Auto generate Barcode

 string sWorkPath = "";
            sWorkPath = this.Context.Server.MapPath("");

            // Get the Requested code to be created.
            string Code = Request["code"].ToString();

            // Multiply the lenght of the code by 40 (just to have enough width)
            int w = Code.Length * 40;

           // int w = Code.Length * 25;

            // Create a bitmap object of the width that we calculated and height of 100
            Bitmap oBitmap = new Bitmap(w, 100);

            // then create a Graphic object for the bitmap we just created.
            Graphics oGraphics = Graphics.FromImage(oBitmap);

            // Now create a Font object for the Barcode Font
            // (in this case the IDAutomationHC39M) of 18 point size
            //Font oFont = new Font("IDAutomationHC39M_FREE.otf", 18);

            PrivateFontCollection fnts = new PrivateFontCollection();
            fnts.AddFontFile(sWorkPath + @"\IDAutomationHC39M.ttf");
            FontFamily fntfam = new FontFamily("IDAutomationHC39M", fnts);
            Font oFont = new Font(fntfam, 18);
            //Font oFont = new Font(fntfam, 16);

            // Let's create the Point and Brushes for the barcode
            PointF oPoint = new PointF(2f, 2f);
            SolidBrush oBrushWrite = new SolidBrush(Color.Black);
            SolidBrush oBrush = new SolidBrush(Color.White);

            // Now lets create the actual barcode image
            // with a rectangle filled with white color
            oGraphics.FillRectangle(oBrush, 0, 0, w , 100);

            // We have to put prefix and sufix of an asterisk (*),
            // in order to be a valid barcode
            oGraphics.DrawString("*" + Code + "*", oFont, oBrushWrite, oPoint);

            // Then we send the Graphics with the actual barcode
            Response.ContentType = "image/jpeg";
            oBitmap.Save(Response.OutputStream, ImageFormat.Jpeg);