Generics - DictionaryList
Introduction
A DictionaryList is another type of generic class. It works much like a dictionary in that you declare a <Key, Value> pair. As this topic is not normally coved in this course, the code provided is to be used at your own expense.
namespace DictionaryListDemo
{
class Program
{
static void Main(string[] args)
{
Setup();
// Create a DictionaryList (Dictionary<Key, Value>)
Dictionary<string, int> numbers = new Dictionary<string, int>();
// Add data to the DictionaryList
numbers.Add("one", 1);
numbers.Add("two", 2);
numbers.Add("three", 3);
numbers.Add("four", 4);
numbers.Add("five", 5);
// Display the DictionaryList
DisplayDictionaryList(numbers);
// Do some stuff with the DictionaryList
DictionaryMath(numbers);
Console.ReadLine();
}//eom
static void DisplayDictionaryList(Dictionary<string, int> numbers)
{
// use a foreach loop
foreach(KeyValuePair<string, int> pair in numbers)
{
Console.WriteLine("{0}\t= {1,2}", pair.Key, pair.Value);
}
}//end of DisplayDictionaryList
static void DictionaryMath(Dictionary<string,int> numbers)
{
string string1,
string2, stringResult;
int number1,
number2,
intResult;
Console.WriteLine("\nDictionary Math");
Console.Write("Enter 1st number: ");
string1 = Console.ReadLine();
Console.Write("Enter 2nd number: ");
string2 = Console.ReadLine();
if (numbers.ContainsKey(string1) && numbers.ContainsKey(string2))
{
number1 = numbers[string1];
number2 = numbers[string2];
intResult = number1 + number2;
if (numbers.ContainsValue(intResult))
{
stringResult = numbers.ElementAt(intResult - 1).Key;
Console.WriteLine("{0} + {1} = {2}", string1, string2, stringResult);
}//end if
else
{
Console.WriteLine("Result ({0}) not found", intResult);
}//end else
}//end if
else
{
Console.WriteLine("No math possible using {0} and {1}", string1, string2);
}//end else
}//end of DictionaryMath
static void Setup()
{
Console.Title = "Dictionary List Demo";
Console.ForegroundColor = ConsoleColor.Black;
Console.BackgroundColor = ConsoleColor.White;
Console.Clear();
}//end of Setup
}//eoc
}//eon
