『SOLID 重構挑戰練習』2. 使用 資料字典 來重構程式碼

using System;
	using System.Collections.Generic;
	using System.Drawing;
	namespace RefactorSwitchDictionary
	{
	public class StringToColor
	{
	public Color Transfer(string name)
	{
	Color transferResult;
	switch (name.ToLower())
	{
	case "red":
	transferResult = Color.FromArgb(0xFF, 0xFF, 0x00, 0x00);
	break;
	case "green":
	transferResult = Color.FromArgb(0xFF, 0x80, 0x80, 0x80);
	break;
	case "blue":
	transferResult = Color.FromArgb(0xFF, 0x00, 0x00, 0xFF);
	break;
	default:
	throw new ArgumentException("不正確的顏色名稱");
	}
	return transferResult;
	}
	}
	namespace RefactorSwitchDictionary.Refactoring
	{
	#region 將不同顏色名稱轉換方法之表示式，透過資料字典來儲存
	public class StringToColor
	{
	Dictionary<string, Color> ColorMaps;
	public StringToColor()
	{
	ColorMaps = new Dictionary<string, Color>()
	{
	{"Red", Color.FromArgb(0xFF, 0xFF, 0x00, 0x00)},
	{"Green", Color.FromArgb(0xFF, 0x80, 0x80, 0x80) },
	{"Blue", Color.FromArgb(0xFF, 0x00, 0x00, 0xFF)}
	};
	}
	public Color Transfer(string name)
	{
	if (!ColorMaps.ContainsKey(name))
	throw new ArgumentException("不正確的顏色名稱");
	return ColorMaps[name];
	}
	}
	#endregion
	}
	class Program
	{
	static void Main(string[] args)
	{
	string MyColorName = "Blue";
	Console.WriteLine("使用 Swith 來設計方法");
	StringToColor foo = new StringToColor();
	Color fooColor = foo.Transfer(MyColorName);
	Console.WriteLine($"{MyColorName} = A:{fooColor.A} R:{fooColor.R} G:{fooColor.G} B:{fooColor.B}");
	Console.WriteLine("Press any key for continuing...");
	Console.ReadKey();
	Console.WriteLine("使用 資料字典 來重構方法，進行 Swith 需求設計");
	RefactorSwitchDictionary.Refactoring.StringToColor fooRefactoring = new RefactorSwitchDictionary.Refactoring.StringToColor();
	Color fooRefactoringColor = fooRefactoring.Transfer(MyColorName);
	Console.WriteLine($"{MyColorName} = A:{fooRefactoringColor.A} R:{fooRefactoringColor.R} G:{fooRefactoringColor.G} B:{fooRefactoringColor.B}");
	Console.WriteLine("Press any key for continuing...");
	Console.ReadKey();
	}
	}
	}