Improve single file conversion

Author: imJack6

TraverseFolderEncoded/Program.cs

@@ -9,7 +9,7 @@ internal abstract class Program
     static async Task Main(string[] args)
     {
         Console.WriteLine("Welcome to use TraverseFolderEncoded!");
-        if (args.Length != 2)
+        if (args.Length != 2)   // 判断启动参数是否正确
         {
             Console.WriteLine("Incorrect startup parameters.");
             Console.WriteLine("Example: TraverseFolderEncoded.exe [Encoded(utf-8/gbk/gb2312/65001...)] [File/Folder Path]");
@@ -18,54 +18,77 @@ static async Task Main(string[] args)
         }
         else
         {
-            string folderPath = args[1]; // 指定文件夹路径
-            string targetEncodingStringName = args[0]; // 指定目标编码名称
-            int.TryParse(args[0], out var targetEncodingIntName);
-            Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
-            // 获取文件夹中的所有文件
-            string[] files = Directory.GetFiles(folderPath, "*", SearchOption.AllDirectories);
-
-            Encoding targetEncoding;
-            if (targetEncodingIntName != 0)
-                targetEncoding = Encoding.GetEncoding(targetEncodingIntName);
-            else
+            string path = args[1];  // 指定路径
+            string targetEncodingStringName = args[0];  // 指定目标编码名称
+            int.TryParse(args[0], out var targetEncodingIntName);   // 判断是否为数字，如果是则使用数字作为目标编码
+            Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);  // 注册编码
+            Encoding targetEncoding;    // 目标编码
+            if (targetEncodingIntName != 0) // 如果是数字则使用数字作为目标编码
+                targetEncoding = Encoding.GetEncoding(targetEncodingIntName);   
+            else   // 如果不是数字则使用名称作为目标编码
                 targetEncoding = Encoding.GetEncoding(targetEncodingStringName);
-            int totalTicks = files.Length;
-            var options = new ProgressBarOptions
-                {
-                    // 设置前景色
-                    ForegroundColor = ConsoleColor.Yellow,
-                    // 设置完成时的前景色
-                    ForegroundColorDone = ConsoleColor.DarkGreen,
-                    // 设置背景色
-                    BackgroundColor = ConsoleColor.DarkGray,
-                    // 设置背景字符
-                    BackgroundCharacter = '\u2593'
-                };
-            Stopwatch stopwatch = new Stopwatch();
-            using (var pbar = new ProgressBar(totalTicks, "Processing", options))
+            Stopwatch stopwatch = new Stopwatch();  // 计时器
+            
+            if (File.Exists(path))  // 判断路径是否为文件
             {
-                //double percent = 100.00 / files.Length;
                 stopwatch.Start();
-                // 遍历所有文件并修改编码
-                foreach (string file in files)
+                // 读取文件内容
+                byte[] bytes = File.ReadAllBytes(path);
+                // 将文件内容从原编码转换为目标编码
+                Encoding sourceEncoding = Encoding.Default; // 自动检测原编码
+                byte[] targetBytes = Encoding.Convert(sourceEncoding, targetEncoding, bytes);
+                // 将转换后的内容写入文件
+                File.WriteAllBytes(path, targetBytes);
+                Console.WriteLine("File {0} have been converted to {1} encoding, taking time {2}",
+                    path, targetEncoding.EncodingName, stopwatch.Elapsed);
+                stopwatch.Stop();
+            }
+            else if (Directory.Exists(path))    // 判断路径是否为文件夹
+            {
+                // 获取文件夹中的所有文件
+                string[] files = Directory.GetFiles(path, "*", SearchOption.AllDirectories);
+                
+                int totalTicks = files.Length;
+                var options = new ProgressBarOptions
+                    {
+                        // 设置前景色
+                        ForegroundColor = ConsoleColor.Yellow,
+                        // 设置完成时的前景色
+                        ForegroundColorDone = ConsoleColor.DarkGreen,
+                        // 设置背景色
+                        BackgroundColor = ConsoleColor.DarkGray,
+                        // 设置背景字符
+                        BackgroundCharacter = '\u2593'
+                    };
+                using (var pbar = new ProgressBar(totalTicks, "Processing", options))
                 {
-                    pbar.Message = $"Start {Array.IndexOf(files, file) + 1} of {files.Length}: {file}";
-                    // 读取文件内容
-                    byte[] bytes = File.ReadAllBytes(file);
-                    // 将文件内容从原编码转换为目标编码
-                    Encoding sourceEncoding = Encoding.Default; // 自动检测原编码
-                    byte[] targetBytes = Encoding.Convert(sourceEncoding, targetEncoding, bytes);
-                    await Task.Delay(1);
-                    // 将转换后的内容写入文件
-                    File.WriteAllBytes(file, targetBytes);
-                    pbar.Tick($"End {Array.IndexOf(files, file) + 1} of {files.Length}: {file}");
+                    //double percent = 100.00 / files.Length;
+                    stopwatch.Start();
+                    // 遍历所有文件并修改编码
+                    foreach (string file in files)
+                    {
+                        pbar.Message = $"Start {Array.IndexOf(files, file) + 1} of {files.Length}: {file}";
+                        // 读取文件内容
+                        byte[] bytes = File.ReadAllBytes(file);
+                        // 将文件内容从原编码转换为目标编码
+                        Encoding sourceEncoding = Encoding.Default; // 自动检测原编码
+                        byte[] targetBytes = Encoding.Convert(sourceEncoding, targetEncoding, bytes);
+                        await Task.Delay(1);
+                        // 将转换后的内容写入文件
+                        File.WriteAllBytes(file, targetBytes);
+                        pbar.Tick($"End {Array.IndexOf(files, file) + 1} of {files.Length}: {file}");
+                    }
+                    stopwatch.Stop();
                 }
-                stopwatch.Stop();
+
+                Console.WriteLine("All files have been converted to {0} encoding, taking time {1}",
+                    targetEncoding.EncodingName, stopwatch.Elapsed);
+            }
+            else   // 路径无效
+            {
+                Console.WriteLine("The path is invalid.");
             }
 
-            Console.WriteLine("All files have been converted to {0} encoding, taking time {1}",
-                targetEncoding.EncodingName, stopwatch.Elapsed);
             Console.Write("Press any key to exit...");
             Console.ReadKey();
         }