.net C# FileUpload控件上傳

代碼

/// <summary>
        ///  保存
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnPro_Click(object sender, EventArgs e)
        {
            if (Session["User"] != null)
            {
			  try
                {
					string Imgfile = string.Empty;
					if (FileUpload_ProductImg.HasFile)
					{
						string path = Server.MapPath("~/mImages/ProductUploadFile/");
						Imgfile = "mImages/ProductUploadFile/";
						//拼接文件的名稱
						//DirectoryInfo dir = new DirectoryInfo(path);
						//文件名由文件夾中文件的數量和後綴組成
						//string name = dir.GetFiles().Length + Path.GetExtension(FileUpload_ProductImg.FileName);
						string name = DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + Path.GetExtension(FileUpload_ProductImg.FileName);
						Imgfile = Imgfile + name;
						FileUpload_ProductImg.PostedFile.SaveAs(path + name);
					}else
					{
					 Page.ClientScript.RegisterStartupScript(this.GetType(), "", @"<script>alert('沒有選擇文件，請先選擇文件！');location.href='NewsContentList.aspx';</script>");
                    return;
					}
                }
                catch (Exception)
                {
                    Page.ClientScript.RegisterStartupScript(this.GetType(), "", @"<script>alert('上傳失敗，請聯繫管理員！');location.href='NewsContentList.aspx';</script>");
                    return;
                }
            }
            else
            {
                Page.ClientScript.RegisterStartupScript(this.GetType(), "", @"<script>alert('登入超時！');location.href='Login.aspx';</script>");
                return;
            }
        }