Command line arguments added.

Program.cs

@@ -1,40 +1,60 @@
-using System;
-using System.Collections.Generic;
+using System;
 using static System.IO.Path;
 
-namespace SL3Reader
-{
-    public static class Program
-    {
-        public static void Main(string[] args)
-        {
-            if (args.Length != 2)
-            {
-                Console.WriteLine(@"Usage example: SL3Reader.exe C:\input.sl3 D:\output.csv");
+namespace SL3Reader {
+
+    public static class Program {
+        public static void Main(string[] args) {
+            if (args.Length != 3) {
+                PrintUsage();
                 return;
             }
 
             string input = GetFullPath(args[0]);
-            if(!Exists(input))
-            {
+            if (!Exists(input)) {
                 Console.WriteLine("Input file not found!");
+                PrintUsage();
                 return;
             }
 
             string output = GetFullPath(args[1]);
-            if (!Exists(GetDirectoryName(output)))
-            {
+            if (!Exists(GetDirectoryName(output))) {
                 Console.WriteLine("Directory not found for the output file!");
+                PrintUsage();
                 return;
             }
 
             using SL3Reader sl3reader = new(input);
 
-            sl3reader.Export3D(output);
-            //sl3reader.ExportImagery(@"F:\SS\", SurveyType.DownScan);
-            //sl3reader.ExamineUnknown8Datasets();
+            string expSelector = args[2].Trim().ToLowerInvariant();
+            switch (expSelector) {
+                case "-3d":
+                    sl3reader.Export3D(output);
+                    break;
+                case "-route":
+                    sl3reader.ExportToCSV(output);
+                    break;
+                default:
+                    Console.WriteLine("Invalid third argument (" + expSelector + ").");
+                    PrintUsage();
+                    return;
+            }
+
+            PrintSummary();
+
+            return;
 
-            //sl3reader.ExportToCSV(output);
+            static void PrintUsage() {
+                Console.WriteLine("Usage examples:");
+                Console.WriteLine("To export 3D points: SL3Reader.exe \"C:\\input.sl3\" \"D:\\output.csv\" -3d");
+                Console.WriteLine("To export route:     SL3Reader.exe \"C:\\input.sl3\" \"D:\\output.csv\" -route");
+            }
+
+            void PrintSummary() {
+                Console.WriteLine("Number of frames: " + sl3reader.Frames.Count.ToString());
+                Console.WriteLine("Number of 3D frames: " + sl3reader.IndexByType[SurveyType.ThreeDimensional].Count.ToString());
+                Console.WriteLine("\nExport finished successfully.");
+            }
         }
     }
-}
+}