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

View Code

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>");
}