Source code for a simple .NET report application

using FourJs.Report.Runtime;
using System;
using System.Collections.Generic;
using System.Xml.Serialization;

namespace Sales
{

    //The XmlRoot annotation causes an global element declaration to be produced in the schema.
    [Serializable]
    [XmlRoot]
    public class Sales
    {
        //The XmlElement annotation maps a property to an XML element.

        //The Genero Engine does not support optional variables so setting "IsNullable = true" is mandatory.
        //If a variable needs to be optional then set the variable to null whenthere is no value.
        //If a primitive type needs to be optional then use the c# nullable type 
        //instead (e.g "int?" for "int").

        [XmlElementAttribute(IsNullable = true)]
        public String shopName;
        public int zipCode;
        public DateTime day;


        //This and any other public collection will be serialized in the order they are declared descending //recursively into the classes contained in the collections.
        [XmlElementAttribute(IsNullable = true)]
        public List<SalesItem> items;

        public Sales(String shopName, int zipCode, DateTime day)
        {
            this.items = new List<SalesItem>();
            this.shopName = shopName;
            this.zipCode = zipCode;
            this.day = day;
            int i = 0;
            items.Add(new SalesItem("Tablelamp", SalesItem.Category.Furniture, 23.00, null));
            items.Add(new SalesItem("Tablelamp", SalesItem.Category.Furniture, 267.00, items[i++]));
            items.Add(new SalesItem("Officechair", SalesItem.Category.Furniture, 155.00, items[i++]));
            items.Add(new SalesItem("Grandfather clock", SalesItem.Category.Furniture, 329.00, items[i++]));
            items.Add(new SalesItem("Scissors", SalesItem.Category.Supplies, 19.00, items[i++]));
            items.Add(new SalesItem("Measuring tape", SalesItem.Category.Supplies, 23.00, items[i++]));
            items.Add(new SalesItem("Sunglasses", SalesItem.Category.Travelling, 15.95, items[i++]));
            items.Add(new SalesItem("Penknife", SalesItem.Category.Travelling, 6.25, items[i++]));
            items.Add(new SalesItem("Ornateangel", SalesItem.Category.Art, 1.95, items[i++]));
        }

        /** Default Constructor that is required for deserialization.
            In this program this is never used.
        
         */
        public Sales()
        {

        }

        /**
            Runs the report using the design file specified in args[0] or "SalesList.4rp" otherwise.
            The program creates the file "SalesList.pdf" and opens it using
            System.Diagnostics.Process.Start which will typically
            invoke the Acrobat Reader.
        */
        static void Main(string[] args)
        {

            String designFile;
            String outputFilename = "SalesList.pdf";

            if (args.Length == 0)
            {
                designFile = "..\\SalesList.4rp";
            }
            else
            {
                designFile = args[0];
            }

            FormatHandler handler = new FormatWriter(outputFilename);
            PDFRenderer renderer = new PDFRenderer(handler);
            FourRpLayouter report = new FourRpLayouter(designFile, renderer);

            report.debugLevel = 9;
            Sales data = new Sales("Columbus Arts", 75038, new DateTime());

            report.runFromSerializable(data);

            // open the file
            System.Diagnostics.Process.Start(outputFilename);

        }

    }

    public class SalesItem
    {
        public enum Category { Furniture, Art, Supplies, Travelling };

        [XmlElementAttribute(IsNullable = true)]
        public String articleName;
        public Category category;
        public double price;
        public double runningTotal;

        //The previous item is passed to allow computing the running total.
        public SalesItem(String articleName, Category category, double price, SalesItem previousItem)
        {
            this.articleName = articleName;
            this.category = category;
            this.price = price;

            this.runningTotal = previousItem == null ? price : previousItem.runningTotal + price;
        }

        /** Default Constructor that is required for deserialization.
            In this program this is never used.
        */
        public SalesItem() { }

    }
}