怎么样按日期生成分类文件夹

Question

上传文件时要按年月日进行分类管理，想生成2010/12/25这样进行分类的文件夹，现在我是先判断年文件夹，再判断月文件夹，再判断日文件夹，这样总觉得写得有点啰嗦？有没有好一点的方法呢。

Answer 1

上传文件的时候 给一个上传时间的字段
分类的时候直接用sql语句过滤就好了！

Answer 2

用变量接收 datetime.now()转化成字符串    赋值 给 create的文件夹名称

Answer 3

string strY = DateTime.Now.ToString("yyyy")， string strM = DateTime.Now.ToString("M")，string strY = DateTime.Now.ToString("D");
if (!Directory.Exists(Y))//用来创建文件夹，如果不存在就创建文件夹
                {
                    Directory.CreateDirectory(Y);
                }if (!Directory.Exists(Y+"\\"+M+"\\"+D))//用来创建文件夹，如果不存在就创建文件夹
                {
                    Directory.CreateDirectory(Y+"\\"+M);
                }if (!Directory.Exists(Y+"\\"+M))//用来创建文件夹，如果不存在就创建文件夹
                {
                    Directory.CreateDirectory(Y+"\\"+M+"\\"+D);
                }

Answer 4

 if (System.IO.File.Exists(path))
                            {
                                path = System.Web.HttpContext.Current.Server.MapPath("upload") + @"\" + DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + @"\";
                                System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(path);
                                //判断文件夹否存在,不存在则创建
                                if (!dir.Exists)
                                {
                                    dir.Create();
                                }
                                path = dir + attname;
                                timspath ="client/upload/"+DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() +"/";
                            }

Answer 5

直接判断全路径即可：string path = Server.MapPath("~/" + System.DateTime.Now.ToString("yyyy/MM/dd/"));
if(！Directory.Exists(path))
    Directory.Create(path);

Answer 6

可以直接复制调用//建立 文件保存路径
    private string GetSaveFilePath()
    {
        try
        {
            DateTime dateTime = DateTime.Now;
            string yearStr = dateTime.Year.ToString(); ;
            string monthStr = dateTime.Month.ToString();
            string dayStr = dateTime.Day.ToString();
            string hourStr = dateTime.Hour.ToString();
            string minuteStr = dateTime.Minute.ToString();
            string dir = dateTime.ToString(@"\\yyyyMMdd");
            string path = Server.MapPath("/Upload/");
            if (!Directory.Exists(path + dir))
            {
                Directory.CreateDirectory(path + dir);
            }
            return dir + dateTime.ToString("\\\\yyyyMMddhhmmssffff");
        }
        catch (Exception ex)
        {
            return string.Empty;
        }
    }

Answer 7

 System.IO.Directory.CreateDirectory(Now.ToString("yyyy\\MM\\dd"))