// http://svc.luckstar.com.tw/CodeHelper/cs/index.html
// 2017-03-25, honda@luckstar.com.tw, Create.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
// add
using System.Collections.Specialized;
using System.Collections;

namespace ConsoleBase
{
    public class CStringDictionary
    {
        StringDictionary mList1 = new StringDictionary();

        public void Run()
        {
            Console.WriteLine("Basic of StringDictionary:");
            // Creates and initializes a new StringDictionary.
            mList1.Add("red", "rojo");
            mList1.Add("green", "verde");
            mList1.Add("blue", "azul");

            // Display the contents of the collection using foreach. This is the preferred method.
            Console.WriteLine("Displays the elements using foreach:");
            PrintKeysAndValues1(mList1);

            // Display the contents of the collection using the enumerator.
            Console.WriteLine("Displays the elements using the IEnumerator:");
            PrintKeysAndValues2(mList1);

            // Display the contents of the collection using the Keys, Values, Count, and Item properties.
            Console.WriteLine("Displays the elements using the Keys, Values, Count, and Item properties:");
            PrintKeysAndValues3(mList1);

            // Copies the StringDictionary to an array with DictionaryEntry elements.
            DictionaryEntry[] myArr = new DictionaryEntry[mList1.Count];
            mList1.CopyTo(myArr, 0);

            // Displays the values in the array.
            Console.WriteLine("Displays the elements in the array:");
            Console.WriteLine("   KEY        VALUE");
            for (int i = 0; i < myArr.Length; i++)
                Console.WriteLine("   {0,-10} {1}", myArr[i].Key, myArr[i].Value);
            Console.WriteLine();

            // Searches for a value.
            if (mList1.ContainsValue("amarillo"))
                Console.WriteLine("The collection contains the value \"amarillo\".");
            else
                Console.WriteLine("The collection does not contain the value \"amarillo\".");
            Console.WriteLine();

            // Searches for a key and deletes it.
            if (mList1.ContainsKey("green"))
                mList1.Remove("green");
            Console.WriteLine("The collection contains the following elements after removing \"green\":");
            PrintKeysAndValues1(mList1);

            // Clears the entire collection.
            mList1.Clear();
            Console.WriteLine("The collection contains the following elements after it is cleared:");
            PrintKeysAndValues1(mList1);
        }
        private void PrintDashLine()
        {
            Console.WriteLine();
            Console.WriteLine("----------");
        }

        // Uses the foreach statement which hides the complexity of the enumerator.
        // NOTE: The foreach statement is the preferred way of enumerating the contents of a collection.
        public static void PrintKeysAndValues1(StringDictionary sd1)
        {
            Console.WriteLine("   KEY                       VALUE");
            foreach (DictionaryEntry de in sd1)
                Console.WriteLine("   {0,-25} {1}", de.Key, de.Value);
            Console.WriteLine();
        }

        // Uses the enumerator. 
        // NOTE: The foreach statement is the preferred way of enumerating the contents of a collection.
        public static void PrintKeysAndValues2(StringDictionary sd1)
        {
            IEnumerator myEnumerator = sd1.GetEnumerator();
            DictionaryEntry de;
            Console.WriteLine("   KEY                       VALUE");
            while (myEnumerator.MoveNext())
            {
                de = (DictionaryEntry)myEnumerator.Current;
                Console.WriteLine("   {0,-25} {1}", de.Key, de.Value);
            }
            Console.WriteLine();
        }

        // Uses the Keys, Values, Count, and Item properties.
        public static void PrintKeysAndValues3(StringDictionary sd1)
        {
            String[] myKeys = new String[sd1.Count];
            sd1.Keys.CopyTo(myKeys, 0);

            Console.WriteLine("   INDEX KEY                       VALUE");
            for (int i = 0; i < sd1.Count; i++)
                Console.WriteLine("   {0,-5} {1,-25} {2}", i, myKeys[i], sd1[myKeys[i]]);
            Console.WriteLine();
        }

    }
}



result:

Basic of StringDictionary:
Displays the elements using foreach:
   KEY                       VALUE
   green                     verde
   red                       rojo
   blue                      azul

Displays the elements using the IEnumerator:
   KEY                       VALUE
   green                     verde
   red                       rojo
   blue                      azul

Displays the elements using the Keys, Values, Count, and Item properties:
   INDEX KEY                       VALUE
   0     green                     verde
   1     red                       rojo
   2     blue                      azul

Displays the elements in the array:
   KEY        VALUE
   green      verde
   red        rojo
   blue       azul

The collection does not contain the value "amarillo".

The collection contains the following elements after removing "green":
   KEY                       VALUE
   red                       rojo
   blue                      azul

The collection contains the following elements after it is cleared:
   KEY                       VALUE