CODEWITHSUNDEEP
c#regexstring
Doniyor Niazov
Doniyor Niazov

Reputation: 1441

How to replace some part of the text using regex c#

for example:

string str = $@"<html> < head > </ head > < body > <start> < h1 > Header 1 </ h1 > < p > A worker can be of 3 different types.</ p > <end> < p ></ p > </ body > </ html > "
string replacement = "hello world";
string newString = $@"<html> < head > </ head > < body > <start> < h1 > Header 1 </ h1 > < p > hello world</ p > <end> < p ></ p > </ body > </ html > "

So I have a <start> and <end> sign to know which part of the text should be replaced. How I can get the newString by regex.

Upvotes: 1

Views: 6550

Answers (1)

Gilad Green
Gilad Green

Reputation: 37299

Using Regex.Replace you set the pattern from the first <r> to the second, including all that is in between. Then you specify what to replace with.

var result = Regex.Replace(str, "<start>.*?<end>", $"<start> {replacement} <end>");

If prior to C# 6.0 string interpolation then:

var result = Regex.Replace(str, "<start>.*?<end>", string.Format("<start> {0} <end>",replacement));

With latest string from comments:

string str = $@"<html> < head > </ head > < body > <start> < h1 > Header 1 </ h1 > < p > A worker can be of 3 different types.</ p > <end> < p ></ p > </ body > </ html > ";
string replacement = "hello world";

var result = Regex.Replace(str, "<start>.*?<end>", $"<start> {replacement} <end>");

Upvotes: 4

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