如何更改上传文件文件名

Question

如何更改上传文件文件名？？？
比如说我上传文件为：aaa.doc
我想改成以当前时间命名的：200807221307.doc而且还要改好后保存到数据库中去
以便下次可以直接调用

Answer 1

string FileName = Server.MapPath("./" + DateTime.Now.ToString("yyyyMMddHHmmss.doc"));
FileUpload1.SaveAs(FileName);

Answer 2

public static string fileUpload(System.Web.UI.WebControls.FileUpload theFileUpload, string path, System.Web.UI.Page thePage, bool isShow)
        {
            string[] returnStr = new string[3];
            if (theFileUpload.HasFile)
            {
                string fileContentType = theFileUpload.PostedFile.ContentType;
                if (fileContentType == "image/bmp" || fileContentType == "image/gif" || fileContentType == "image/pjpeg")
                {
                    string name = theFileUpload.PostedFile.FileName;                                                   //客户端文件路径                     FileInfo file = new FileInfo(name);
                    string fileName = DateTime.Now.ToString("yyyyMMddHHmmss") + System.IO.Path.GetExtension(file.Name);//文件名称 
                    string largerPath = thePage.Server.MapPath(path + "larger/" + fileName);                           //服务器端文件路径 
                    if (!File.Exists(largerPath))
                    {
                        theFileUpload.SaveAs(largerPath);                                                            //使用SaveAs方法保存文件
                        return fileName;
                    }
                }
            }
            return "";
        }

Answer 3

string fileName= FileUpload1.FileName;   //得到上传文件的名字
//得到文件的扩展名
string fileType = fileName.Substring(fileName.LastIndexOf(".") + 1);
--你可以把他名字改掉(比如加上时间);
fileName=fileName+DateTime.Now.ToString();
//保存文件路径
string iPath = Server.MapPath("要保存的虚拟目录") + "\\" + fileName;
//保存文件
FileUpload1.SaveAs(iPath);

Answer 4

谢谢两位了，受你们的启示，我已经搞定了
其实不用那么复杂，我把我刚做的贴出来看看： void UpPic()
        {
            string filename = FileUpload1.FileName;
            int posdot = filename.LastIndexOf(".");
            string extname = filename.Substring(posdot + 1);
            string[] good = new string[] { "jpg", "gif", "bmp", "jepg","doc","txt" };
            int i = 0;
            foreach (string a in good)
            {
                if (a == extname.ToLower())
                {
                    i++;
                }
            }            if (i > 0)
            {
                string aa = filename.Substring(0, posdot);
                filename=filename.Replace(aa,DateTime.Now.ToString("yyyyMMddHHmmss"));
                string paths = Server.MapPath("\\") + "File\\";
                strphoto = paths + filename;
                FileUpload1.SaveAs(strphoto);
            }
        }