C# Array specific value

Question

I have a code in C# that I want to return only a single item from the array, what I currently have is, it returns all the result as following:

  1  This transaction has been approved. 
  2  NRO6CL 
  3  Y 
  4  2223032442 
  5  Sample Transaction 
  6  19.99 
  7  CC

All I need to do is, get 19.99 from the array. not everything in that array as shown above. The code below displays all the elements in the array.

    Array response_array = post_response.Split('|');
    resultSpan.InnerHtml += "<OL> \n";
    foreach (string value in response_array)
    {
        resultSpan.InnerHtml += "<LI>" + value + "&nbsp;</LI> \n";
    }
    resultSpan.InnerHtml += "</OL> \n";

Array index starts at 0, so response_array[6] actually points to CC — Shadow
– Shadow, Commented Oct 29, 2014 at 5:01
thank you, even with that i get the same error Error 6 Cannot apply indexing with [] to an expression of type 'System.Array' — user3345212
– user3345212, Commented Oct 29, 2014 at 5:40

Peter Duniho · Accepted Answer · 2014-10-29 05:05:51Z

4

The question is unclear and seemingly self-contradictory. Why have a foreach loop if you only want one element from the result? And at the very least, you ought to be using a strongly-typed string[] instead of Array. That said, this version of your code might work for you:

string[] response_array = post_response.Split('|');
resultSpan.InnerHtml += "<OL> \n";
resultSpan.InnerHtml += "<LI>" + response_array[6] + "&nbsp;</LI> \n";
resultSpan.InnerHtml += "</OL> \n";

If that doesn't address your question, you should improve your question by being more specific, and also including the exact text of any warnings or errors you get.

EDIT: use 5 as the array index instead of 6 if your original data example showed the whole result of the call to Split() (i.e. you mis-numbered the array indexes).

edited Oct 29, 2014 at 5:05

answered Oct 29, 2014 at 4:59

Peter Duniho

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5 Comments

Peter Duniho Over a year ago

@JeanF.: I respectfully disagree with the suggestion to use "var". The use of "var" in contexts where the inferred type is not obvious from reading the code has no place in good, readable C# code. I prefer the .NET naming conventions, but I'd rather not further disorient a questioner by changing variable names on them.

Jean F. Over a year ago

I understand your point of view but string.Split returns obviously a string[]. The type can be easily inferred. Using "var" makes the code easier to maintain and doesn't really impact readability. Re-sharper and StyleCop seem to agree with me but both consideration are right I guess.

user3345212 Over a year ago

Hello sir, thank you for the answer, I am geting the following error:Error 6 Cannot apply indexing with [] to an expression of type 'System.Array'

Jean F. Over a year ago

Don't use Array as a type, Array itself doesn't have an indexer. Use a base class like string[], int[], ...

user3345212 Over a year ago

Thank you Jean, my issue got solved, and thank you Peter, your code work with the suggestion Jean gave. Much appreciated.

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