Created
September 19, 2012 20:09
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Implicit Dependencies in C#
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using System; | |
using System.IO; | |
using System.Linq; | |
namespace ImplicitDependencies | |
{ | |
class Program | |
{ | |
static void Main(string[] args) | |
{ | |
var customer = new Customer() | |
{ | |
FavoriteColor = "Blue", | |
Title = "Mr.", | |
Fullname = "Steve Smith" | |
}; | |
Context.CurrentCustomer = customer; | |
var response = new PersonalizedResponse(); | |
Console.WriteLine(response.GetResponse()); | |
Console.ReadLine(); | |
} | |
} | |
public static class Context | |
{ | |
public static Customer CurrentCustomer { get; set; } | |
public static void Log(string message) | |
{ | |
using (StreamWriter logFile = new StreamWriter( | |
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), | |
"logfile.txt"))) | |
{ | |
logFile.WriteLine(message); | |
} | |
} | |
} | |
public class Customer | |
{ | |
public string FavoriteColor { get; set; } | |
public string Title { get; set; } | |
public string Fullname { get; set; } | |
} | |
public class PersonalizedResponse | |
{ | |
public string GetResponse() | |
{ | |
Context.Log("Generating personalized response."); | |
string formatString = "Good {0}, {1} {2}! Would you like a {3} widget today?"; | |
string timeOfDay = "afternoon"; | |
if (DateTime.Now.Hour < 12) | |
{ | |
timeOfDay = "morning"; | |
} | |
if (DateTime.Now.Hour > 17) | |
{ | |
timeOfDay = "evening"; | |
} | |
return String.Format(formatString, timeOfDay, | |
Context.CurrentCustomer.Title, | |
Context.CurrentCustomer.Fullname, | |
Context.CurrentCustomer.FavoriteColor); | |
} | |
} | |
} |
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