สอบถามโค๊ดการอัพไฟล์ภาพขึ้น Server ของ Hosting ครับผม โดยผมมีโค๊ดเก่าตอนอัพไฟล์แบบ Localhost แต่อยากทราบวิธีการเขียนโค๊ดอัพไฟล์ภาพผ่าน Server ครับ

 protected void BT_Upload_Click(object sender, EventArgs e)
        {
            if (FileUpload1.HasFile)
            {
                check = true;
                ViewState["CheckImage"] = check;
                int initialwidth;
                int initialheight;

                initialwidth = 100;
                initialheight = 0;

                try
                {
                    MemoryStream ms;
                    ms = new MemoryStream(FileUpload1.FileBytes);
                      System.Drawing.Image Objimgage = System.Drawing.Image.FromStream(ms);

                    Bitmap objBitmap;
                    if (Objimgage.Width > initialwidth)
                    {
                        double ratio = Convert.ToDouble(Objimgage.Height) / Objimgage.Width;
                        initialheight = (int)(ratio * (int)initialwidth);
                        objBitmap = new Bitmap(Objimgage, initialwidth, initialheight);

                    }
                    else
                    {
                        objBitmap = new Bitmap(Objimgage);
                    }
                    
                        //ViewState["Pic"] = objBitmap;
                        objBitmap.Save(Server.MapPath("~/ImageUpload/") + "tempimg" + Session["ID"] + "SUP.jpg", objBitmap.RawFormat);
                        SuPic.ImageUrl = "~/ImageUpload/tempimg" + Session["id"] + "SUP.jpg";
                        SuPic.Height = objBitmap.Height;
                    
                }
                catch (Exception ex)
                {
                    string msg = @"<script language='javascript'>alert('ไม่สามารถอัพโหลดได้: \n');</script>";
                    Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "key1", msg, false);
                    return;

                   
                }

                }
            else
                ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "PIC", "alert('No image')", true);
            }

if (this.FormMode == StateMode.Add)
            {
                string MaxID = sup.SelectMaxID().Rows[0]["maxid"].ToString();
                if (MaxID.ToString() == "")
                {
                    ViewState["AUTOGEN"] = "SUP001";
                }
                else
                {
                    string sub = MaxID.Substring(3);
                    int num = Convert.ToInt32(sub);
                    num += 1;
                    string str = Convert.ToString(num);
                    string autogen = "SUP" + str.PadLeft(3, '0');
                    ViewState["AUTOGEN"] = autogen;
                }
                sup._SUPPLEMENTSID = ViewState["AUTOGEN"].ToString();
                sup._SUPPLEMENTSNAME =  SuNametxt.Text;
                sup._BRANDID = DbBrandSu.SelectedValue;
                sup._TYPE_ID = DbType.SelectedValue;
                sup._SUPPLEMENTSDETAIL = SuDetailtxt.Text;
                sup._SUPPLEMENTSCOMPONENTS = SuComponentstxt.Text;
                sup._SUPPLEMENTS_USE = Suusetxt.Text;
                sup.InsertSupplements();

                File.Move(Server.MapPath("~/ImageUpload/") + "tempimg" + Session["id"] + "SUP.jpg", Server.MapPath("~/ImageUpload/") + ViewState["AUTOGEN"].ToString() + "PIC.jpg");
                this.FormMode = StateMode.Search;
                View_Grid();
                SetScreen();
                Server.Transfer("Supplements.aspx");