XmlDocument XmlDocument XmlDocument XmlDocument Constructors

Definition

Überlädt

XmlDocument() XmlDocument() XmlDocument()

Initialisiert eine neue Instanz der XmlDocument-Klasse.Initializes a new instance of the XmlDocument class.

XmlDocument(XmlImplementation) XmlDocument(XmlImplementation) XmlDocument(XmlImplementation) XmlDocument(XmlImplementation)

Initialisiert eine neue Instanz der XmlDocument-Klasse mit der angegebenen XmlImplementation.Initializes a new instance of the XmlDocument class with the specified XmlImplementation.

XmlDocument(XmlNameTable) XmlDocument(XmlNameTable) XmlDocument(XmlNameTable) XmlDocument(XmlNameTable)

Initialisiert eine neue Instanz der XmlDocument-Klasse mit der angegebenen XmlNameTable.Initializes a new instance of the XmlDocument class with the specified XmlNameTable.

XmlDocument() XmlDocument() XmlDocument()

Initialisiert eine neue Instanz der XmlDocument-Klasse.Initializes a new instance of the XmlDocument class.

public:
 XmlDocument();
public XmlDocument ();
Public Sub New ()

Beispiele

Im folgenden finden Sie ein Beispiel für die Überprüfung der Lade Zeit.The following is an example of load-time validation. Eine DTD-Überprüfung (Document Type Definition XmlReader ) wird an die Load -Methode über ValidationEventHandler mittelt, und ein wird bereitgestellt, um Benutzer über Validierungs Fehler zu benachrichtigen.A document type definition (DTD) validating XmlReader is passed to the Load method and a ValidationEventHandler is provided to notify users of any validation errors. In diesem Beispiel wurde ein Validierungs Fehler gefunden, aber das Dokument ist immer noch geladen.In this example a validation error is found, but the document is still loaded. Alternativ können Sie eine XmlReader Überprüfung definieren, um eine Ausnahme auszulösen und den Ladevorgang anzuhalten, wenn ein Validierungs Fehler gefunden wird, indem Sie nicht ValidationEventHandlerangeben.Alternatively, you can define a validating XmlReader to throw an exception and stop the load process when a validation error is found by not specifying the ValidationEventHandler. Weitere Informationen zum Überprüfen von XML-Daten finden Sie im Abschnitt Hinweise der XmlReader-Referenzseite.For more information about validating XML data, see the Remarks section of the XmlReader reference page.

#using <System.Xml.dll>

using namespace System;
using namespace System::Xml;
using namespace System::Xml::Schema;

ref class XmlDocumentSample
{
private:
    static XmlReader^ reader;
    static String^ filename = "bookdtd.xml";

    // Display the validation error.
    static void ValidationCallback(Object^ sender, ValidationEventArgs^ args)
    {
        Console::WriteLine("Validation error loading: {0}", filename);
        Console::WriteLine(args->Message);
    }

public:
    static void Main()
    {
        ValidationEventHandler^ eventHandler = gcnew ValidationEventHandler(XmlDocumentSample::ValidationCallback);

        try
        {
            // Create the validating reader and specify DTD validation.
            XmlReaderSettings^ settings = gcnew XmlReaderSettings();
                        settings->DtdProcessing = DtdProcessing::Parse;
            settings->ValidationType = ValidationType::DTD;
            settings->ValidationEventHandler += eventHandler;

            reader = XmlReader::Create(filename, settings);

            // Pass the validating reader to the XML document.
            // Validation fails due to an undefined attribute, but the 
            // data is still loaded into the document.
            XmlDocument^ doc = gcnew XmlDocument();
            doc->Load(reader);
            Console::WriteLine(doc->OuterXml);
        }
        finally
        {
            if (reader != nullptr)
                reader->Close();
        }
    }
};

int main()
{
    XmlDocumentSample::Main();
    return 0;
}
using System;
using System.Xml;
using System.Xml.Schema;

namespace Microsoft.Samples.Xml
{
    sealed class XmlDocumentSample
    {
        private XmlDocumentSample() { }

        static XmlReader reader;
        static String filename = "bookdtd.xml";

        public static void Main()
        {

            ValidationEventHandler eventHandler = new ValidationEventHandler(XmlDocumentSample.ValidationCallback);

            try
            {
                // Create the validating reader and specify DTD validation.
                XmlReaderSettings settings = new XmlReaderSettings();
                settings.DtdProcessing = DtdProcessing.Parse;
                settings.ValidationType = ValidationType.DTD;
                settings.ValidationEventHandler += eventHandler;

                reader = XmlReader.Create(filename, settings);

                // Pass the validating reader to the XML document.
                // Validation fails due to an undefined attribute, but the 
                // data is still loaded into the document.
                XmlDocument doc = new XmlDocument();
                doc.Load(reader);
                Console.WriteLine(doc.OuterXml);
            }
            finally
            {
                if (reader != null)
                    reader.Close();
            }
        }

        // Display the validation error.
        private static void ValidationCallback(object sender, ValidationEventArgs args)
        {
            Console.WriteLine("Validation error loading: {0}", filename);
            Console.WriteLine(args.Message);
        }
    }
}
Option Explicit On
Option Strict On

Imports System.Xml
Imports System.Xml.Schema

Namespace Microsoft.Samples.Xml

    NotInheritable Class XmlDocumentSample

        Private Sub New()

        End Sub

        Shared reader As XmlReader
        Shared filename As String = "bookdtd.xml"

        Public Shared Sub Main()


            Dim eventHandler As New ValidationEventHandler(AddressOf XmlDocumentSample.ValidationCallback)

            Try

                ' Create the validating reader and specify DTD validation.
                Dim settings As New XmlReaderSettings()
                settings.DtdProcessing = DtdProcessing.Parse
                settings.ValidationType = ValidationType.DTD
                AddHandler settings.ValidationEventHandler, eventHandler

                reader = XmlReader.Create(filename, settings)

                ' Pass the validating reader to the XML document.
                ' Validation fails due to an undefined attribute, but the 
                ' data is still loaded into the document.
                Dim doc As New XmlDocument()
                doc.Load(reader)
                Console.WriteLine(doc.OuterXml)
            
            Finally

                If Not (reader Is Nothing) Then
                    reader.Close()
                End If

            End Try

        End Sub

        ' Display the validation error.
        Private Shared Sub ValidationCallback(ByVal sender As Object, ByVal args As ValidationEventArgs)
            Console.WriteLine("Validation error loading: {0}", filename)
            Console.WriteLine(args.Message)
        End Sub

    End Class
End Namespace

In diesem Beispiel wird die Datei bookDTD.xml als Eingabe verwendet.The example uses the bookDTD.xml file as input.

<!DOCTYPE bookstore [
  <!ELEMENT bookstore (book)*> 
  <!ELEMENT book (title,author,price)>
  <!ATTLIST book genre CDATA #REQUIRED>
  <!ELEMENT title (#PCDATA)>
  <!ELEMENT author (#PCDATA)>
  <!ELEMENT price (#PCDATA)>]>
<bookstore>
  <book genre="fantasy"  ISBN="2-3631-4">
    <title>Oberon's Legacy</title>
    <author>Corets, Eva</author>
    <price>5.95</price>
  </book>
</bookstore>
Siehe auch

XmlDocument(XmlImplementation) XmlDocument(XmlImplementation) XmlDocument(XmlImplementation) XmlDocument(XmlImplementation)

Initialisiert eine neue Instanz der XmlDocument-Klasse mit der angegebenen XmlImplementation.Initializes a new instance of the XmlDocument class with the specified XmlImplementation.

protected public:
 XmlDocument(System::Xml::XmlImplementation ^ imp);
protected internal XmlDocument (System.Xml.XmlImplementation imp);
new System.Xml.XmlDocument : System.Xml.XmlImplementation -> System.Xml.XmlDocument
Protected Friend Sub New (imp As XmlImplementation)

Parameter

imp
XmlImplementation XmlImplementation XmlImplementation XmlImplementation

Der zu verwendende XmlImplementation.The XmlImplementation to use.

XmlDocument(XmlNameTable) XmlDocument(XmlNameTable) XmlDocument(XmlNameTable) XmlDocument(XmlNameTable)

Initialisiert eine neue Instanz der XmlDocument-Klasse mit der angegebenen XmlNameTable.Initializes a new instance of the XmlDocument class with the specified XmlNameTable.

public:
 XmlDocument(System::Xml::XmlNameTable ^ nt);
public XmlDocument (System.Xml.XmlNameTable nt);
new System.Xml.XmlDocument : System.Xml.XmlNameTable -> System.Xml.XmlDocument
Public Sub New (nt As XmlNameTable)

Parameter

nt
XmlNameTable XmlNameTable XmlNameTable XmlNameTable

Der zu verwendende XmlNameTable.The XmlNameTable to use.

Gilt für: