**** Merged from MCS ****

[mono-project.git] / mcs / class / System.XML / System.Xml.Serialization / standalone_tests / potest.cs

using System;
using System.Xml;
using System.Xml.Serialization;
using System.IO;

// The XmlRootAttribute allows you to set an alterate name
// (PurchaseOrder) for the XML element and its namespace. By
// default, the XmlSerializer uses the class name. The attribute
// also allows you to set the XML namespace for the element. Lastly,
// the attribute sets the IsNullable property, which specifies whether
// the xsi:null attribute appears if the class instance is set to
// a null reference.
[XmlRootAttribute("PurchaseOrder", Namespace="http://cpandl.com",
                  IsNullable=false)]
public class PurchaseOrder
{
        public Address ShipTo;
        public string OrderDate;
        // The XmlArrayAttribute changes the XML element name
        // from the default of "OrderedItems" to "Items".
        [XmlArrayAttribute("Items")]
        public OrderedItem[] OrderedItems;
        public decimal SubTotal;
        public decimal ShipCost;
        public decimal TotalCost;
}

public class Address
{
        // The XmlAttribute instructs the XmlSerializer to serialize the Name
        // field as an XML attribute instead of an XML element (the default
        // behaviour).
        [XmlAttribute]
        public string Name;
        public string Line1;

        // Setting the IsNullable property to false instructs the
        // XmlSerializer that the XML attribute will not appear if
        // the City field is set to a null reference.
        [XmlElementAttribute(IsNullable=false)]
        public string City;
        public string State;
        public string Zip;
}

public class OrderedItem
{
        public string ItemName;
        public string Description;
        public decimal UnitPrice;
        public int Quantity;
        public decimal LineTotal;

        // Calculate is a custom method that calculates the price per item
        // and stores the value in a field.
        public void Calculate()
        {
                LineTotal=UnitPrice*Quantity;
        }
}

public class Test
{
        public static void Main()
        {
                // Read and write purchase orders.
                Test t=new Test();
                t.CreatePO("potest.xml");
                t.ReadPO("potest.xml");
        }

        private void CreatePO(string filename)
        {
                // Creates an instance of the XmlSerializer class;
                // specifies the type of object to serialize.
                XmlSerializer serializer=new XmlSerializer(typeof(PurchaseOrder));
                TextWriter writer=new StreamWriter(filename);
                PurchaseOrder po=new PurchaseOrder();

                // Creates an address to ship and bill to.
                Address billAddress=new Address();
                billAddress.Name="Teresa Atkinson";
                billAddress.Line1="1 Main St.";
                billAddress.City="AnyTown";
                billAddress.State="WA";
                billAddress.Zip="00000";
                // Sets ShipTo and BillTo to the same addressee.
                po.ShipTo=billAddress;
                po.OrderDate=System.DateTime.Now.ToLongDateString();

                // Creates an OrderedItem.
                OrderedItem i1=new OrderedItem();
                i1.ItemName="Widget S";
                i1.Description="Small widget";
                i1.UnitPrice=(decimal)5.23;
                i1.Quantity=3;
                i1.Calculate();

                // Inserts the item into the array.
                OrderedItem[] items={i1};
                po.OrderedItems=items;
                // Calculate the total cost.
                decimal subTotal=new decimal();
                foreach(OrderedItem oi in items)
                {
                        subTotal+=oi.LineTotal;
                }
                po.SubTotal=subTotal;
                po.ShipCost=(decimal)12.51;
                po.TotalCost=po.SubTotal+po.ShipCost;
                // Serializes the purchase order, and closes the TextWriter.
                serializer.Serialize(writer, po);
                writer.Close();
        }

        protected void ReadPO(string filename)
        {
                // Creates an instance of the XmlSerializer class;
                // specifies the type of object to be deserialized.
                XmlSerializer serializer=new XmlSerializer(typeof(PurchaseOrder));
                // If the XML document has been altered with unknown
                // nodes or attributes, handles them with the
                // UnknownNode and UnknownAttribute events.
                serializer.UnknownNode+=new XmlNodeEventHandler(serializer_UnknownNode);
                serializer.UnknownAttribute+=new XmlAttributeEventHandler(serializer_UnknownAttribute);

                // A FileStream is needed to read the XML document.
                FileStream fs=new FileStream(filename, FileMode.Open);
                // Declares an object variable of the type to be deserialized.
                PurchaseOrder po;
                // Uses the Deserialize method to restore the object's state with
                // data from the XML document. */
                po=(PurchaseOrder)serializer.Deserialize(fs);
                fs.Close();
                
                // Reads the order date.
                Console.WriteLine("OrderDate: "+po.OrderDate);

                // Reads the shipping address.
                Address shipTo=po.ShipTo;
                ReadAddress(shipTo, "Ship To:");
                // Reads the list of ordered items.
                OrderedItem[] items=po.OrderedItems;
                Console.WriteLine("Items to be shipped:");
                foreach(OrderedItem oi in items)
                {
                        Console.WriteLine("\t"+
                                          oi.ItemName+"\t"+
                                          oi.Description+"\t"+
                                          oi.UnitPrice+"\t"+
                                          oi.Quantity+"\t"+
                                          oi.LineTotal);
                }
                // Reads the subtotal, shipping cost, and total cost.
                Console.WriteLine("\n\t\t\t\t\t Subtotal\t"+po.SubTotal+
                                  "\n\t\t\t\t\t Shipping\t"+po.ShipCost+
                                  "\n\t\t\t\t\t Total\t\t"+po.TotalCost);
        }

        protected void ReadAddress(Address a, string label)
        {
                // Reads the fields of the Address.
                Console.WriteLine(label);
                Console.Write("\t"+
                              a.Name+"\n\t"+
                              a.Line1+"\n\t"+
                              a.City+"\t"+
                              a.State+"\n\t"+
                              a.Zip+"\n");
        }

        protected void serializer_UnknownNode(object sender,
                                              XmlNodeEventArgs e)
        {
                Console.WriteLine("Unknown Node:"+e.Name+"\t"+e.Text);
        }

        protected void serializer_UnknownAttribute(object sender,
                                                   XmlAttributeEventArgs e)
        {
                System.Xml.XmlAttribute attr=e.Attr;
                Console.WriteLine("Unknown attribute "+attr.Name+"='"+attr.Value+"'");
        }
}