FileUpload怎么自定义上传的文件名

                                                  FileUpload                    修改文件名                                              
[解决办法]
            string loadFile = fileUpload1.PostedFile.FileName;
            string fileExtension = loadFile.Substring(loadFile.LastIndexOf("."));
            string newFileName = Guid.NewGuid().ToString() + fileExtension;
            string file = Server.MapPath("~/Files/" + newFileName);
            fileUpload1.SaveAs(file);
就是这样啦，每次产生的文件名都不同
[解决办法]
string Sion = Path.GetExtension(this.FileUpload1.FileName);
       string ServerPath = Server.MapPath(@"~/uploads");

       string FileName = DateTime.Now.ToString("yyyyMMddHHmmssFFFFF") + this.FileUpload1.FileName ;
        string SaveFilePath = ServerPath + "/" + FileName;
        this.FileUpload1.PostedFile.SaveAs(SaveFilePath);