``` private void btn_start_Click(object sender, EventArgs e) { //找到目录 DirectoryInfo directoryinfo = new DirectoryInfo(txt_path.Text); int i = 1; //读取当前目录文件信息 foreach (var item in directoryinfo.GetFiles()) { string destPath = Path.Combine(txt_path.Text, i + item.Extension); if (item.Name.Length > 10) { //判断是否重名 if (!File.Exists(destPath)) { item.MoveTo(destPath); } i++; } } MessageBox.Show("操作完成"); //通过长宽新建文件夹 //将该尺寸的文件移动到文件夹下并重命名 } private void txt_path_Click(object sender, EventArgs e) { DialogResult dr = folderBrowserDialog1.ShowDialog(); if (dr == System.Windows.Forms.DialogResult.OK) { txt_path.Text = folderBrowserDialog1.SelectedPath; } } ```