ValidationEventArgs.Severity プロパティとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

ValidationEventArgs.Severity プロパティ

検証イベントの重大度レベルを取得します。

名前空間: System.Xml.Schema
アセンブリ: System.Xml (system.xml.dll 内)
構文

Visual Basic (宣言)

Public ReadOnly Property
 Severity As XmlSeverityType

Visual Basic (使用法)

Dim instance As ValidationEventArgs
Dim value As XmlSeverityType

value = instance.Severity

public XmlSeverityType Severity { get; }

C++

public:
property XmlSeverityType Severity {
    XmlSeverityType get ();
}

/** @property */
public XmlSeverityType get_Severity ()

JScript

public function get Severity
 () : XmlSeverityType

プロパティ値
検証イベントの重大度レベルを表す XmlSeverityType 値。

使用例

XML ファイルを検証して、検出されたエラーまたは警告を生成する例を次に示します。

Visual Basic

Imports System
Imports System.IO
Imports System.Xml
Imports System.Xml.Schema

Public Class Sample

    Public Shared Sub Main()

        'Load the XmlSchemaSet.
        Dim schemaSet As New
 XmlSchemaSet()
        schemaSet.Add("urn:bookstore-schema", "books.xsd")

        'Validate the file using the schema stored in the schema set.
        'Any elements belonging to the namespace "urn:cd-schema"
 generate
        'a warning because there is no schema matching that namespace.
        Validate("store.xml", schemaSet)

    End Sub

    Shared Sub Validate(ByVal
 filename As String, ByVal
 schemaSet As XmlSchemaSet)

        Console.WriteLine()
        Console.WriteLine("\r\nValidating XML file {0}...",
 filename.ToString())

        Dim compiledSchema As XmlSchema = Nothing

        For Each schema As
 XmlSchema In schemaSet.Schemas()
            compiledSchema = schema
        Next

        Dim settings As New
 XmlReaderSettings()
        settings.Schemas.Add(compiledSchema)
        AddHandler settings.ValidationEventHandler, AddressOf
 ValidationCallBack
        settings.ValidationType = ValidationType.Schema

        'Create the schema validating reader.
        Dim vreader As XmlReader = XmlReader.Create(filename,
 settings)

        While (vreader.Read())

        End While

        'Close the reader.
        vreader.Close()
    End Sub

    'Display any warnings or errors.
    Private Shared Sub ValidationCallBack(ByVal
 sender As Object, ByVal
 args As ValidationEventArgs)
        If (args.Severity = XmlSeverityType.Warning) Then
            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.IO;
using System.Xml;
using System.Xml.Schema;

public class Sample
{

    public static void Main()
    {
        //Load the XmlSchemaSet.
        XmlSchemaSet schemaSet = new XmlSchemaSet();
        schemaSet.Add("urn:bookstore-schema", "books.xsd");

        //Validate the file using the schema stored in the schema set.
        //Any elements belonging to the namespace "urn:cd-schema"
 generate
        //a warning because there is no schema matching that namespace.
        Validate("store.xml", schemaSet);
        Console.ReadLine();
    }

    private static void
 Validate(String filename, XmlSchemaSet schemaSet)
    {
        Console.WriteLine();
        Console.WriteLine("\r\nValidating XML file {0}...", filename.ToString());

        XmlSchema compiledSchema = null;

        foreach (XmlSchema schema in schemaSet.Schemas())
        {
            compiledSchema = schema;
        }

        XmlReaderSettings settings = new XmlReaderSettings();
        settings.Schemas.Add(compiledSchema);
        settings.ValidationEventHandler += new ValidationEventHandler(ValidationCallBack);
        settings.ValidationType = ValidationType.Schema;

        //Create the schema validating reader.
        XmlReader vreader = XmlReader.Create(filename, settings);

        while (vreader.Read()) { }

        //Close the reader.
        vreader.Close();
    }

    //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);

    }
}

前述の例では、次の入力ファイルを使用しています。

store.xml

<?xml version='1.0'?>
<bookstore xmlns="urn:bookstore-schema"
 xmlns:cd="urn:cd-schema">
  <book genre="novel">
    <title>The Confidence
 Man</title>
    <price>11.99</price>
  </book>
  <cd:cd>
    <title>Americana</title>
    <cd:artist>Offspring</cd:artist>
    <price>16.95</price>
  </cd:cd>
</bookstore>

books.xsd

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns="urn:bookstore-schema"
    elementFormDefault="qualified"
    targetNamespace="urn:bookstore-schema">

 <xsd:element name="bookstore"
 type="bookstoreType"/>

 <xsd:complexType name="bookstoreType">
  <xsd:sequence maxOccurs="unbounded">
   <xsd:element name="book"
  type="bookType"/>
  </xsd:sequence>
 </xsd:complexType>

 <xsd:complexType name="bookType">
  <xsd:sequence>
   <xsd:element name="title"
 type="xsd:string"/>
   <xsd:element name="author"
 type="authorName"/>
   <xsd:element name="price"
  type="xsd:decimal"/>
  </xsd:sequence>
  <xsd:attribute name="genre"
 type="xsd:string"/>
 </xsd:complexType>

 <xsd:complexType name="authorName">
  <xsd:sequence>
   <xsd:element name="first-name"
  type="xsd:string"/>
   <xsd:element name="last-name"
 type="xsd:string"/>
  </xsd:sequence>
 </xsd:complexType>

</xsd:schema>