FEATURE: Add loading bar

WindowsKeyFinder/LoadingBar.cs

@@ -0,0 +1,106 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading;
+
+namespace WindowsKeyFinder
+{
+	/// <summary>
+	/// An ASCII progress bar
+	/// </summary>
+	public class ProgressBar : IDisposable, IProgress<double>
+	{
+		private const int blockCount = 10;
+		private readonly TimeSpan animationInterval = TimeSpan.FromSeconds(1.0 / 8);
+		private const string animation = @"|/-\";
+
+		private readonly Timer timer;
+
+		private double currentProgress = 0;
+		private string currentText = string.Empty;
+		private bool disposed = false;
+		private int animationIndex = 0;
+
+		public ProgressBar()
+		{
+			timer = new Timer(TimerHandler);
+
+			// A progress bar is only for temporary display in a console window.
+			// If the console output is redirected to a file, draw nothing.
+			// Otherwise, we'll end up with a lot of garbage in the target file.
+			if (!Console.IsOutputRedirected)
+			{
+				ResetTimer();
+			}
+		}
+
+		public void Report(double value)
+		{
+			// Make sure value is in [0..1] range
+			value = Math.Max(0, Math.Min(1, value));
+			Interlocked.Exchange(ref currentProgress, value);
+		}
+
+		private void TimerHandler(object state)
+		{
+			lock (timer)
+			{
+				if (disposed) return;
+
+				int progressBlockCount = (int)(currentProgress * blockCount);
+				int percent = (int)(currentProgress * 100);
+				string text = string.Format("[{0}{1}] {2,3}% {3}",
+					new string('#', progressBlockCount), new string('-', blockCount - progressBlockCount),
+					percent,
+					animation[animationIndex++ % animation.Length]);
+				UpdateText(text);
+
+				ResetTimer();
+			}
+		}
+
+		private void UpdateText(string text)
+		{
+			// Get length of common portion
+			int commonPrefixLength = 0;
+			int commonLength = Math.Min(currentText.Length, text.Length);
+			while (commonPrefixLength < commonLength && text[commonPrefixLength] == currentText[commonPrefixLength])
+			{
+				commonPrefixLength++;
+			}
+
+			// Backtrack to the first differing character
+			StringBuilder outputBuilder = new StringBuilder();
+			outputBuilder.Append('\b', currentText.Length - commonPrefixLength);
+
+			// Output new suffix
+			outputBuilder.Append(text.Substring(commonPrefixLength));
+
+			// If the new text is shorter than the old one: delete overlapping characters
+			int overlapCount = currentText.Length - text.Length;
+			if (overlapCount > 0)
+			{
+				outputBuilder.Append(' ', overlapCount);
+				outputBuilder.Append('\b', overlapCount);
+			}
+
+			Console.Write(outputBuilder);
+			currentText = text;
+		}
+
+		private void ResetTimer()
+		{
+			timer.Change(animationInterval, TimeSpan.FromMilliseconds(-1));
+		}
+
+		public void Dispose()
+		{
+			lock (timer)
+			{
+				disposed = true;
+				UpdateText(string.Empty);
+			}
+		}
+
+	}
+}

WindowsKeyFinder/Program.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Threading;
 
 namespace WindowsKeyFinder
 {
@@ -8,34 +9,47 @@ class Program
         static void Main(string[] args)
         {
 
+            Windows productKey = null;
+
+            try
+            {
+                productKey = new Windows();
+                productKey.FindProductKeyClick();
+
+            }
+            catch (Exception ex)
+            { 
+                Console.WriteLine(ex.Message); 
+            }
+
 
-            Windows productKey = new Windows();
 
-            productKey.FindProductKeyClick();
 
             Console.ForegroundColor = ConsoleColor.DarkGreen;
 
+            Console.Write("Fetching the key from your device... ");
+            using (var progress = new ProgressBar())
+            {
+                for (int i = 0; i <= 200; i++)
+                {
+                    progress.Report((double)i / 200);
+                    Thread.Sleep(5);
+                }   
+            }
+            Console.WriteLine("Done.");
+
 
             Console.WriteLine("-------------------------------------------------------------------------------------");
-            Console.WriteLine("|\tWelcome to Windows Product Key Finder!                                      |");
-            Console.WriteLine("|                                                                                   |");
-            Console.WriteLine("|                                                                                   |");
-            Console.WriteLine("|                                                                                   |");
-            Console.WriteLine("|                                                                                   |");
+            Console.WriteLine("|\tWelcome to Windows Product Key Finder!                                      |");                                                                         
             Console.WriteLine("|\tHere is your Windows Key:                                                   |");
             Console.WriteLine("|                                                                                   |");
             Console.WriteLine($"|                            {productKey.Key}                          |");
-            Console.WriteLine("|                                                                                   |");
-            Console.WriteLine("|                                                                                   |");
-            Console.WriteLine("|                                                                                   |");
-            Console.WriteLine("|                                                                                   |");
             Console.WriteLine("|                                                                    - Kenji T.     |");
             Console.WriteLine("-------------------------------------------------------------------------------------");
-
-
-
-
-
+            Console.WriteLine("\n\n");
+            Console.WriteLine("Link to source code: ");
+            Console.WriteLine("\thttps://github.com/kenjitagawa/WindowsKeyFinder");
+            Console.WriteLine("\n");
             Console.Write("Press any key to quit.");
             Console.ReadKey();
 

WindowsKeyFinder/Windows.cs

@@ -91,9 +91,13 @@ public void FindProductKeyClick()
             byte[] id = null;
             var regKey = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion");
 
-            if (regKey != null) id = regKey.GetValue("DigitalProductId") as byte[];
-
-            m_productKey = DecodeKey(id);
+            if (regKey != null)
+            {
+                id = regKey.GetValue("DigitalProductId") as byte[];
+                m_productKey = DecodeKey(id);
+            }
+            else
+                return;
         }
 
     }

WindowsKeyFinder/WindowsKeyFinder.csproj

@@ -7,7 +7,6 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Win32.Registry" Version="5.0.0" />
-    <PackageReference Include="Xamarin.Essentials" Version="1.7.1" />
   </ItemGroup>
 
 </Project>