次の XSD があるとします。
<?xml version="1.0" encoding="utf-8" ?>
<!-- XML Schema generated by QTAssistant/XSD Module (http://www.paschidev.com) -->
<xsd:schema targetNamespace="http://tempuri.org/XMLSchema.xsd" xmlns="http://tempuri.org/XMLSchema.xsd" elementFormDefault="qualified" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:element name="elementB">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="FirstName" type="xsd:string"/>
<xsd:element name="LastName" type="xsd:string"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:schema>
少なくともそれを行うには2つの方法があります。1 つ目は、継承と、シリアライザー アノテーションの操作方法に依存しています。
xsd.exe はこれを生成します:
//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated by a tool.
// Runtime Version:4.0.30319.18034
//
// Changes to this file may cause incorrect behavior and will be lost if
// the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
using System.Xml.Serialization;
//
// This source code was auto-generated by xsd, Version=4.0.30319.1.
//
/// <remarks/>
[System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "4.0.30319.1")]
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType=true, Namespace="http://tempuri.org/XMLSchema.xsd")]
[System.Xml.Serialization.XmlRootAttribute(Namespace="http://tempuri.org/XMLSchema.xsd", IsNullable=false)]
public partial class elementB {
private string firstNameField;
private string lastNameField;
/// <remarks/>
public string FirstName {
get {
return this.firstNameField;
}
set {
this.firstNameField = value;
}
}
/// <remarks/>
public string LastName {
get {
return this.lastNameField;
}
set {
this.lastNameField = value;
}
}
}
「注入」するxsi:schemaLocation
には、新しいクラスを追加しelementA : elementB
ます。知らせ:
- System.Xml.Serialization.XmlRootAttribute のセットアップ
schemaLocation
プロパティのセットアップ。
テストプログラム:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Serialization;
using System.IO;
using System.Xml;
namespace ConsoleApplication2
{
class Program
{
static void Main(string[] args)
{
elementB b = new elementB();
b.FirstName = "P";
b.LastName = "G";
XmlSerializer ser = new XmlSerializer(typeof(elementB));
StringBuilder sb = new StringBuilder();
using (XmlWriter writer = XmlWriter.Create(sb, new XmlWriterSettings() { Indent = true }))
{
ser.Serialize(writer, b);
}
Console.WriteLine(sb.ToString());
elementA a = new elementA();
a.FirstName = "P";
a.LastName = "G";
a.schemaLocation = "http://tempuri.org/XMLSchema.xsd me";
ser = new XmlSerializer(typeof(elementA));
sb = new StringBuilder();
using (XmlWriter writer = XmlWriter.Create(sb, new XmlWriterSettings() { Indent = true }))
{
ser.Serialize(writer, a);
}
Console.WriteLine(sb.ToString());
}
}
}
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://tempuri.org/XMLSchema.xsd")]
[System.Xml.Serialization.XmlRootAttribute(Namespace = "http://tempuri.org/XMLSchema.xsd", ElementName = "elementB", IsNullable = false)]
public partial class elementA : elementB
{
private string torefField;
/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute(Form = System.Xml.Schema.XmlSchemaForm.Qualified, Namespace = "http://www.w3.org/2001/XMLSchema-instance")]
public string schemaLocation
{
get
{
return this.torefField;
}
set
{
this.torefField = value;
}
}
}
期待される結果を生成します。
<?xml version="1.0" encoding="utf-16"?>
<elementB xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://tempuri.org/XMLSchema.xsd">
<FirstName>P</FirstName>
<LastName>G</LastName>
</elementB>
<?xml version="1.0" encoding="utf-16"?>
<elementB xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:schemaLocation="http://tempuri.org/XMLSchema.xsd me" xmlns="http://tempuri.org/XMLSchema.xsd">
<FirstName>Petru</FirstName>
<LastName>Gardea</LastName>
</elementB>
2 番目の方法は、必要なものを必要な場所に注入するカスタム ライターに依存します (適切なロジックを前提としています)。
カスタム XmlWriter を実装します。
class MyXmlWriter : XmlWriter
{
XmlWriter _writer;
bool _docElement = true;
public string SchemaLocation { get; set; }
public string NoNamespaceSchemaLocation { get; set; }
public MyXmlWriter(XmlWriter writer)
{
_writer = writer;
}
(other methods omitted)
public override void WriteStartElement(string prefix, string localName, string ns)
{
_writer.WriteStartElement(prefix, localName, ns);
if (_docElement)
{
if (!string.IsNullOrEmpty(SchemaLocation))
{
_writer.WriteAttributeString("xsi", "schemaLocation", "http://www.w3.org/2001/XMLSchema-instance", SchemaLocation);
}
if (!string.IsNullOrEmpty(NoNamespaceSchemaLocation))
{
_writer.WriteAttributeString("xsi", "noNamesapceSchemaLocation", "http://www.w3.org/2001/XMLSchema-instance", NoNamespaceSchemaLocation);
}
_docElement = false;
}
}
(other methods omitted)
}
変更されたテスト プログラム:
static void Main(string[] args)
{
elementB b = new elementB();
b.FirstName = "P";
b.LastName = "G";
XmlSerializer ser = new XmlSerializer(typeof(elementB));
StringBuilder sb = new StringBuilder();
using (XmlWriter writer = XmlWriter.Create(sb, new XmlWriterSettings() { Indent = true }))
{
ser.Serialize(writer, b);
}
Console.WriteLine(sb.ToString());
sb = new StringBuilder();
using (XmlWriter writer = XmlWriter.Create(sb, new XmlWriterSettings() { Indent = true }))
{
MyXmlWriter newWriter = new MyXmlWriter(writer) { SchemaLocation = "http://tempuri.org/XMLSchema.xsd me" };
ser.Serialize(newWriter, b);
}
Console.WriteLine(sb.ToString());
}
結果は同じ...
<?xml version="1.0" encoding="utf-16"?>
<elementB xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://tempuri.org/XMLSchema.xsd">
<FirstName>P</FirstName>
<LastName>G</LastName>
</elementB>
<?xml version="1.0" encoding="utf-16"?>
<elementB xsi:schemaLocation="http://tempuri.org/XMLSchema.xsd me" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://tempuri.org/XMLSchema.xsd">
<FirstName>P</FirstName>
<LastName>G</LastName>
</elementB>