CODEWITHSUNDEEP
c#regex
Sayubu
Sayubu

Reputation: 33

replace variable name in formula with Regex.Replace

In c#, I want use a regular expression to replace each variable @A with a number withouth replacing other similar variables like @AB

string input = "3*@A+3*@AB/@A";
string value = "5";
string pattern = "@A"; //<- this doesn't work
string result = Regex.Replace(input, pattern, value);
// espected result = "3*5+3*@AB/5"

any good idea?

Upvotes: 3

Views: 652

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 627128

Use a word boundary \b:

string pattern = @"@A\b";

See regex demo (Context tab)

Note the @ before the string literal: I am using a verbatim string literal to declare the regex pattern so that I do not have to escape the \. Otherwise, it would look like string pattern = "@A\\b";.

Upvotes: 1

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