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c#regexstringlinq
Simon Kiely
Simon Kiely

Reputation: 6050

Running a regular expression on a String using Linq

I have a String, I wish to use Linq to run a regular expression to cut down my string to a smaller sub-string which matches my reg ex.

My code at the moment gives the error

'char' does not contain a definition for 'Name' and no extension method 'Name' accepting a first argument of type 'char' could be found

My code : 

string variable = result.Name.Select(r => regEx.Match(r.Name).Groups[2].ToString());

Result.Name is a string contained in a custom class.

What have I done incorrectly? What is wrong with my syntax/understanding ?

Upvotes: 5

Views: 10817

Answers (4)

Alfonso Leon
Alfonso Leon

Reputation: 507

This should work...

string result = result.Name.Select(@regEx => Regex.Match(match.Groups[2].ToString(), @regEx));

Upvotes: 0

Rawling
Rawling

Reputation: 50114

You're calling Select on a single string. Select is treating your string as a series of characters, and so the r in your lambda expression is a char.

If you only have a single string you want to pass into your regular expression, and you only want a single match out, then you don't need LINQ at all. Just call

string variable = regEx.Match(result.Name).Groups[2].ToString();

(I'm assuming result.Name is your single string, based on your example code.)

Upvotes: 2

dtb
dtb

Reputation: 217313

Are you looking for something like this?

string[] result = Regex.Matches(input, pattern)
                       .Cast<Match>()
                       .Select(match => match.Groups[2].Value)
                       .ToArray();

Upvotes: 20

Samy Arous
Samy Arous

Reputation: 6814

Shouldn't it be 

string variable = result.Select(r => regEx.Match(r.Name).Groups[2].ToString());

if you run Select on the Name field, you are running it on a string which is an array of char

Upvotes: 0

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