图片image和byte处理,fileupload上传图片

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这是通过浏览某图片，把他存放到数据库中

string filename = txt_filename.Text;
        string filecomment = txt_filecomment.Text;
        string SlaveFileName = FileUpload1.PostedFile.FileName;
        byte[] FileContent_img = null;
        DateTime UploadTime = DateTime.Now.Date;

        string id = lbl_id.Text;
        RemoteRule remoteRule = (RemoteRule)GetRemoteingObjectByType(typeof(RemoteRule), "remoterule");
        DataSet ds = new DataSet();
        if (id == "")
 

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显示图片的

byte[] Image_img = (byte[])ds_image.Tables[0].Rows[0]["Image_im"];
                            if (Image_img.Length == 0)
                                return;
                            int filelength = Image_img.Length;
                            string imageName = ds_image.Tables[0].Rows[0][1].ToString() + "1" + ".jpg";
                            string myUrl = HttpContext.Current.Server.MapPath(this.Request.ApplicationPath) + @"\TempDownLoad\" + imageName;
                            FileStream fs = new FileStream(myUrl, FileMode.OpenOrCreate);
                            BinaryWriter w = new BinaryWriter(fs);
                            w.BaseStream.Write(Image_img, 0, filelength);
                            w.Flush();
                            w.Close();

                            Image1.ImageUrl = Context.Request.ApplicationPath + "/TempDownLoad/" + imageName;
                            Bitmap bitmap = new Bitmap(myUrl);
                            Image1.Width = bitmap.Width;
                            Image1.Height = bitmap.Height;