Exception information logging

Eve-O-Preview/ApplicationBase/ExceptionHandler.cs

@@ -0,0 +1,50 @@
+using System;
+using System.IO;
+using System.Threading;
+using System.Windows.Forms;
+
+namespace EveOPreview
+{
+	// A really very primitive exception handler stuff here
+	// No IoC, no fancy DI containers - just a plain exception stacktrace dump
+	// If this code is called then something was gone really bad
+	// so even the DI infrastructure might be dead already.
+	// So this dumb and non elegant approach is used
+	sealed class ExceptionHandler
+	{
+		private const string ExceptionDumpFileName = "EVE-O Preview.log";
+		private const string ExceptionMessage = "EVE-O Preview has encountered a problem and needs to close. Additional information has been saved in the crash log file.";
+
+		public void SetupExceptionHandlers()
+		{
+			Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException);
+			Application.ThreadException += delegate (Object sender, ThreadExceptionEventArgs e)
+			{
+				this.ExceptionEventHandler(e.Exception);
+			};
+
+			AppDomain.CurrentDomain.UnhandledException += delegate (Object sender, UnhandledExceptionEventArgs e)
+			{
+				this.ExceptionEventHandler(e.ExceptionObject as Exception);
+			};
+		}
+
+		private void ExceptionEventHandler(Exception exception)
+		{
+			try
+			{
+				String exceptionMessage = exception.ToString();
+				File.WriteAllText(ExceptionHandler.ExceptionDumpFileName, exceptionMessage);
+
+				MessageBox.Show(ExceptionHandler.ExceptionMessage, @"EVE-O Preview", MessageBoxButtons.OK, MessageBoxIcon.Error);
+			}
+			catch
+			{
+				// We are in unstable state now so even this operation might fail
+				// Still we actually don't care anymore - anyway the application has been cashed
+			}
+
+			System.Environment.Exit(1);
+		}
+	}
+}