ASP.NET Tutorial/XML/XmlSerialization — различия между версиями

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Версия 15:30, 26 мая 2010

Reading author instances from an XmlReader using XmlSerialization (C#)

<%@ 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">
    <div>
    
    </div>
    </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}<BR/>",
                        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>


Reading author instances from an XmlReader using XmlSerialization (VB)

<%@ 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">
    <div>
    
    </div>
    </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}<BR/>", _
                        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>
Источник — «http://nfex.ru/index.php?title=ASP.NET_Tutorial/XML/XmlSerialization&oldid=2943»