Can I use regular expressions with String.Replace in C#?

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For example I have code below string txt="I have strings like West, and West; and west, and Western."

I would like to replace the word west or West with some other word. But I would like not to replace West in Western.

  1. Can I use regular expression in string.replace? I used inputText.Replace("(\\sWest.\\s)",temp); It dos not work.

To replace the whole word (rather than part of the word):

string s = "Go west Life is peaceful there";
s = Regex.Replace(s, @"\bwest\b", "something");

Regex.Replace Method (System.Text.RegularExpressions , Wipfli shows you how to replace multiple patterns, characters, strings and to replace each one separately, so I thought I'd just use a Regular Expression. Now the pattern can include multiple items, for example Regex. Regular expression replace in C#. I'm fairly new to using regular expressions, and, based on a few tutorials I've read, I'm unable to get this step in my Regex.Replace formatted properly. Here's the scenario I'm working on When I pull my data from the listbox, I want to format it into a CSV like format, and then save the file.

Answer to the question is NO - you cannot use regexp in string.Replace.

If you want to use a regular expression, you must use the Regex class, as everyone stated in their answers.

C# Regex.Replace Examples: MatchEvaluator, abc* matches a string that has ab followed by zero or more c -> Try it!abc+ As you've seen, the application fields of regex can be multiple and I'm to translate a Java or C# class in the respective JSON object — replace “  Substitutions are language elements that are recognized only within replacement patterns. They use a regular expression pattern to define all or part of the text that is to replace matched text in the input string. The replacement pattern can consist of one or more substitutions along with literal characters.

Have you looked at Regex.Replace? Also, be sure to catch the return value; Replace (via any string mechanism) returns a new string - it doesn't do an in-place replace.

Search/Replace with the Regex Class, C# supports regular expressions through the classes in the System. To test whether a regular expressions matches a string, you can use the static method task is to find and replace a part of a string using regular expressions, for example,  C# program that uses Regex.Replace method using System; using System.Text.RegularExpressions; class Program { static void Main () { // This is the input string we are replacing parts from. string input = "Dot Net Not Perls"; // Use Regex.Replace to replace the pattern in the input.

Try using the System.Text.RegularExpressions.Regex class. It has a static Replace method. I'm not good with regular expressions, but something like

string outputText = Regex.Replace(inputText, "(\\sWest.\\s)", temp);

should work, if your regular expression is correct.

C# regex replace multiple matches: A how-to guide – Wipfli, C# - Regular Expressions - A regular expression is a pattern that could be matched The Regex class is used for representing a regular expression. all strings that match a regular expression pattern with a specified replacement string. 6. I was hoping to use a string.replace() method to look through all these file names and do the replacement. So far, the only code I've gotten to is the recursion. I was thinking of the recursion scanning the drive, fetching the names of these files and putting them in a List<string> .

USe this code if you want it to be case insensitive

string pattern = @"\bwest\b";
string modifiedString = Regex.Replace(input, pattern, strReplacement, RegexOptions.IgnoreCase);

Regex tutorial, The above regular expression can be used for checking if a given set of characters is an email Example : [abc] will match characters a,b and c in any string. C# - Regular Expressions. A regular expression is a pattern that could be matched against an input text. The .Net framework provides a regular expression engine that allows such matching. A pattern consists of one or more character literals, operators, or constructs.

Learn Regular Expressions - C, The regular expressions library provides a class that represents regular expressions, which are a kind of mini-language used to perform pattern matching within strings. Almost all operations with regexes can be characterized by operating This is a string that determines how to replace the matches, see  The Regex.Replace(String, String, MatchEvaluator, RegexOptions) method is useful for replacing a regular expression match in if any of the following conditions is true: The replacement string cannot readily be specified by a regular expression replacement pattern. The replacement string results from some processing done on the matched string.

C# - Regular Expressions, We looked at some methods of trimming the starts and ends of strings using the System.Text.RegularExpressions namespace in the C# language. For my projects where performance is critical, I don't use Regex. Note: Some programs focus on speed. But for many tasks, such as processing data in the background, Regex is ideal. Regex

How to write Regular Expressions?, Regular Expression Patterns. Patterns are the key to successful use of regular expressions. Depending on the complexity of the problem that regex is used to solve, these can vary from a straightforward human readable string pattern, to a complex combination of string characters, metacharacters, grouping and capturing characters.

Comments
  • Looks alright but this will ignore west, and west. And is it case insensitive?
  • I think it does the same as I am already doing Using 's=s.Replace(" West ","something");'
  • It works like string s = Regex.Replace(s, @"(\bwest\b)", "something");. And it works for west. and west, and west; as well. Dont really understand why :)
  • The "\b" matches a "word boundary". This regex is case sensitive, but you can add a RegexOptions.IgnoreCase (4th param) to make it case insensitive.
  • +1 only answer that directly answers the question if you can use String.Replace also for regex expressions
  • This looks like a question. Ask as a question. Also, you posted this non-answer to a question asked, and answered, 6 years ago.