ASP.NET Tutorial/XML/XmlSerialization
Reading author instances from an XmlReader using XmlSerialization (C#)
<source lang="csharp">
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server">
<title>Untitled Page</title>
</head> <body>
<form id="form1" runat="server">
</form>
</body> </html> File: Default.aspx.cs using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.IO; using System.Xml; using System.Xml.Schema; using System.Xml.Serialization;
[XmlRoot(ElementName = "author", Namespace = "http://example.books.ru")] public class Author {
[XmlElement(ElementName = "first-name")] public string FirstName; [XmlElement(ElementName = "last-name")] public string LastName;
}
public partial class _Default : System.Web.UI.Page {
protected void Page_Load(object sender, EventArgs e)
{
XmlSerializerFactory factory = new XmlSerializerFactory();
XmlReaderSettings settings = new XmlReaderSettings();
NameTable nt = new NameTable();
object book = nt.Add("book");
object price = nt.Add("price");
object author = nt.Add("author");
settings.NameTable = nt;
string booksSchemaFile = Path.rubine(Request.PhysicalApplicationPath, "Data.xsd");
settings.Schemas.Add(null, XmlReader.Create(booksSchemaFile));
settings.ValidationType = ValidationType.Schema;
settings.ValidationFlags =
XmlSchemaValidationFlags.ReportValidationWarnings;
settings.ValidationEventHandler +=
new ValidationEventHandler(settings_ValidationEventHandler);
settings.IgnoreWhitespace = true;
settings.IgnoreComments = true;
string booksFile = Path.rubine(Request.PhysicalApplicationPath, "Data.xml");
using (XmlReader reader = XmlReader.Create(booksFile, settings))
{
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element && author.Equals(reader.LocalName))
{
XmlSerializer xs = factory.CreateSerializer(typeof(Author));
Author a = (Author)xs.Deserialize(reader.ReadSubtree());
Response.Write(String.Format("Author: {1}, {0}
",
a.FirstName, a.LastName));
}
}
}
}
void settings_ValidationEventHandler(object sender, System.Xml.Schema.ValidationEventArgs e)
{
Response.Write(e.Message);
}
} File: Data.xml <?xml version="1.0"?> <bookstore xmlns="http://example.books.ru"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <book genre="A" publicationdate="1981" ISBN="1-11111-11-0"> <title>title 1</title> <author> <first-name>A</first-name> <last-name>B</last-name> </author> <price>8</price> </book> <book genre="B" publicationdate="1999" ISBN="0-222-22222-2"> <title>title 2</title> <author> <first-name>C</first-name> <last-name>D</last-name> </author> <price>11.99</price> </book>
</bookstore> File: Data.xsd <?xml version="1.0" encoding="utf-8"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:tns="http://example.books.ru" xmlns="http://example.books.ru" targetNamespace="http://example.books.ru" elementFormDefault="qualified">
<xsd:element name="bookstore" type="bookstoreType" />
<xsd:complexType name="bookstoreType">
<xsd:sequence maxOccurs="unbounded">
<xsd:element name="book" type="bookType" />
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="bookType">
<xsd:sequence>
<xsd:element name="title" type="xsd:string" />
<xsd:element name="author" type="authorName" />
<xsd:element name="price" type="xsd:decimal" />
</xsd:sequence>
<xsd:attribute name="genre" type="xsd:string" />
<xsd:attribute name="publicationdate" type="xsd:string" />
<xsd:attribute name="ISBN" type="xsd:string" />
</xsd:complexType>
<xsd:complexType name="authorName">
<xsd:sequence>
<xsd:element name="first-name" type="xsd:string" />
<xsd:element name="last-name" type="xsd:string" />
</xsd:sequence>
</xsd:complexType>
</xsd:schema></source>
Reading author instances from an XmlReader using XmlSerialization (VB)
<source lang="csharp">
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server">
<title>Untitled Page</title>
</head> <body>
<form id="form1" runat="server">
</form>
</body> </html> File: Default.aspx.vb Imports System.IO Imports System.Xml Imports System.Xml.Schema Imports System.Xml.Serialization Partial Class _Default
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) _
Handles Me.Load
Dim factory As New XmlSerializerFactory
Dim settings As New XmlReaderSettings()
Dim nt As New NameTable()
Dim book As Object = nt.Add("book")
Dim price As Object = nt.Add("price")
Dim author As Object = nt.Add("author")
settings.NameTable = nt
Dim booksSchemaFile As String = Path.rubine(Request.PhysicalApplicationPath, "Data.xsd")
settings.Schemas.Add(Nothing, XmlReader.Create(booksSchemaFile))
settings.ValidationType = ValidationType.Schema
settings.ValidationFlags = XmlSchemaValidationFlags.ReportValidationWarnings
AddHandler settings.ValidationEventHandler, _
AddressOf settings_ValidationEventHandler
settings.IgnoreWhitespace = True
settings.IgnoreComments = True
Dim booksFile As String = _
Path.rubine(Request.PhysicalApplicationPath, "Data.xml")
Using reader As XmlReader = XmlReader.Create(booksFile, settings)
While (reader.Read())
If (reader.NodeType = XmlNodeType.Element And author.Equals(reader.LocalName)) Then
Dim xs As XmlSerializer = factory.CreateSerializer(GetType(Author))
Dim a As Author = CType(xs.Deserialize(reader.ReadSubtree), Author)
Response.Write(String.Format("Author: {1}, {0}
", _
a.FirstName, a.LastName))
End If
End While
End Using
End Sub
Sub settings_ValidationEventHandler(ByVal sender As Object, _
ByVal e As System.Xml.Schema.ValidationEventArgs)
Response.Write(e.Message)
End Sub
End Class <XmlRoot(ElementName:="author", _ Namespace:="http://example.books.ru")> Public Class Author
<XmlElement(ElementName:="first-name")> Public FirstName As String <XmlElement(ElementName:="last-name")> Public LastName As String
End Class File: Data.xml <?xml version="1.0"?> <bookstore xmlns="http://example.books.ru"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <book genre="A" publicationdate="1981" ISBN="1-11111-11-0"> <title>title 1</title> <author> <first-name>A</first-name> <last-name>B</last-name> </author> <price>8</price> </book> <book genre="B" publicationdate="1999" ISBN="0-222-22222-2"> <title>title 2</title> <author> <first-name>C</first-name> <last-name>D</last-name> </author> <price>11.99</price> </book>
</bookstore> File: Data.xsd <?xml version="1.0" encoding="utf-8"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:tns="http://example.books.ru" xmlns="http://example.books.ru" targetNamespace="http://example.books.ru" elementFormDefault="qualified">
<xsd:element name="bookstore" type="bookstoreType" />
<xsd:complexType name="bookstoreType">
<xsd:sequence maxOccurs="unbounded">
<xsd:element name="book" type="bookType" />
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="bookType">
<xsd:sequence>
<xsd:element name="title" type="xsd:string" />
<xsd:element name="author" type="authorName" />
<xsd:element name="price" type="xsd:decimal" />
</xsd:sequence>
<xsd:attribute name="genre" type="xsd:string" />
<xsd:attribute name="publicationdate" type="xsd:string" />
<xsd:attribute name="ISBN" type="xsd:string" />
</xsd:complexType>
<xsd:complexType name="authorName">
<xsd:sequence>
<xsd:element name="first-name" type="xsd:string" />
<xsd:element name="last-name" type="xsd:string" />
</xsd:sequence>
</xsd:complexType>
</xsd:schema></source>
