Merge pull request #13 from MicrosoftLearning/lp6-m2-eric

Lp6 m2 eric

Author: eric-camplin

DownloadableCodeProjects/LP6_implement-delegates-events/Events/Solution/Counter.cs

@@ -0,0 +1,39 @@
+public class Counter
+{
+    public int Total { get; private set; }
+    public int Threshold { get; set; }
+
+    public Counter(int threshold)
+    {
+        Threshold = threshold;
+        Total = 0;
+    }
+
+    public void Add(int value)
+    {
+        Total += value;
+        Console.WriteLine($"Current Total: {Total}"); // Debugging output
+        if (Total >= Threshold)
+        {
+            var args = new ThresholdReachedEventArgs
+            {
+                Threshold = Threshold,
+                TimeReached = DateTime.Now
+            };
+            OnThresholdReached(args);
+        }
+    }
+
+    public event EventHandler<ThresholdReachedEventArgs> ThresholdReached = delegate { };
+
+    protected virtual void OnThresholdReached(ThresholdReachedEventArgs e)
+    {
+        ThresholdReached?.Invoke(this, e);
+    }
+}
+
+public class ThresholdReachedEventArgs : EventArgs
+{
+    public int Threshold { get; set; }
+    public DateTime TimeReached { get; set; }
+}

DownloadableCodeProjects/LP6_implement-delegates-events/Events/Solution/CounterApp.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

DownloadableCodeProjects/LP6_implement-delegates-events/Events/Solution/Program.cs

@@ -0,0 +1,27 @@
+var counter = new Counter(10);
+
+// Subscribe to the ThresholdReached event
+counter.ThresholdReached += Counter_ThresholdReached;
+
+// Increment the counter interactively
+Console.WriteLine("Press 'a' to add 1 to the counter or 'q' to quit.");
+while (true)
+{
+    var key = Console.ReadKey(true).KeyChar;
+    if (key == 'a')
+    {
+        counter.Add(1);
+    }
+    else if (key == 'q')
+    {
+        break;
+    }
+}
+
+// Unsubscribe from the ThresholdReached event
+counter.ThresholdReached -= Counter_ThresholdReached;
+
+static void Counter_ThresholdReached(object? sender, ThresholdReachedEventArgs e)
+{
+    Console.WriteLine($"Threshold of {e.Threshold} reached at {e.TimeReached}.");
+}