正则表达式帮助从字符串中提取值

Question

I can't figure out how to extract specific numbers with a specific match from a string.

Example:

string myString = "blah blah **[10]** blah **[20]** and some more blah **[30]**";
Regex myIDsReg = new Regex(@"\*\*\[(\d+)\]\*\*");

Apparently the regex is sound.

Match myMatch = myIDsReg.Match(myString);

Yields "**[10]**" but nothing else.

I can't figure out how to get an array with the following values: 10, 20, 30

Answer 1

Use Matches instead of Match .

foreach (Match match in myIDsReg.Matches(myString))
{
    // etc...
}

See it working online: ideone

Answer 2

I would do this

string myString = "blah blah **[10]** blah **[20]** and some more blah **[30]**";
Regex myIDsReg = new Regex(@"\*\*\[(\d+)\]\*\*");
string[] regexResult = (from Match match in myIDsReg.Matches(myString) select match.Groups[1].Value).ToArray();

You can select which output you want as well

List<string> regexResult = (from Match match in myIDsReg.Matches(myString) select match.Groups[1].Value).ToList();

or

IEnumerable<string> regexResult = (from Match match in myIDsReg.Matches(myString) select match.Groups[1].Value);

I'd prefer one of the two latter

Answer 3

Trikks came up with the best answer. I just had to modify it a little to work best for me.

string myString = "blah blah **[10]** blah **[20]** and some more blah **[30]**";
Regex myIDsReg = new Regex(@"\*\*\[(\d+)\]\*\*");
string[] regexResult = (from Match match in myIDsReg.Matches(myString) select match.Groups[1].Value).ToArray();

I basically replaced "select match.Value" with "select match.Groups[1].Value".

Thanks for your help!