手边刚好有个,这个是把路径格式化成时间了然后路径存放数据库里
 protected void Button1_Click(object sender, EventArgs e)
    {
        string rootUrl = Server.MapPath("~/img/") + DateTime.Now.Year.ToString()+DateTime.Now.Month.ToString()+DateTime.Now.Day.ToString()+DateTime.Now.Hour.ToString()+DateTime.Now.Minute.ToString()+DateTime.Now.Second.ToString()+ ".jpg";
        string imgUrl = "~/img/" + DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString()+DateTime.Now.Second.ToString() + ".jpg";
        cimg.PostedFile.SaveAs(rootUrl);
        ShopModel_commodity commodity = new ShopModel_commodity();
        commodity.Commodity_name = cname.Text;
        commodity.Commodity_price = cprice.Text;
        commodity.Commodity_text = ctext.Text;
        commodity.Commodity_picurl = imgUrl; //图片路径
        commodity.Commodity_type = DropDownList1.SelectedValue;
        commodity.Commodity_adduser = cadder.Text;
        commodity.Commodity_addtime = DateTime.Now;
        if (ShopDal.AddNewCommodity(commodity))
        {
            Response.Write("<script>alert(\"添加商品成功\");window.location='admin.aspx'</script>");
        }
        else
        {
            Response.Write("<script>alert(\"添加商品失败\")</script>");
        }
    }