XmlDocument XmlDocument XmlDocument XmlDocument Constructors

Definition

Overloads

XmlDocument() XmlDocument() XmlDocument()

Initializes a new instance of the XmlDocument class.

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

Initializes a new instance of the XmlDocument class with the specified XmlImplementation.

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

Initializes a new instance of the XmlDocument class with the specified XmlNameTable.

XmlDocument() XmlDocument() XmlDocument()

Initializes a new instance of the XmlDocument class.

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

Examples

The following is an example of load-time validation. 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 this example a validation error is found, but the document is still loaded. 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. 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
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

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>
See also

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

Parameters

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

Parameters

nt
XmlNameTable XmlNameTable XmlNameTable XmlNameTable

The XmlNameTable to use.

Applies to