Step 4: Add the buildImage method

Remove the default generated HelloWorld method, and create the buildImage method.

Add the three using instructions to import the barcode library, and the instruction to declare buildImage as a WebMethod. Use the GetBarcodeBuilderType() method to convert a string to a code as expected by the barcode library.

using BarcodeLib;
using BarcodeLib.Barcode;
using BarcodeLib.Barcode.Linear;

namespace BarCodeService
{
    /// <summary>
    /// Summary description for Service1
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [ToolboxItem(false)]
    // To allow this Web Service to be called from script, using ASP.NET
    // [System.Web.Script.Services.ScriptService]
    public class Barcode : System.Web.Services.WebService
    {

         [WebMethod]
         public byte[] buildImage(String type, String code)
         {
             try
             {
                 Linear barcode = new Linear();
                 barcode.Data = code;
                 barcode.Type = GetBarcodeBuilderType(type);
                 barcode.AddCheckSum = true;

                 // save barcode image into your system
                 barcode.ShowText = true;
                 byte[] ret = barcode.drawBarcodeAsBytes();
                 if (ret !- null) return ret;
                 else return null;
             }
             catch (Exception e)
             {
                 return null;
             }
        }
    }
}

BarCodeService.BarCode screenshot showing the code replicated above. — Figure: BarCodeService.BarCode

In the next step we publish the service to your IIS Web server, Step 5: Publish the service.