try { XmlSerializerNamespaces ns = new XmlSerializerNamespaces(); ns.Add("my", "http://flibble"); Workers workers = new Workers(); workers.MyWorkers = new Worker[] { new Worker() { Name = "1", Number = 1 }, new Worker() { Name = "2", Number = 2 } }; XmlSerializer mySerializer = new XmlSerializer(typeof(Workers)); StreamWriter myWriter = new StreamWriter("myFileName.xml"); mySerializer.Serialize(myWriter, workers, ns); myWriter.Close(); workers = null; FileStream myFileStream1 = new FileStream("myFileName.xml", FileMode.Open); workers = (Workers)mySerializer.Deserialize(myFileStream1); int iii = 0; } catch (System.Exception ex) { int iiii = 0; } } [XmlRoot("Workers")] public class Workers { #region private data. private Worker[] m_workers = null; #endregion [XmlElement(Namespace = "http://flibble", ElementName = "Worker")] public Worker[] MyWorkers { get { return m_workers; } set { m_workers = value; } } } public class Worker { #region private data. private int m_number = 0; private string m_name = null; #endregion [XmlElement(Namespace = "http://flibble", DataType = "int")] public int Number { get; set; //get { return m_number; } //set { m_number = value; } } [XmlAttribute("Name", Namespace = "")] public string Name { get { return m_name; } set { m_name = value; } } } -----------------------------------------------------------------------------------------
原文 http://www.cnblogs.com/yukaizhao/archive/2011/07/22/xml-serialization.html
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class
Program
{
static
void
Main(
string
[] args)
{
int
i = 10;
//声明Xml序列化对象实例serializer
XmlSerializer serializer =
new
XmlSerializer(
typeof
(
int
));
//执行序列化并将序列化结果输出到控制台
serializer.Serialize(Console.Out, i);
Console.Read();
}
}
|
上面代码对int i进行了序列化,并将序列化的结果输出到了控制台,输出结果如下
<?xml version="1.0" encoding="gb2312"?> <int>10</int>
可以将上述序列化的xml进行反序列化,如下代码
static void Main(string[] args) { using (StringReader rdr = new StringReader(@"<?xml version=""1.0"" encoding=""gb2312""?> <int>10</int>")) { //声明序列化对象实例serializer XmlSerializer serializer = new XmlSerializer(typeof(int)); //反序列化,并将反序列化结果值赋给变量i int i = (int)serializer.Deserialize(rdr); //输出反序列化结果 Console.WriteLine("i = " + i); Console.Read(); } }
以上代码用最简单的方式说明了xml序列化和反序列化的过程,.Net系统类库为我们做了大量的工作,序列化和反序列化都非常简单。但是在现实中业务需求往往比较复杂,不可能只简单的序列化一个int变量,显示中我们需要对复杂类型进行可控制的序列化。
自定义对象的Xml序列化:
System.Xml.Serialization命名空间中有一系列的特性类,用来控制复杂类型序列化的控制。例如 XmlElementAttribute、XmlAttributeAttribute、XmlArrayAttribute、 XmlArrayItemAttribute、XmlRootAttribute等等。
看一个小例子,有一个自定义类Cat,Cat类有三个属性分别为Color,Saying,Speed。
namespace UseXmlSerialization { class Program { static void Main(string[] args) { //声明一个猫咪对象 var c = new Cat { Color = "White", Speed = 10, Saying = "White or black, so long as the cat can catch mice, it is a good cat" }; //序列化这个对象 XmlSerializer serializer = new XmlSerializer(typeof(Cat)); //将对象序列化输出到控制台 serializer.Serialize(Console.Out, c); Console.Read(); } } [XmlRoot("cat")] public class Cat { //定义Color属性的序列化为cat节点的属性 [XmlAttribute("color")] public string Color { get; set; } //要求不序列化Speed属性 [XmlIgnore] public int Speed { get; set; } //设置Saying属性序列化为Xml子元素 [XmlElement("saying")] public string Saying { get; set; } } }
可以使用XmlElement指定属性序列化为子节点(默认情况会序列化为子节点);或者使用XmlAttribute特性制定属性序列化为Xml节点的属性;还可以通过XmlIgnore特性修饰要求序列化程序不序列化修饰属性。
对象数组的Xml序列化:
数组的Xml序列化需要使用XmlArrayAttribute和XmlArrayItemAttribute;XmlArrayAttribute指定数组元素的Xml节点名,XmlArrayItemAttribute指定数组元素的Xml节点名。
如下代码示例:
/*玉开技术博客 http://www.cnblogs.com/yukaizhao */ using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Xml.Serialization; namespace UseXmlSerialization { class Program { static void Main(string[] args) { //声明一个猫咪对象 var cWhite = new Cat { Color = "White", Speed = 10, Saying = "White or black, so long as the cat can catch mice, it is a good cat" }; var cBlack = new Cat { Color = "Black", Speed = 10, Saying = "White or black, so long as the cat can catch mice, it is a good cat" }; CatCollection cc = new CatCollection { Cats = new Cat[] { cWhite,cBlack} }; //序列化这个对象 XmlSerializer serializer = new XmlSerializer(typeof(CatCollection)); //将对象序列化输出到控制台 serializer.Serialize(Console.Out, cc); Console.Read(); } } [XmlRoot("cats")] public class CatCollection { [XmlArray("items"),XmlArrayItem("item")] public Cat[] Cats { get; set; } } [XmlRoot("cat")] public class Cat { //定义Color属性的序列化为cat节点的属性 [XmlAttribute("color")] public string Color { get; set; } //要求不序列化Speed属性 [XmlIgnore] public int Speed { get; set; } //设置Saying属性序列化为Xml子元素 [XmlElement("saying")] public string Saying { get; set; } } }
以上代码将输出:
<?xml version="1.0" encoding="gb2312"?> <cats xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://ww w.w3.org/2001/XMLSchema"> <items> <item color="White"> <saying>White or black, so long as the cat can catch mice, it is a good cat</saying> </item> <item color="Black"> <saying>White or black, so long as the cat can catch mice, it is a good cat</saying> </item> </items> </cats>
XmlSerializer内存泄漏问题:
多谢chenlulouis,仔细看了下msdn,确实存在泄漏的情况,msdn说明如下:
动态生成的程序集
为了提高性能,XML 序列化基础结构将动态生成程序集,以序列化和反序列化指定类型。此基础结构将查找并重复使用这些程序集。此行为仅在使用以下构造函数时发生:
XmlSerializer(Type)
XmlSerializer.XmlSerializer(Type, String)
如果使用任何其他构造函数,则会生成同一程序集的多个版本,且绝不会被卸载,这将导致内存泄漏和性能降低。最简单的解决方案是使用先前提到的两个构造函数的其中一个。否则,必须在 Hashtable 中缓存程序集,如以下示例中所示。
也就是说我们在使用XmlSerializer序列化,初始化XmlSerializer对象时最好使用下面两个构造函数否则会引起内存泄漏。
XmlSerializer(Type)
XmlSerializer.XmlSerializer(Type, String)
C#处理Xml的相关随笔: