概念

.net 支持Xml文檔與.net 類之間無縫雙向轉(zhuǎn)換。當(dāng)應(yīng)用程序規(guī)模變大后，要想程序變得靈活，可配置元素也會變得越來越多。應(yīng)用程序根據(jù)xml文檔配置也就自然而然的事。本文的目的也就講解xml文檔與.net 對象通過xml標簽的對應(yīng)關(guān)系，以及xml序列化出現(xiàn)問題后如何解決。

基本的序列化元素

[XmlRoot(“ElementName”)]:對應(yīng)xml文檔的根元素.

Xml Segment1

<?xml version="1.0" encoding="utf-8" ?><StudentCollection></StudentCollection>

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對應(yīng)的映射類：

[XmlRoot("StudentCollection")]public class Student{}

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Xml Segement 2

<?xml version="1.0" encoding="utf-8" ?><customer></customer>

映射類

[XmlRoot("customer")]public class Customer{}

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XmlRoot(“元素名稱”)：類上的XmlRoot標簽指明了類映射到xml的根結(jié)點，標簽中的名稱就是xml文檔中根節(jié)點的名稱。

[XmlElement(“ElementName”)]：映射到xml文檔中元素。

Xml Segment1

<?xml version="1.0" encoding="utf-8" ?><student><age>30</age></student>

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對應(yīng)的映射類：

[XmlRoot("student")]public class Student{[XmlElement("age",Type=typeof (Int32))]public int Age{get;set;}}

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<?xml version="1.0" encoding="utf-8" ?><employee age="30"></employee>

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[XmlAttribute(“AttributeName”)]：映射到xml文檔中屬性。

Xml 文件Employee.xml

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對應(yīng)的映射類：

[XmlRoot("employee")]public class Employee{[XmlAttribute("age")]public string Age{get;set;}}

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Xml 解析：

using (StreamReader sr = new StreamReader("Employee.xml")){XmlSerializer xmlSerializer = new XmlSerializer(typeof(Employee));Employee stList = xmlSerializer.Deserialize(sr) as Employee;Debug.Assert(stList == null);Console.Read();}

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同時具有XmlElement 與 XmlAttribute

<?xml version="1.0" encoding="utf-8" ?><student id="1001"><age>10</age></student> [XmlRoot("student")]public class Student{[XmlAttribute("id")]public string ID{get;set;}[XmlElement("age", Type = typeof(Int32))]public int Age{get;set;}}using (StreamReader sr = new StreamReader("Student.xml")){XmlSerializer xmlSerializer = new XmlSerializer(typeof(Student));Student student = xmlSerializer.Deserialize(sr) as Student;}

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XmlAttayItem 與 XmlElement 以及XmlArray節(jié)點

<?xml version="1.0" encoding="utf-8" ?><studentList><student><id>1001</id><age>23</age><name>hbb0b01</name><subjects><subject name="math"><score>80</score></subject><subject name="english"><score>90</score></subject></subjects></student><student><id>1002</id><age>30</age><name>hbb0b02</name><subjects><subject name="math"><score>70</score></subject><subject name="english"><score>60</score></subject></subjects></student></studentList>

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public class Subject{[XmlAttribute("name")]public string name{get;set;}[XmlElement("score")]public int score{get;set;}}public class Student{public string id{get;set;}public string name{get;set;}public int age{get;set;}/// <summary>/// subjects可以與xml節(jié)點的集合節(jié)點的名稱不同,可以用/// XmlArray指定映射到的集合節(jié)點/// </summary> [XmlArrayItem(ElementName = "subject", Type = typeof(Subject))][XmlArray("subjects")]public Subject[] subjects123{get;set;}}[XmlRoot("studentList")]public class StudentList{[XmlElement(ElementName = "student")]public List<Student> students{get;set;}}using (StreamReader sr = new StreamReader("StudentList.xml")){XmlSerializer xmlSerializer = new XmlSerializer(typeof(StudentList));StudentList stList = xmlSerializer.Deserialize(sr) as StudentList;Debug.Assert(stList == null);Console.Read();}

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總結(jié)：

至此最常用的xml標簽XmlRoot,XmlAttribute,XmlElement,XmlArray,XmlArrayItem與類元素的映射關(guān)鍵已經(jīng)講完。

轉(zhuǎn)載于:https://www.cnblogs.com/hbb0b0/archive/2013/01/30/2883683.html

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