C Dictionary get item by index

Question

im trying to make a method which return a name of card from my Dictionary randomly   My Dictionary  First definied name of card which is string and second is value of that card  which is int   public static Dictionary lt string  int gt   dict   new Dictionary lt string  int gt                    7   7              8   8              9   9              10   10              J   1              Q   1              K   2              A   11            Method   random is random generated int       public string getCard int random                return Karta  dict random           So the problem is      Cannot convert from  int  to  string    Anybody help me how should i do it right to get the name

User · Answer

Is it useful to look beyond the exact question asked to alternatives that might better suit the need? Create your own class or struct, then make an array of those to operate on instead of being stuck with the operation of the KeyValuePair collection behavior of the Dictionary type.

Using a struct instead of a class will allow equality comparison of two different cards without implementing your own comparison code.

public struct Card
{
  public string Name;
  public int Value;

}

private int random()
{
  // Whatever
  return 1;
}

private static Card[] Cards = new Card[]
{
    new Card() { Name = "7", Value = 7 },
    new Card() { Name = "8", Value = 8 },
    new Card() { Name = "9", Value = 9 },
    new Card() { Name = "10", Value = 10 },
    new Card() { Name = "J", Value = 1 },
    new Card() { Name = "Q", Value = 1 },
    new Card() { Name = "K", Value = 1 },
    new Card() { Name = "A", Value = 1 }
};

private void CardDemo()
{
  int value, maxVal;
  string name;
  Card card, card2;
  List<Card> lowCards;

  value = Cards[random()].Value;
  name = Cards[random()].Name;
  card = Cards[random()];
  card2 = Cards[1];
  // card.Equals(card2) returns true
  lowCards = Cards.Where(x => x.Value == 1).ToList();
  maxVal = Cards.Max(x => x.Value);

}

User · Answer

If you need to extract an element key based on index  this function can be used   public string getCard int random        return Karta  dict ElementAt random  Key      If you need to extract the Key where the element value is equal to the integer generated randomly  you can used the following function   public string getCard int random        return Karta  dict FirstOrDefault x   gt  x Value    random  Key      Side Note  The first element of the dictionary is The Key and the second is the Value

User · Answer

You can take keys or values per index   int value    dict Values ElementAt 5    ElementAt value should be  lt    dict Count - 1 string key    dict Keys ElementAt 5    ElementAt value should be   lt    dict Count - 1

User · Answer

Your key is a string and your value is an int  Your code won t work because it cannot look up the random int you pass  Also  please provide full code

User · Answer

you can easily access elements by index   by use System Linq   Here is the sample  First add using in your class file   using System Linq    Then  yourDictionaryData ElementAt i  Key yourDictionaryData ElementAt i  Value   Hope this helps

[c#] C# Dictionary get item by index

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