ignore case sensitive in regex.replace?

Question

I have this code to search in a string and replace some text with other text:

Regex regexText = new Regex(textToReplace);
retval = regexText.Replace(retval, Newtext);

textToReplace may be "welcome" or "client" or anything.

I want to ignore case for textToReplace so that "welcome" and "Welcome" both match.

How can I do this?

petro.sidlovskyy · Accepted Answer · 2011-01-19 16:15:12Z

20

You may try:

Regex regexText = new Regex(textToReplace, RegexOptions.IgnoreCase);

answered Jan 19, 2011 at 16:15

petro.sidlovskyy

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Comments

Sebastian Paaske Tørholm · Accepted Answer · 2011-01-19 16:19:38Z

15

You simply pass the option RegexOptions.IgnoreCase like so:

Regex regexText = new Regex(textToReplace, RegexOptions.IgnoreCase);
retval = regexText.Replace(retval, Newtext);

Or, if you prefer, you can pass the option directly to the Replace method:

retval = Regex.Replace(retval, textToReplace, Newtext, RegexOptions.IgnoreCase);

A list of the available options you can set for regexes is available at the RegexOptions documentation page.

answered Jan 19, 2011 at 16:13

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Sorry, you was first :) so +1 to your post.

Hans Keﬆing · Accepted Answer · 2011-01-19 16:13:42Z

1

There's a Regex.Replace overload with RegexOptions. Those options include an IgnoreCase value.

answered Jan 19, 2011 at 16:13

Hans Keﬆing

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