How to check exact string match in c#?

the \b is a word boundary check, and used like above it will be able to match whole words only. I would suggest using Regex for this. By appending the \b to either side of the text you’re trying to match, you can find the “exact” match within the text.

How do I match a word in regex?

To run a “whole words only” search using a regular expression, simply place the word between two word boundaries, as we did with ‹ \bcat\b ›. The first ‹ \b › requires the ‹ c › to occur at the very start of the string, or after a nonword character.

How do you find and replace a word in a string in C#?

string res = str. Replace(“Demo “, “New “); The following is the complete code to replace a word in a string.

How do I search for a word in C#?

In C#, IndexOf() method is a string method. This method is used to find the zero based index of the first occurrence of a specified character or string within current instance of the string. The method returns -1 if the character or string is not found.

What does \b do in C#?

C# – Character Escapes

Escape character Description Pattern
\b In a character class, matches a backspace, . [\b]{3,}
\t Matches a tab, . (\w+)\t
\r Matches a carriage return, . (\r is not equivalent to the newline character, \n.) \r\n(\w+)
\v Matches a vertical tab, . [\v]{2,}

How do I replace all in a string?

To replace all occurrences of a substring in a string by a new one, you can use the replace() or replaceAll() method:

  1. replace() : turn the substring into a regular expression and use the g flag.
  2. replaceAll() method is more straight forward.

How does regex work in C#?

In C#, Regular Expression is a pattern which is used to parse and check whether the given input text is matching with the given pattern or not. In C#, Regular Expressions are generally termed as C# Regex. The . Net Framework provides a regular expression engine that allows the pattern matching.

How do you search a string?

  1. Definition and Usage. The search() method matches a string against a regular expression **
  2. Return Value. Type.
  3. The Differense Between. String search() and String indexOf()
  4. The Differense Between. String search() and String match()
  5. Regular Expression Search Methods.
  6. Browser Support.