CODEWITHSUNDEEP
.netregex
Hristo
Hristo

Reputation: 889

Matching filter expression text

I have to build a filter expression dynamically. That's why I would like to match and replace filter. For example I have the following string:

string input = " (Country = \"Brazil\" OR Country = \"Canada\") AND CompanyName.Contains(\"Contoso\") ";

I want to replace, CompanyName.Contains(\"Contoso\") where Company Name may have different name.

Here is my code:

string input = " (Country = \"Brazil\" OR Country = \"Canada\") AND CompanyName.Contains(\"Contoso\") ";
string replacement = "123456";
string pattern = @"(CompanyName.Contains\()";

// \"[^\"]*\"

Regex rgx = new Regex(pattern);
string result = rgx.Replace(input, replacement);

Console.WriteLine(result);

It seems that my filter expression is wrong. What it should be?

Upvotes: 1

Views: 76

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626794

In your expression, the dot is not escaped and it only matches part of the required CompanyName.Contains("Contoso") stopping right after the opening (.

You can use

var pattern = @"\bCompanyName\.Contains\([^()]*\)";

See the regex demo

The \b matches a word boundary, an escaped dot matches a literal dot and \([^()]*\) matches a ( followed with 0+ characters other than ( and ) (due to the negated character class [^()]).

Upvotes: 1

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