正则表达式从字符串中删除点

Question

I have this

regex Regex.Replace(listing.Company, @"[^A-Za-z0-9_\.~]+", "-");

listing.Company is a string, this works but when a string has dots it does not remove them.

Could you please help me out

Answer 1

In your current regex, you have \\. in your exclusion, which will cause it to be ignored by Regex.Replace . Also, your regex does nothing to convert the input string to lower case. You can do that afterwards, but doing it before your Replace makes your pattern simpler.

Try this method out:

var output = Regex.Replace(listing.Company.ToLower(), "[^a-z0-9_]+", "-");

Answer 2

try

Regex.Replace(listing.Company.ToLower(), @"[^a-z0-9_]+", "-");

you are excluding \\. which is for dot. Also, if you want it in lower letters, you need to convert the string to lower case first.

Answer 3

Perhaps you are looking for something like this:

string res = Regex.Replace(listing.Company, @"[\W+\.~]", "-");

Here regex engine will look for any character other than AZ, az, underscore along with dot and ~ and will replace it with "-".

Demo