Csharp/C Sharp/XML LINQ/Schema Validating
Содержание
Creating an XSD Schema by Inferring Itfrom an XML Document
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Schema; using System.Xml.Linq; public class MainClass {
public static void Main() {
XDocument xDocument = new XDocument(
new XElement("Books",
new XElement("Book",
new XAttribute("type", "Author"),
new XElement("FirstName", "A"),
new XElement("LastName", "B")),
new XElement("Book",
new XAttribute("type", "Author"),
new XElement("FirstName", "C"),
new XElement("LastName", "D"))));
Console.WriteLine(xDocument);
xDocument.Save("bookparticipants.xml");
XmlSchemaInference infer = new XmlSchemaInference();
XmlSchemaSet schemaSet = infer.InferSchema(new XmlTextReader("bookparticipants.xml"));
XmlWriter w = XmlWriter.Create("bookparticipants.xsd");
foreach (XmlSchema schema in schemaSet.Schemas()) {
schema.Write(w);
}
w.Close();
XDocument newDocument = XDocument.Load("bookparticipants.xsd");
Console.WriteLine(newDocument);
}
}
</source>
Successfully Validating an XML Element
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Schema; using System.Xml.Linq; using System.IO; public class MainClass {
public static void Main() {
string schema =
@"<?xml version="1.0" encoding="utf-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified"
xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="Books">
<xs:complexType>
<xs:sequence>
<xs:element maxOccurs="unbounded" name="Book">
<xs:complexType>
<xs:sequence>
<xs:element name="FirstName" type="xs:string" />
<xs:element minOccurs="0" name="MiddleInitial"
type="xs:string" />
<xs:element name="LastName" type="xs:string" />
</xs:sequence>
<xs:attribute name="type" type="xs:string" use="required" />
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>";
XmlSchemaSet schemaSet = new XmlSchemaSet();
schemaSet.Add("", XmlReader.Create(new StringReader(schema)));
}
}
</source>
Validating an XML Document
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Schema; using System.Xml.Linq; public class MainClass {
public static void Main() {
XDocument xDocument = new XDocument(
new XElement("Books",
new XElement("Book",
new XAttribute("type", "Author"),
new XElement("FirstName", "A"),
new XElement("MiddleName", "Carson"),
new XElement("LastName", "B")),
new XElement("Book",
new XAttribute("type", "Author"),
new XElement("FirstName", "C"),
new XElement("LastName", "D"))));
Console.WriteLine(xDocument);
XmlSchemaSet schemaSet = new XmlSchemaSet();
schemaSet.Add(null, "bookparticipants.xsd");
xDocument.Validate(schemaSet, (o, vea) => {
Console.WriteLine(o.GetType().Name);
Console.WriteLine(vea.Message);
},true);
foreach (XElement element in xDocument.Descendants()) {
Console.WriteLine("Element {0} is {1}", element.Name,
element.GetSchemaInfo().Validity);
XmlSchemaElement se = element.GetSchemaInfo().SchemaElement;
if (se != null) {
Console.WriteLine(
"Schema element {0} must have MinOccurs = {1} and MaxOccurs = {2}{3}",
se.Name, se.MinOccurs, se.MaxOccurs, System.Environment.NewLine);
} else {
Console.WriteLine();
}
}
}
}
</source>
Validating an XML Document with a Lambda Expression
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Schema; using System.Xml.Linq; public class MainClass {
public static void Main() {
XDocument xDocument = new XDocument(
new XElement("Books",
new XElement("Book",
new XAttribute("type", "Author"),
new XAttribute("language", "English"),
new XElement("FirstName", "A"),
new XElement("LastName", "B")),
new XElement("Book",
new XAttribute("type", "Author"),
new XElement("FirstName", "C"),
new XElement("LastName", "D"))));
Console.WriteLine(xDocument);
XmlSchemaSet schemaSet = new XmlSchemaSet();
schemaSet.Add(null, "bookparticipants.xsd");
try {
xDocument.Validate(schemaSet, (o, vea) => {
Console.WriteLine(o.GetType().Name);
Console.WriteLine(vea.Message);
throw (new Exception(vea.Message));
});
} catch (Exception ex) {
Console.WriteLine("Exception occurred: {0}", ex.Message);
}
}
}
</source>
Validating an XML Document with Default Validation Event Handling
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Schema; using System.Xml.Linq; public class MainClass {
public static void Main() {
XDocument xDocument = new XDocument(
new XElement("Books",
new XElement("Book",
new XAttribute("type", "Author"),
new XElement("FirstName", "A"),
new XElement("MiddleInitial", "C"),
new XElement("LastName", "B")),
new XElement("Book",
new XAttribute("type", "Author"),
new XElement("FirstName", "C"),
new XElement("LastName", "D"))));
Console.WriteLine(xDocument);
XmlSchemaSet schemaSet = new XmlSchemaSet();
schemaSet.Add(null, "bookparticipants.xsd");
try {
xDocument.Validate(schemaSet, null);
} catch (XmlSchemaValidationException ex) {
Console.WriteLine("Exception occurred: {0}", ex.Message);
}
}
}
</source>
