Question

Up to this moment I was using simple arrays to enter and get necessary information.

the first example is following:

            // ===Example 1. Enter info ////
            string[] testArr1 = null;
            testArr1[0] = "ab";
            testArr1[1] = "2";
            // ===Example 1. GET info ////
            string teeext = testArr1[0];
            // =======================

and the second example:

            // ====== Example 2. Enter info ////
            string[][] testArr2 = null;
            List<int> listTest = new List<int>();
            listTest.Add(1);
            listTest.Add(3);
            listTest.Add(7);
            foreach (int listitem in listTest)
            {
                testArr2[listitem][0] = "yohoho";
            }
            // ====== Example 2. Get info ////
            string teeext2 = testArr2[0][0];
            // =======================

But right now I’m trying to assign an identification number to each array, so I could identify multiple different arrays in one ConcurrentDictionary.

How do you Enter and Get info out of array in dictionary?

Look, we have two identifiers and two dictionaries:

            decimal identifier1 = 254;
            decimal identifier2 = 110;
            ConcurrentDictionary<decimal, string[]> test1 = new ConcurrentDictionary<decimal, string[]>();
            ConcurrentDictionary<decimal, string[][]> test2 = new ConcurrentDictionary<decimal, string[][]>();

I was imagining something like this:

//////////Example 1
//To write info
test1.TryAdd(identifier1)[0] = "a";
test1.TryAdd(identifier1)[1] = "b11";

test1.TryAdd(identifier2)[0] = "152";
//to get info
string value1 = test1.TryGetValue(identifier1)[0];
string value1 = test1.TryGetValue(identifier2)[0];

//////////Example 2
//To write info: no idea
//to get info: no idea

P.S.: The code above doesn’t work (since it’s self-made).. so what’s the right way to enter information into string[] and string[][] in ConcurrentDictionary by an ID? (and to get it out)

Answer 1

Given your declarations

decimal identifier1 = 254;
decimal identifier2 = 110;
ConcurrentDictionary<decimal, string[]> test1 = new ConcurrentDictionary<decimal, string[]>();
ConcurrentDictionary<decimal, string[][]> test2 = new ConcurrentDictionary<decimal, string[][]>();

you can use code like this

  test1[identifier1] = new string[123];
  test1[identifier1][12] = "hello";

  test2[identifier2] = new string[10][];
  test2[identifier2][0] = new string[20];
  test2[identifier2][0][1] = "world";

to enter your data. Here’s an example of accessing the data you entered:

  Console.WriteLine(test1[identifier1][12] + " " + test2[identifier2][0][1]);

I must say, though, that such code tends to be quite convoluted and difficult to debug, especially for the test2 case. Are you sure you want to use jagged arrays?