

answered May 03 '11 at 23:01

Will A

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thanks you so much, Will A. that works. I do not know how to mark as answer? – susu May 03 '11 at 23:13
My pleasure - happy regex'ing! – Will A May 03 '11 at 23:14

score 0 · Answer 2 · answered May 03 '11 at 23:04

0

I think you would rather use StringBuilder to process such strings.

StringBuilder sb = new StringBuilder(str.Length);
foreach(char ch in str)
{
    if (0x20 <= ch && ch <= 0x7F)
    {
        sb.Append(ch)
    }
}

string result = sb.ToString();

answered May 03 '11 at 23:04

oxilumin

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thanks, oxilumin. I will mark yours as helpful once I restore my login info. – susu May 03 '11 at 23:16

Unable to remove invisible chars using Regex

2 Answers2