将移动临时文件修改为复制临时文件

Form1.cs

@@ -929,13 +929,12 @@ namespace CheckDownload
                         Directory.CreateDirectory(localDir);
                     }
 
-                    if (!await TryMoveFileAsync(tempFilePath, localPath))
-                    {
-                        string backupPath = localPath + ".new";
-                        File.Move(tempFilePath, backupPath);
-                        filesForScripting.Add((localPath, backupPath));
+                    if (!await TryCopyFileAsync(tempFilePath, localPath)) // 改为使用复制方法
+                    {
+                        string backupPath = localPath + ".new";
+                        File.Copy(tempFilePath, backupPath, true); // 复制而非移动
+                        filesForScripting.Add((localPath, backupPath));
                     }
-
                 }
                 finally
                 {
@@ -1038,7 +1037,7 @@ namespace CheckDownload
                 foreach (var file in files)
                 {
                     batchContent.AppendLine($"del \"{file.original}\" /f /q");
-                    batchContent.AppendLine($"move \"{file.newFile}\" \"{file.original}\"");
+                    batchContent.AppendLine($"copy /Y \"{file.newFile}\" \"{file.original}\"");
                 }
 
                 batchContent.AppendLine("del \"%~f0\" /f /q");
@@ -1721,6 +1720,41 @@ namespace CheckDownload
 
             string errorMessage = innermostException?.Message ?? ex?.Message ?? "发生未知错误。";
             MessageBox.Show(errorMessage, "更新错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
+        }
+
+        /// <summary>
+        /// 尝试将文件从源位置复制到目标位置
+        /// </summary>
+        private async Task<bool> TryCopyFileAsync(string sourcePath, string targetPath)
+        {
+            try
+            {
+                // 确保目标目录存在
+                string targetDir = Path.GetDirectoryName(targetPath);
+                if (!Directory.Exists(targetDir))
+                {
+                    Directory.CreateDirectory(targetDir);
+                }
+
+                // 执行复制操作
+                File.Copy(sourcePath, targetPath, true);
+                return true;
+            }
+            catch (Exception ex)
+            {
+                // 文件可能被占用，稍后重试
+                try
+                {
+                    await Task.Delay(1000);
+                    File.Copy(sourcePath, targetPath, true);
+                    return true;
+                }
+                catch
+                {
+                    UpdateStatus($"文件复制失败: {Path.GetFileName(targetPath)}");
+                    return false;
+                }
+            }
         }
     }
 }