CODEWITHSUNDEEP
c#linqarrays
DidIReallyWriteThat
DidIReallyWriteThat

Reputation: 1033

Use linq to search a string[]

Im new to linq and trying to learn some basic? functionality. I have a string that im splitting into a string array and I want to query the array for values. My code.

string input = "a1,b2,c3,d4";

var collection = input.Split(',');

string output = collection.OfType<string>().Where(r => (string)r.Contains("a").FirstOrDefaule();

I think im on the right track but Its not quite there. I want the output to be a1.

The error is cannot convert bool to string, which makes sense, but how would you do this without using the contains method?

Upvotes: 0

Views: 1234

Answers (3)

Lamourou abdallah
Lamourou abdallah

Reputation: 354

Try this one

string output= collection.Where(r => r.Contains("a")).FirstOrDefault();

Upvotes: 0

AntonE
AntonE

Reputation: 682

Why you use cast to string in Where clause? You don't need it. Try this 

string output= urls.OfType<string>().Where(r => r.Contains("a")).FirstOrDefault();

Upvotes: 0

Andrew
Andrew

Reputation: 5093

This code should work:

string output = collection.First(r => r.Contains("a"));

Contains is probably the most efficient way.

Where gives you a new list of all elements which have an "a"; First (or FirstOrDefault) will return a single value.

Upvotes: 5

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