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I have a big string, and want to find the first occurrence of X, X is "numberXnumber"... 3X3, or 4X9...
How could i do this in C#?
250
* in Regex means: Matches the previous element zero or more times. so that, you need to use \* or [*] instead.
The Match-zero-or-more Operator ( * ) This operator repeats the smallest possible preceding regular expression as many times as necessary (including zero) to match the pattern. `*' represents this operator. For example, `o*' matches any string made up of zero or more `o' s.
Special Regex Characters: These characters have special meaning in regex (to be discussed below): . , + , * , ? , ^ , $ , ( , ) , [ , ] , { , } , | , \ . Escape Sequences (\char): To match a character having special meaning in regex, you need to use a escape sequence prefix with a backslash ( \ ). E.g., \. matches "."
The backslash character (\) in a regular expression indicates that the character that follows it either is a special character (as shown in the following table), or should be interpreted literally. For more information, see Character Escapes. Escaped character. Description. Pattern.
var s = "long string.....24X10 .....1X3";
var match = Regex.Match(s, @"\d+X\d+");
if (match.Success) {
Console.WriteLine(match.Index); // 16
Console.WriteLine(match.Value); // 24X10;
}
Also take a look at NextMatch which is a handy function
match = match.NextMatch();
match.Value; // 1X3;
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