Question

I want to find First Word matching from Given Text and replace with another word, using Regex.

Consider following string as an Example Text

Which type is your item? i suppose that the item isn’t a string, if so
you can override ToString() method in
the item class and use the jayant’s
code.

I want to search first “item” word in it and replace that with text “hello”. Remember i just want to replace first “item” word only and not all.

So output of above text would be something like following.

Which type is your hello? i suppose that the item isn’t a string, if so
you can override ToString() method in
the item class and use the jayant’s
code.

I am using C# Programming to do this and I would prefer to use Regex if possible.

Can anyone please help me with this.

Answer 1

You can use the Regex.Replace() method with the 3rd parameter (maximum replacements):

Regex rgx = new Regex("item");
string result = rgx.Replace(str, "hello", 1);

See it on ideone

(Though in this case you don’t really need Regex because you are searching for a constant.)