解决一些小问题

App.config

@@ -3,4 +3,8 @@
     <startup> 
         <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
     </startup>
+    <runtime>
+        <!-- 启用长路径支持 -->
+        <AppContextSwitchOverrides value="Switch.System.IO.UseLegacyPathHandling=false;Switch.System.IO.BlockLongPaths=false" />
+    </runtime>
 </configuration>

Form1.cs

@@ -28,7 +28,7 @@ namespace MD5Create
         }
 
         // 程序启动前检查目录和版本号
-        private void Start_Button_Click(object sender, EventArgs e)
+        private async void Start_Button_Click(object sender, EventArgs e)
         {
             if (string.IsNullOrWhiteSpace(Path1_Box.Text))
             {
@@ -45,7 +45,7 @@ namespace MD5Create
             // Reset progress bar
             progressBar1.Value = 0;
 
-            GenerateMD5Json(Path1_Box.Text);
+            await Task.Run(() => GenerateMD5Json(Path1_Box.Text));
         }
 
         private void Choose1_Button_Click(object sender, EventArgs e)
@@ -88,14 +88,34 @@ namespace MD5Create
         // 获取目录中文件总数（用于进度计算）
         private int GetTotalFileCount(string directoryPath, string excludeFolder)
         {
-            int count = Directory.GetFiles(directoryPath).Length;
+            int count = 0;
-
+            try
-            foreach (var dir in Directory.GetDirectories(directoryPath))
             {
-                if (dir.Equals(excludeFolder, StringComparison.OrdinalIgnoreCase))
+                count += Directory.GetFiles(directoryPath).Length;
-                    continue;
+            }
+            catch (Exception)
+            {
+                // 忽略无法访问的目录
+            }
 
-                count += GetTotalFileCount(dir, excludeFolder);
+            try
+            {
+                foreach (var dir in Directory.GetDirectories(directoryPath))
+                {
+                    if (dir.Equals(excludeFolder, StringComparison.OrdinalIgnoreCase))
+                        continue;
+
+                    // 跳过符号链接 / Junction
+                    var dirInfo = new DirectoryInfo(dir);
+                    if ((dirInfo.Attributes & FileAttributes.ReparsePoint) != 0)
+                        continue;
+
+                    count += GetTotalFileCount(dir, excludeFolder);
+                }
+            }
+            catch (Exception)
+            {
+                // 同样忽略
             }
             return count;
         }
@@ -103,26 +123,54 @@ namespace MD5Create
         // 生成目录结构的 json 表示
         private Dictionary<string, object> GenerateDirectoryJson(string directoryPath, string rootPath, int totalFiles, ref int processedFiles, string excludeFolder, string fileFolder)
         {
-            var result = new Dictionary<string, object>();
+            var filesDict = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+            var dirsDict = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);
 
             // 处理当前目录文件
-            foreach (var file in Directory.GetFiles(directoryPath))
+            string[] files;
+            try
+            {
+                files = Directory.GetFiles(directoryPath);
+            }
+            catch (Exception ex)
+            {
+                Process_Box.Invoke((MethodInvoker)(() =>
+                {
+                    Process_Box.AppendText($"无法访问目录文件列表 {directoryPath}: {ex.Message}{Environment.NewLine}");
+                }));
+                files = Array.Empty<string>();
+            }
+
+            foreach (var file in files)
             {
-                // 计算文件MD5
-                string fileMD5 = MD5Generation(file);
                 string fileName = Path.GetFileName(file);
-                result[fileName] = fileMD5;
+                string fileMD5;
+                try
+                {
+                    fileMD5 = MD5Generation(file);
+                }
+                catch (Exception ex)
+                {
+                    Process_Box.Invoke((MethodInvoker)(() =>
+                    {
+                        Process_Box.AppendText($"计算MD5失败 {file}: {ex.Message}{Environment.NewLine}");
+                    }));
+                    continue;
+                }
+
+                filesDict[fileName] = fileMD5;
 
                 try
                 {
-                    // 复制文件到fileFolder目录，以MD5值命名且不保留后缀
                     string destPath = Path.Combine(fileFolder, fileMD5);
-                    File.Copy(file, destPath, overwrite: true);
+                    if (!File.Exists(destPath))
-
-                    Process_Box.Invoke((MethodInvoker)(() =>
                     {
-                        Process_Box.AppendText($"已复制: {file} -> {destPath}{Environment.NewLine}");
+                        File.Copy(file, destPath, overwrite: false);
-                    }));
+                        Process_Box.Invoke((MethodInvoker)(() =>
+                        {
+                            Process_Box.AppendText($"已复制: {file} -> {destPath}{Environment.NewLine}");
+                        }));
+                    }
                 }
                 catch (Exception ex)
                 {
@@ -148,16 +196,41 @@ namespace MD5Create
                 }));
             }
 
-            // 递归处理子目录（自动跳过排除文件夹）
+            // 递归处理子目录
-            foreach (var dir in Directory.GetDirectories(directoryPath))
+            string[] subDirs;
+            try
+            {
+                subDirs = Directory.GetDirectories(directoryPath);
+            }
+            catch (Exception ex)
+            {
+                Process_Box.Invoke((MethodInvoker)(() =>
+                {
+                    Process_Box.AppendText($"无法访问子目录列表 {directoryPath}: {ex.Message}{Environment.NewLine}");
+                }));
+                subDirs = Array.Empty<string>();
+            }
+
+            foreach (var dir in subDirs)
             {
                 if (Path.GetFullPath(dir).Equals(Path.GetFullPath(excludeFolder), StringComparison.OrdinalIgnoreCase))
                     continue;
 
+                // 跳过符号链接 / Junction
+                var dirInfo = new DirectoryInfo(dir);
+                if ((dirInfo.Attributes & FileAttributes.ReparsePoint) != 0)
+                    continue;
+
                 string dirName = Path.GetFileName(dir);
-                result[dirName] = GenerateDirectoryJson(dir, rootPath, totalFiles, ref processedFiles, excludeFolder, fileFolder);
+                dirsDict[dirName] = GenerateDirectoryJson(dir, rootPath, totalFiles, ref processedFiles, excludeFolder, fileFolder);
             }
 
+            var result = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase)
+            {
+                { "files", filesDict },
+                { "dirs", dirsDict }
+            };
+
             return result;
         }
 
@@ -178,14 +251,20 @@ namespace MD5Create
         {
             if (!Directory.Exists(rootDirectory))
             {
-                MessageBox.Show("指定的目录不存在！", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                this.Invoke((MethodInvoker)(() =>
+                {
+                    MessageBox.Show("指定的目录不存在！", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                }));
                 return;
             }
 
             try
             {
-                Process_Box.Clear();
+                this.Invoke((MethodInvoker)(() =>
-                progressBar1.Value = 0;
+                {
+                    Process_Box.Clear();
+                    progressBar1.Value = 0;
+                }));
                 Application.DoEvents();
 
                 // 存储MD5值
@@ -222,14 +301,20 @@ namespace MD5Create
                 File.WriteAllText(outputPath, json);
 
                 // 最终更新
-                progressBar1.Value = 100;
+                this.Invoke((MethodInvoker)(() =>
-                Process_Box.AppendText($"\nmd5.json文件已生成在：{outputPath}\n");
+                {
-                Process_Box.AppendText($"JSON内容MD5校验值：{jsonMD5}");
+                    progressBar1.Value = 100;
-                Process_Box.ScrollToCaret();
+                    Process_Box.AppendText($"\nmd5.json文件已生成在：{outputPath}\n");
+                    Process_Box.AppendText($"JSON内容MD5校验值：{jsonMD5}");
+                    Process_Box.ScrollToCaret();
+                }));
             }
             catch (Exception ex)
             {
-                MessageBox.Show($"生成JSON文件时出错：{ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                this.Invoke((MethodInvoker)(() =>
+                {
+                    MessageBox.Show($"生成JSON文件时出错：{ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                }));
             }
         }