XML串行化的示例代码分享

private void SerializeDataSet(string filename){ XmlSerializer ser = new XmlSerializer(typeof(DataSet)); // Creates a DataSet; adds a table, column, and ten rows. DataSet ds = new DataSet("myDataSet"); DataTable t = new DataTable("table1"); DataColumn c = new DataColumn("thing"); t.Columns.Add(c); ds.Tables.Add(t); DataRow r; for(int i = 0; i<10;i++){ r = t.NewRow(); r[0] = "Thing " + i; t.Rows.Add(r); } TextWriter writer = new StreamWriter(filename); ser.Serialize(writer, ds); writer.Close(); }

private void SerializeElement(string filename){ XmlSerializer ser = new XmlSerializer(typeof(XmlElement)); XmlElement myElement= new XmlDocument().CreateElement("MyElement", "ns"); myElement.InnerText = "Hello World"; TextWriter writer = new StreamWriter(filename); ser.Serialize(writer, myElement); writer.Close(); } private void SerializeNode(string filename){ XmlSerializer ser = new XmlSerializer(typeof(XmlNode)); XmlNode myNode= new XmlDocument(). CreateNode(XmlNodeType.Element, "MyNode", "ns"); myNode.InnerText = "Hello Node"; TextWriter writer = new StreamWriter(filename); ser.Serialize(writer, myNode); writer.Close(); }

public class PurchaseOrder { public Address MyAddress; } public class Address { public string FirstName; }

 
 George 
 

public class PurchaseOrder { public Item [] ItemsOrders } public class Item { public string ItemID public decimal ItemPrice }

   aaa111 34.22   bbb222 2.89   

using System; using System.IO; using System.Collections; using System.Xml.Serialization; public class Test{ static void Main(){ Test t = new Test(); t.SerializeCollection("coll.xml"); } private void SerializeCollection(string filename){ Employees Emps = new Employees(); // Note that only the collection is serialized--not the // CollectionName or any other public property of the class. Emps.CollectionName = "Employees"; Employee John100 = new Employee("John", "100xxx"); Emps.Add(John100); XmlSerializer x = new XmlSerializer(typeof(Employees)); TextWriter writer = new StreamWriter(filename); x.Serialize(writer, Emps); } } public class Employees:ICollection{ public string CollectionName; private ArrayList empArray = new ArrayList(); //所要求要求的Item性质(property)(C#的索引器(indexer)) public Employee this[int index]{ get{return (Employee) empArray[index];} } public void CopyTo(Array a, int index){ empArray.CopyTo(a, index); } public int Count{ get{return empArray.Count;} } public object SyncRoot{ get{return this;} } public bool IsSynchronized{ get{return false;} } public IEnumerator GetEnumerator(){ return empArray.GetEnumerator(); } //所要求的Add方法,它只能有一个参数,并且此参数的类型必须为Item性质(property)(C#的索引器(indexer))所返回的类型 public void Add(Employee newEmployee){ empArray.Add(newEmployee); } } public class Employee{ public string EmpName; public string EmpID; public Employee(){} public Employee(string empName, string empID){ EmpName = empName; EmpID = empID; } }

using System; using System.Collections; using System.Xml.Serialization; /// 
 /// Summary description for Cars. /// 
 [XmlRoot("carsCollection")] public class CarsArray { private Car[] _CarsList = null; public CarsArray() {} public CarsArray(int size) { _CarsList = new Car[size]; } [XmlArray("carsArray")] [XmlArrayItem("car")] public Car[] CarsCollection { get { return _CarsList; } set { _CarsList = value; } } public Car this[int index] { get { if (index <= _CarsList.GetUpperBound(0) || index > -1) return (Car)_CarsList[index]; else throw new IndexOutOfRangeException("Invalid index value passed."); } set { if (index <= _CarsList.GetUpperBound(0) || index > -1) _CarsList[index] = value; else throw new IndexOutOfRangeException("Invalid index value passed."); } } }

    1234 Black   4321 Blue   

    1234 Black   4321 Blue   

using System; using System.Xml; using System.Xml.Serialization; using System.IO; // The XmlRootAttribute allows you to set an alternate 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://www.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 // behavior). [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("po.xml"); t.ReadPO("po.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. //在并行的xml当中可能存在意外的xml节点,如果不处理这些意外的xml 的节 //点,XmlSerializer将忽略这些意外的节点，如果要处理这些意外节点，可以使用 //XmlSerializer的一下事件进行处理:UnknownNode,UnknownElement , //UnknownAttribute ,UnreferencedObject 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); // 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 + "'"); } }

   1 Main St. AnyTown WA 00000  Wednesday, June 27, 2001   Widget S Small widget 5.23 3 15.69   15.69 12.51 28.2