C# 实现文件或目录复制到指定目录

 public void CopyFilesToDirKeepSrcDirName(string srcPath, string destDir)

        {

            if (Directory.Exists(srcPath))

            {

                DirectoryInfo srcDirectory = new DirectoryInfo(srcPath);

                CopyDirectory(srcPath, destDir + @"\" + srcDirectory.Name);

            }

            else

            {

                CopyFile(srcPath, destDir);

            }

        }

        public void CopyFilesToDir(string srcPath, string destDir)

        {

            if(Directory.Exists(srcPath))

            {

                CopyDirectory(srcPath, destDir);

            }

            else

            {

                CopyFile(srcPath, destDir);

            }

        }

        private void CopyDirectory(string srcDir, string destDir)

        {

            DirectoryInfo srcDirectory = new DirectoryInfo(srcDir);

            DirectoryInfo destDirectory = new DirectoryInfo(destDir);



            if (destDirectory.FullName.StartsWith(srcDirectory.FullName, StringComparison.CurrentCultureIgnoreCase))

            {

                throw new Exception("cannot copy parent to child directory.");

            }



            if (!srcDirectory.Exists)

            {

                return;

            }



            if (!destDirectory.Exists)

            {

                destDirectory.Create();

            }



            FileInfo[] files = srcDirectory.GetFiles();



            for (int i = 0; i < files.Length; i++)

            {

                CopyFile(files[i].FullName, destDirectory.FullName);

            }



            DirectoryInfo[] dirs = srcDirectory.GetDirectories();



            for (int j = 0; j < dirs.Length; j++)

            {

                CopyDirectory(dirs[j].FullName, destDirectory.FullName + @"\" + dirs[j].Name);

            }

        }



        private void CopyFile(string srcFile, string destDir)

        {

            DirectoryInfo destDirectory = new DirectoryInfo(destDir);

            string fileName = Path.GetFileName(srcFile);

            if (!File.Exists(srcFile))

            {

                return;

            }



            if (!destDirectory.Exists)

            {

                destDirectory.Create();

            }



            File.Copy(srcFile, destDirectory.FullName + @"\" + fileName, true);



        }