递归获取某一目录下所有子目录及子文件

传入参数为当前选择目录
private List<DirectoryInfo> GetDirectoryInfos(DirectoryInfo info) {
            var infos =  info.GetDirectories();
            List<DirectoryInfo> infos1 = new List<DirectoryInfo>();
            if (infos.Length == 0)
            {
                return null;
            }
            else {
                foreach(DirectoryInfo info1 in infos){
                    infos1.Add(info1);
                   var infos2 =  GetDirectoryInfos(info1);
                    if (infos2 != null) {
                        foreach (DirectoryInfo info2 in infos2) {
                            infos1.Add(info2);
                        }
                    }
                }
            }
            return infos1;
        }

可以遍历List<DirectoryInfo>中的每一个DirectoryInfo，通过GetFiles方法获得所有子文件路径。

List<DirectoryInfo> infos = GetDirectoryInfos(infopath);
List<string> files = new List<string>();
foreach (DirectoryInfo info in infos)
{
     directory = info;
      foreach (FileInfo file in info.GetFiles())
      {
           files.add(file.FullName);
      }
}