使用XSD模式验证XML数据

1.使用XSD模式验证XML数据

  验证XML文档的步骤

  （1）定义一个ValidationEventHandle事件处理方法。

  （2）创建XmlReaderSettings对象的实例。

  （3）将ValidationEventHandle与XmlReaderSettings相关联

   (4) 将XmlReaderSettings的ValidationType属性设置为ValidationType.Schema.

   (5)通过XmlReaderSettings类的属性将XSD模式添加至XmlReaderSettings类

  （6）在解析XML数据的时候，XMLReader类使用Read方法验证XML文档。

Xml 

    

<?xml version="1.0" encoding="utf-8" ?>
<authors>
  <author>
    <au_id>123123</au_id>
    <au_lname>White</au_lname>
    <au_fname>Johnson</au_fname>
    <phone>23446345</phone>
    <address>10932 Bigge Rd.</address>
    <city>Menlo Park</city>
    <state>CA</state>
    <zip>049366</zip>
    <contract>true</contract>
  </author>
  <author>
    <au_id>123123</au_id>
    <au_lname>Green</au_lname>
    <au_fname>Johnson</au_fname>
    <phone>23446345</phone>
    <address>10932 Bigge Rd.</address>
    <city>Menlo Park</city>
    <state>CA</state>
    <zip>049366</zip>
    <contract>true</contract>
  </author>
</authors>

XSD

  

<?xml version="1.0" encoding="utf-8"?>
<xs:schema id="Authors"
    targetNamespace="http://tempuri.org/Authors.xsd"
    elementFormDefault="qualified"
    xmlns="http://tempuri.org/Authors.xsd"
    xmlns:mstns="http://tempuri.org/Authors.xsd"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
>
  <xs:element name="authors">
    <xs:complexType>
      <xs:sequence>
        <xs:element maxOccurs="unbounded" name="author">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="au_id" type="xs:string"/>
              <xs:element name="au_lname" type="xs:string"/>
              <xs:element name="au_fname" type="xs:string"/>
              <xs:element name="phone" type="xs:string"/>
              <xs:element name="address" type="xs:string"/>
              <xs:element name="city" type="xs:string"/>
              <xs:element name="state" type="xs:string"/>
              <xs:element name="zip" type="xs:unsignedInt"/>
              <xs:element name="contract" type="xs:string"/>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

C#代码 

   

    private StringBuilder _builder = new StringBuilder();
    protected void Page_Load(object sender, EventArgs e)
    {
        string xmlPath = Request.PhysicalApplicationPath +
            @"\App_Data\Authors.xml";
        string xsdPath = Request.PhysicalApplicationPath +
            @"\App_Data\Authors.xsd";
        XmlReader reader = null;
        XmlReaderSettings setting = new XmlReaderSettings();
        setting.ValidationEventHandler += new System.Xml.Schema.ValidationEventHandler(setting_ValidationEventHandler);
        setting.ValidationType = ValidationType.Schema;
        setting.Schemas.Add(null,XmlReader.Create(xsdPath));
        reader = XmlReader.Create(xmlPath,setting);

        while (reader.Read())
        {

        }
        if (_builder.ToString() == string.Empty)
        {
            Response.Write("Validation completed successfully.");
        }
        else
            Response.Write("Validation Faild.<br>" + _builder.ToString());
    }

    void setting_ValidationEventHandler(object sender, System.Xml.Schema.ValidationEventArgs e)
    {
        _builder.Append("Validation error :"+e.Message+"<br>");
        Response.Write(_builder.ToString());
    }

2. 模式缓存 C#代码不同

   C#代码 

   

    private StringBuilder _builder = new StringBuilder();
    protected void Page_Load(object sender, EventArgs e)
    {
        string xmlPath = Request.PhysicalApplicationPath +
            @"\App_Data\Authors.xml";
        string xsdPath = Request.PhysicalApplicationPath +
            @"\App_Data\Authors.xsd";
        XmlSchemaSet schemaSet = new XmlSchemaSet();
        schemaSet.Add(null,xsdPath);

        XmlReader reader = null;
        XmlReaderSettings settings = new XmlReaderSettings();
        settings.ValidationEventHandler += new ValidationEventHandler(settings_ValidationEventHandler);
        settings.ValidationType = ValidationType.Schema;
        settings.Schemas = schemaSet;
        reader = XmlReader.Create(xmlPath,settings);

        while (reader.Read())
        {
            
        }
        if (_builder.ToString() == string.Empty)
            Response.Write("Validation completed successfully");
        else
            Response.Write("Validation faild.<Br>"+_builder.ToString());
    }

    void settings_ValidationEventHandler(object sender, ValidationEventArgs e)
    {
        _builder.Append("Validation error: "+e.Message+"<br>");
    }