通过 XmlReader 使用内联 XML 架构进行验证
可以根据内联 XML 架构定义语言 (XSD) 架构验证 XML 文件。 在创建 XmlReader 之前，将 XmlReaderSettings.ValidationFlags 属性更改为启用 ProcessInlineSchema 选项。
.gif "注意") 注意 |
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因为内联架构作为根元素的子元素出现，所以当执行内联架构验证时无法验证根元素。根元素将生成验证警告。 |
示例
以下示例使用内联 XML 架构验证 XML 文件。 因为读取器配置为显示验证警告，所以，您还会看到根元素上预计的警告。
Imports System
Imports System.Xml
Imports System.Xml.Schema
Imports System.IO
public class ValidXSD
public shared sub Main()
' Set the validation settings.
Dim settings as XmlReaderSettings = new XmlReaderSettings()
settings.ValidationType = ValidationType.Schema
settings.ValidationFlags = settings.ValidationFlags Or XmlSchemaValidationFlags.ProcessInlineSchema
settings.ValidationFlags = settings.ValidationFlags Or XmlSchemaValidationFlags.ReportValidationWarnings
AddHandler settings.ValidationEventHandler, AddressOf ValidationCallBack
' Create the XmlReader object.
Dim reader as XmlReader = XmlReader.Create("inlineSchema.xml", settings)
' Parse the file.
while (reader.Read())
end while
end sub
' Display any warnings or errors.
private shared sub ValidationCallBack (sender as object, args as ValidationEventArgs)
if (args.Severity=XmlSeverityType.Warning)
Console.WriteLine(" Warning: Matching schema not found. No validation occurred." + args.Message)
else
Console.WriteLine(" Validation error: " + args.Message)
end if
end sub
end class
using System;
using System.Xml;
using System.Xml.Schema;
using System.IO;
public class ValidXSD {
public static void Main() {
// Set the validation settings.
XmlReaderSettings settings = new XmlReaderSettings();
settings.ValidationType = ValidationType.Schema;
settings.ValidationFlags |= XmlSchemaValidationFlags.ProcessInlineSchema;
settings.ValidationFlags |= XmlSchemaValidationFlags.ReportValidationWarnings;
settings.ValidationEventHandler += new ValidationEventHandler (ValidationCallBack);
// Create the XmlReader object.
XmlReader reader = XmlReader.Create("inlineSchema.xml", settings);
// Parse the file.
while (reader.Read());
}
// Display any warnings or errors.
private static void ValidationCallBack (object sender, ValidationEventArgs args) {
if (args.Severity==XmlSeverityType.Warning)
Console.WriteLine("\tWarning: Matching schema not found. No validation occurred." + args.Message);
else
Console.WriteLine("\tValidation error: " + args.Message);
}
}
输入
示例使用 inlineSchema.xml 文件作为输入。
<root>
<!--Start of schema-->
<xs:schema xmlns:xs='http://www.w3.org/2001/XMLSchema'
xmlns='xsdHeadCount'
targetNamespace='xsdHeadCount'>
<xs:element name='HeadCount'>
<xs:complexType>
<xs:sequence>
<xs:element name='ID' type='xs:unsignedShort' maxOccurs='unbounded' />
</xs:sequence>
<xs:attribute name='division' type='xs:string' use='optional' default='QA'/>
</xs:complexType>
</xs:element>
</xs:schema>
<!--End of schema-->
<hc:HeadCount xmlns:hc='xsdHeadCount'>
<ID>12365</ID>
<ID>43295</ID>
<division>Accounting</division>
</hc:HeadCount>
</root>
输出
警告：找不到匹配的架构。 未进行任何验证。 找不到元素“root”的架构信息。
验证错误：元素“xsdHeadCount:HeadCount”包含无效的子元素“division”。 应为“ID”。