CODEWITHSUNDEEP
c#regex
James Jeffery
James Jeffery

Reputation: 557

Extracting Numbers from String RegEx

I am really struggling with Regular Expressions and can't seem to extract the number from this string

"id":143331539043251,

I've tried with this ... but I'm getting compilation errors

var regex = new Regex(@""id:"\d+,");

Note that the full string contains other numbers I don't want. I want numbers between id: and the ending ,

Upvotes: 2

Views: 12897

Answers (3)

Aravinda
Aravinda

Reputation: 21

If you are open to using LINQ try the following (c#):

string stringVariable = "123cccccbb---556876---==";

var f = (from a in stringVariable.ToCharArray() where Char.IsDigit(a) == true select a);

var number = String.Join("", f);

Upvotes: 2

kyrylomyr
kyrylomyr

Reputation: 12632

Try this code:

var match = Regex.Match(input, @"\""id\"":(?<num>\d+)");
var yourNumber = match.Groups["num"].Value;

Then use extracted number yourNumber as a string or parse it to number type.

Upvotes: 4

Oded
Oded

Reputation: 498934

If all you need is the digits, just match on that:

[0-9]+

Note that I am not using \d as that would match on any digit (such as Arabic numerals) in the .NET regex engine.

Update, following comments on the question and on this answer - the following regex will match the pattern and place the matched numbers in a capturing group:

@"""id"":([0-9]+),"

Used as:

Regex.Match(@"""id"":143331539043251,", @"""id"":([0-9]+),").Groups[1].Value

Which returns 143331539043251.

Upvotes: 3

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