XmlDocument Конструкторы

Исходный код:

XmlDocument.cs

Исходный код:

XmlDocument.cs

Исходный код:

XmlDocument.cs

public:
 XmlDocument();

public XmlDocument ();

Public Sub New ()

Примеры

Ниже приведен пример проверки во время загрузки. Проверка определения типа документа (DTD) XmlReader передается методу Load , а ValidationEventHandler также предоставляется для уведомления пользователей о любых ошибках проверки. В этом примере обнаружена ошибка проверки, но документ по-прежнему загружается. Кроме того, можно определить проверку, создающую XmlReader исключение, и остановить процесс загрузки при обнаружении ошибки проверки, не указав ValidationEventHandler. Дополнительные сведения о проверке данных XML см. в подразделе примечаний на справочной странице XmlReader.

#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

В примере в качестве входных данных используется файл bookDTD.xml.

<!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>

См. также раздел

• Load(String)
• LoadXml(String)

Исходный код:

XmlDocument.cs

Исходный код:

XmlDocument.cs

Исходный код:

XmlDocument.cs

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)

Параметры

Исходный код:

XmlDocument.cs

Исходный код:

XmlDocument.cs

Исходный код:

XmlDocument.cs

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)

Параметры