How to use two arrays in one foreach loop using C#

Question

How would I loop through two arays using a foreach loop? I found this previously, but that's for PHP not c#

$images = array('image1', 'image2', ...);
$descriptions = array('description1', 'description2', ...);

foreach (array_combine($images, $descriptions) as $image => $desc) {
  echo $image, $desc;
}

my thought is to have something like the following

string[] ValueA = {1,2,3}
string[] ValueB = (a,b,c}

foreach(something here from ValueA && ValueB)
{
   methodNameHere(ValueA, ValueB); //method I am calling requires the two values
}

You can't do that in c#. What exactly do you try to accomplish? — Kram
– Kram, Commented Jun 25, 2015 at 15:20
if each array is going to be the same size you can just use a for loop and get each index at the same spot and call the method that way? — Derek
– Derek, Commented Jun 25, 2015 at 15:24
Oh well, the closest you can get to PHP is using dictionaries, but I don't see how far you can go, a for loop with a flag can be absolutely enough. — briosheje
– briosheje, Commented Jun 25, 2015 at 15:25
basically I wanted to combine to sets of data , I can do this manually but I think it will be much better if done with an array so that it walks through each set of data — Jerry Mbawa
– Jerry Mbawa, Commented Jun 25, 2015 at 15:26

Saeed Rahmani · Accepted Answer · 2015-06-25 15:33:14Z

2

You will be Zip operation that come in .Net 4 in feature. This on link1 and link2 is description.

You will be right something like:

var alpha = new [] { A, B, C, D };
var day = new [] { "s", "s", "m", "t" };

var  alphasAndDays =  alpha.Zip(day, (n, w) => new { Alpha = n, Day = w });
foreach(var ad in  alphasAndDays)
{
   Console.WriteLine(aw.Alpha + aw.Day);
}

answered Jun 25, 2015 at 15:33

Saeed Rahmani

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1 Comment

Jerry Mbawa Over a year ago

gave it go didnt get expected results, please note inside foreach I am running methodNameHere(ValueA, ValueB) not concatenating the two

mmr · Accepted Answer · 2015-07-02 08:21:51Z

0

A simple reiteration can do that:

 class Program
{
    static void Main(string[] args)
    {
        string[] setA = new string[3] {"1", "2", "3"};
        string[] setB = new string[3] { "a", "b", "c" };

        foreach (string val1 in setA) {

            foreach (string val2 in setB) {

                Program test = new Program();
                String printer = test.concatString(val1, val2);

                Console.WriteLine(printer);

            }
        }

        Console.ReadLine();

    }

    public string concatString(string value1, string value2) {

         String value3 = value1 + value2;
         return value3;
    }
}

answered Jul 2, 2015 at 8:21

mmr

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Comments

Jerry Mbawa · Accepted Answer · 2015-07-31 08:56:53Z

0

 int[] numbers = { 1, 2, 3, 4 };
            string[] words = { "one", "two", "three" };

            var numbersAndWords = numbers.Zip(words, (first, second) => first + " " + second);

            foreach (var item in numbersAndWords)
                Console.WriteLine(item);

            // This code produces the following output: 

            // 1 one 
            // 2 two 
            // 3 three

answered Jul 31, 2015 at 8:56

Jerry Mbawa

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