Finding and replacing using Regex

Question

I am trying to find and replace a string when someone inputs it as a search query if they should misspell the code, for example Z0000ECEL is written as Z000ECEL it would replace it to be Z00+ECEL, this is so it finds the closest code to this and find it still even if they misspell it, I am currently using:

        if (Regex.IsMatch(searchWords[0], "^[a-z]+z00+", RegexOptions.IgnoreCase))
        {
            Regex.Replace(searchWords[0], "[0]+", "*0", RegexOptions.IgnoreCase);
        }

I do not want to place a wildcard at the start of the string as this will bring back to many results.

No as the starting letter varies based on the product so I just use ^[a-z]+ — Hello World
– Hello World, Commented Jun 11, 2012 at 9:05
in your sample there is Z000ECEL, so at first Z000 and then the rest letters — ie.
– ie., Commented Jun 11, 2012 at 9:06
so to simplify - you want to replace the last two zeroes in Z000 to 0*, right? — ie.
– ie., Commented Jun 11, 2012 at 9:15

stema · Accepted Answer · 2012-06-11 09:33:58Z

1

Is this doing what you want?

Regex.Replace(searchWords[0], "0{3,}", "00*");

this will replace 3 or more zeros with "00*"

You can also combine this with your first check

Regex.Replace(searchWords[0], "(?<=^[a-z]+z)0{3,}", "00*", RegexOptions.IgnoreCase);

This is involving a lookbehind assertion, so the 0{3,} will be only replaced, if there is a ^[a-z]+z before.

answered Jun 11, 2012 at 9:33

stema

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1 Comment

Hello World Over a year ago

This is great, thank you (actually turned out I was doing it in the wrong place that would be a lot more complicated)

Qtax · Accepted Answer · 2012-06-11 09:33:36Z

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