Asp.net WebFrom 上传图片

  if (FileUpload1.HasFile)
            {
     
                //获取上传的文件名称
                string fileName = FileUpload1.FileName;
                //获取上传文件的后缀名
                string filefix = fileName.Substring(fileName.LastIndexOf('.') + 1).ToLower();
                //开始判断
                if (filefix == "png" || filefix == "jpg" || filefix == "jpeg" || filefix == "pic")
                {
     
                    try
                    {
     
                        //把图片的名称保存到文本框，方便保存到数据库
                        TextB_hideImg.Text = fileName;
                        //上传
                        FileUpload1.SaveAs(Server.MapPath("~/CommodityImgs/") + fileName);
                        //在img上展示
                        this.Image1.ImageUrl = "~/CommodityImgs/" + fileName;
                        //提示图片上传成功
                        this.Label1.Text = "图片上传成功";
                    }
                    catch (Exception)
                    {
     
                        Response.Write("");
                    }       
                }
                else
                {
     
                    //文件类型不正确
                    Response.Write("");
                }
            }