Question

I would like to match these lines:

ParameterINeed: 758
ParameterCount: 8695
ParameterText: 56

And I would receive a parameter name and parameter value. Could you please tell me how to write Regex.Matches patter for this and how to process this data into Dictionary?

I use this code:

string Text = "ParameterINeed: 758\r\nParameterCount: 8695\r\nParameterText: 56";
string Pattern = "^(\\w+):\\s+(\\d+)$";
MatchCollection ma = Regex.Matches(Text, Pattern, RegexOptions.Singleline);

And get ma.Count = 0

Answer 1

The RegexOptions.SingleLine only affects how the period token works, not how the ^ and $ tokens work. You need to use RegexOptions.MultiLine for that.

The multiline mode doesn’t understand the \r\n line breaks, it only considers the \n character as line break. You have to consume the \r character to get to the line break.

string text = "ParameterINeed: 758\r\nParameterCount: 8695\r\nParameterText: 56";
string pattern = @"^(\w+):\s+(\d+)\r?$";
MatchCollection ma = Regex.Matches(text, pattern, RegexOptions.Multiline);

Now ma.Count is 3.

This is how you put the matches in a dictionary:

Dictionary<string, int> values = new Dictionary<string, int>();
foreach (Match match in ma) {
    values.Add(match.Groups[1].Value, int.Parse(match.Groups[2].Value));
}