先來看xml

<?xml version='1.0'?> <root xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xsd='http://www.w3.org/2001/XMLSchema'><Person><Name>小莫</Name><Age>20</Age><Books><Book><Title>馬列主義</Title><ISBN>SOD1323DS</ISBN></Book><Book><Title>高等數學</Title><ISBN>SOD1S8374</ISBN></Book></Books></Person><Person><Name>小紅</Name><Age>20</Age><Books><Book><Title>思想</Title><ISBN>SID1323D845</ISBN></Book></Books></Person> </root>

?

這個xml包含多個Person對象，每個Person對象又包含一個Books對象和多個book對象，反序列化XML時關鍵是看怎么理解xml的結構，理解正確了就很好構造對應的類，理解錯了可能就陷入坑里。

首先root是整個文件的根節點，它是由多個Person組成的。

[System.SerializableAttribute()][System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)][System.Xml.Serialization.XmlRootAttribute("root", IsNullable = false)]public class BaseInfo{[System.Xml.Serialization.XmlElementAttribute("Person")]public List<Person> PersonList { get; set; }}

再看Person對象，Person是由name和age兩個屬性和一個Books對象組成，Person可以定義成

[System.SerializableAttribute()][System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)][System.Xml.Serialization.XmlRootAttribute("Person", IsNullable = false)]public class Person{public string Name { get; set; }public int Age { get; set; }[System.Xml.Serialization.XmlElementAttribute("Books")]public Books Books { get; set; }}

這里理解的關鍵是把下面這小段xml理解成一個包含多個Book的對象，而不是把它理解成book的數組

<Books><Book><Title>毛澤思想</Title><ISBN>SID1323DSD</ISBN></Book></Books>

如果把她理解成一個數據就容易把Person定義成

[System.SerializableAttribute()][System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)][System.Xml.Serialization.XmlRootAttribute("Person", IsNullable = false)]public class Person{public string Name { get; set; }public int Age { get; set; }[System.Xml.Serialization.XmlElementAttribute("Books")]public List<Book> Books { get; set; }}

而book的定義如下

　　 [System.SerializableAttribute()][System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)][System.Xml.Serialization.XmlRootAttribute("Book", IsNullable = false)]public class Book{public string Title { get; set; }public string ISBN { get; set; }}

序列化生成的xml不包含Book節點

，生成的xml如下

<?xml version="1.0"?> <root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><Person><Name>小莫</Name><Age>20</Age><Books><Title>馬列主義</Title><ISBN>SOD1323DS</ISBN></Books></Person><Person><Name>小紅</Name><Age>20</Age><Books><Title>毛澤思想</Title><ISBN>SID1323DSD</ISBN></Books></Person> </root>

?

之所以出現上面的情況是因為：

public List<Book> Books { get; set; } 和Book同屬一個節點層次，在List<Book> Books上顯式指定了屬性名稱Books，那么這個節點就是Books,跟Book上定義指定的[System.Xml.Serialization.XmlRootAttribute("Book", IsNullable = false)] 沒有關系，它是用來指示Book是跟節點時的名稱。 或者可以這樣理解xml是由多個節點組成的，而Book類定義不是一個節點，它只是一個定義，要想xml中出現book,就需要再加一個節點，我們把Person節點加到Books對象中

[System.SerializableAttribute()][System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]public class Books{[System.Xml.Serialization.XmlElementAttribute("Book")]public List<Book> BookList { get; set; }}

這樣就多出了一個節點，再結合剛開始的person定義就能序列化出正確的xml了

完整的代碼

[System.SerializableAttribute()][System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)][System.Xml.Serialization.XmlRootAttribute("root", IsNullable = false)]public class BaseInfo{[System.Xml.Serialization.XmlElementAttribute("Person")]public List<Person> PersonList { get; set; }}[System.SerializableAttribute()][System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)][System.Xml.Serialization.XmlRootAttribute("Person", IsNullable = false)]public class Person{public string Name { get; set; }public int Age { get; set; }[System.Xml.Serialization.XmlElementAttribute("Books")]public Books Books { get; set; }}[System.SerializableAttribute()][System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]public class Books{[System.Xml.Serialization.XmlElementAttribute("Book")]public List<Book> BookList { get; set; }}[System.SerializableAttribute()][System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)][System.Xml.Serialization.XmlRootAttribute("Book", IsNullable = false)]public class Book{public string Title { get; set; }public string ISBN { get; set; }}

static void Main(string[] args){BaseInfo baseInfo = new BaseInfo();List<Person> personList = new List<Person>();Person p1 = new Person();p1.Name = "小莫";p1.Age = 20;List<Book> books = new List<Book>();Book book = new Book();book.Title = "馬列主義";book.ISBN = "SOD1323DS";books.Add(book);p1.Books = new Books();p1.Books.BookList = books;Person p2 = new Person();p2.Name = "小紅";p2.Age = 20;List<Book> books2 = new List<Book>();Book book2 = new Book();book2.Title = "毛澤思想";book2.ISBN = "SID1323DSD";books2.Add(book2);p2.Books =new Books();p2.Books.BookList = books2;personList.Add(p1);personList.Add(p2);baseInfo.PersonList = personList;string postXml2 = SerializeHelper.Serialize(typeof(BaseInfo), baseInfo);Console.ReadLine();}}

序列化用到的類

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Xml.Serialization; using System.IO; using System.Xml;namespace ConsoleApplication1 {public class SerializeHelper{public static string Serialize(Type type, object o){string result = string.Empty;try{XmlSerializer xs = new XmlSerializer(type);MemoryStream ms = new MemoryStream();xs.Serialize(ms, o);ms.Seek(0, SeekOrigin.Begin);StreamReader sr = new StreamReader(ms);result = sr.ReadToEnd();ms.Close();}catch (Exception ex){throw new Exception("對象序列化成xml時發生錯誤：" + ex.Message);}return result;}/// <summary>/// 序列化XML時不帶默認的命名空間xmlns/// </summary>/// <param name="type"></param>/// <param name="o"></param>/// <returns></returns>public static string SerializeNoneNamespaces(Type type, object o){string result = string.Empty;try{XmlSerializer xs = new XmlSerializer(type);MemoryStream ms = new MemoryStream();XmlSerializerNamespaces ns = new XmlSerializerNamespaces();ns.Add("", "");//Add an empty namespace and empty valuexs.Serialize(ms, o, ns);ms.Seek(0, SeekOrigin.Begin);StreamReader sr = new StreamReader(ms);result = sr.ReadToEnd();ms.Close();}catch (Exception ex){throw new Exception("對象序列化成xml時發生錯誤：" + ex.Message);}return result;}/// <summary>/// 序列化時不生成XML聲明和XML命名空間/// </summary>/// <param name="type"></param>/// <param name="o"></param>/// <returns></returns>public static string SerializeNoNamespacesNoXmlDeclaration(Type type, object o){string result = string.Empty;try{XmlSerializer xs = new XmlSerializer(type);MemoryStream ms = new MemoryStream();XmlSerializerNamespaces ns = new XmlSerializerNamespaces();XmlWriterSettings settings = new XmlWriterSettings();settings.OmitXmlDeclaration = true;//不編寫XML聲明XmlWriter xmlWriter = XmlWriter.Create(ms, settings);ns.Add("", "");//Add an empty namespace and empty valuexs.Serialize(xmlWriter, o, ns);ms.Seek(0, SeekOrigin.Begin);StreamReader sr = new StreamReader(ms);result = sr.ReadToEnd();ms.Close();}catch (Exception ex){throw new Exception("對象序列化成xml時發生錯誤：" + ex.Message);}return result;}public static object Deserialize(Type type, string xml){object root = new object();try{XmlSerializer xs = new XmlSerializer(type);MemoryStream ms = new MemoryStream();StreamWriter sw = new StreamWriter(ms);sw.Write(xml);sw.Flush();ms.Seek(0, SeekOrigin.Begin);root = xs.Deserialize(ms);ms.Close();}catch (Exception ex){throw new Exception("xml轉換成對象時發生錯誤：" + ex.Message);}return root;}} }

再看一個例子，簡單數組類型的序列化

<?xml version="1.0"?> <root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><barcodes><barcode>AAA</barcode><barcode>BBB</barcode></barcodes> </root>

我們經常搞半天不知道要怎么書寫上面xml對應的類，總是容易出現上面說過的錯誤，關鍵還是看怎么理解barcodes，和上面的例子類似，這里只寫類怎么創建

　　[System.SerializableAttribute()][System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)][System.Xml.Serialization.XmlRootAttribute("root", IsNullable = false)]public class DownLoadPDFRequest{[System.Xml.Serialization.XmlElementAttribute("barcodes")]public barcoders barcodes { get; set; }}[System.SerializableAttribute()][System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]//[System.Xml.Serialization.XmlRootAttribute("barcoders", IsNullable = false)]public class barcoders{private List<string> _barcode;[System.Xml.Serialization.XmlElementAttribute("barcode")]public List<string> BarCode{get { return _barcode; }set { _barcode = value; }}}

static void Main(string[] args){DownLoadPDFRequest request = new DownLoadPDFRequest();List<barcoders> barcodes = new List<barcoders>();List<string> bars=new List<string>();bars.Add("AAA");bars.Add("BBB");request.barcodes = new barcoders();;request.barcodes.BarCode = bars;string postXml = SerializeHelper.Serialize(typeof(DownLoadPDFRequest), request); }

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