SignedXml.XmlDsigBase64TransformUrl フィールド

.NET Framework クラス ライブラリ リファレンス

SignedXml.XmlDsigBase64TransformUrl フィールド

メモ : このフィールドは、.NET Framework version 2.0 で新しく追加されたものです。

base 64 変換の URI (Uniform Resource Identifier) を表します。このフィールドは定数です。

名前空間: System.Security.Cryptography.Xml
アセンブリ: System.Security (system.security.dll 内)
構文

Visual Basic (宣言)

Public Const XmlDsigBase64TransformUrl As
 String

Visual Basic (使用法)

Dim value As String

value = SignedXml.XmlDsigBase64TransformUrl

C#

public const string XmlDsigBase64TransformUrl

C++

public:
literal String^ XmlDsigBase64TransformUrl

J#

public static final String XmlDsigBase64TransformUrl

JScript

public const var XmlDsigBase64TransformUrl
 : String

解説

XmlDsigBase64TransformUrl フィールドの値は "http://www.w3.org/2000/09/xmldsig#base64" です。

XMLDSIG 用の要素のいずれかの URI 属性に対し効率よく値を提供するには、このフィールドを使用します。

XmlDsigBase64Transform クラスは、XmlDsigBase64TransformUrl フィールドで定義された変換を実装します。

詳細については、http://www.w3.org/2000/09/xmldsig#base64 の 「W3C (World Wide Web Consortium) 仕様」を参照してください。

使用例

XmlDsigBase64Transform クラスのメンバを使用する方法を次のコード例に示します。

Visual Basic

Imports System
Imports System.IO
Imports System.Xml
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml


Public Class Form1
    Inherits System.Windows.Forms.Form

    ' Event handler for Run button.
    Private Sub Button1_Click( _
        ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles
 Button1.Click

        tbxOutput.Cursor = Cursors.WaitCursor
        tbxOutput.Text = ""

        ' Encrypt an XML message
        EncryptXML(LoadXMLDoc())

        ' Using XmlDsigBase64Transform resolving a Uri.
        Dim baseUri As New
 Uri("http://www.microsoft.com")
        Dim relativeUri As String
 = "msdn"
        Dim absoluteUri As Uri = ResolveUris(baseUri,
 relativeUri)

        ' Reset the cursor and conclude application.
        WriteLine(vbCrLf + "This sample completed successfully;"
 + _
            " press Exit to continue.")
        tbxOutput.Cursor = Cursors.Default
    End Sub

    ' Encrypt the text in the specified XmlDocument.
    Private Sub EncryptXML(ByVal
 xmlDoc As XmlDocument)
        Dim xmlTransform As New
 XmlDsigBase64Transform

        ' Ensure the transform is using the proper algorithm.
        xmlTransform.Algorithm = SignedXml.XmlDsigBase64TransformUrl

        ' Retrieve the XML representation of the current transform.
        Dim xmlInTransform As XmlElement =
 xmlTransform.GetXml()

        WriteLine("Xml representation of the current transform:
 ")
        WriteLine(xmlInTransform.OuterXml)

        ' Retrieve the valid input types for the current transform.
        Dim validInTypes() As Type = xmlTransform.InputTypes

        ' Verify the xmlTransform can accept the XMLDocument as an
        ' input type.
        For i As Int16 = 0 To
 validInTypes.Length Step 1
            If (validInTypes(i).Equals(xmlDoc.GetType())) Then
                ' Demonstrate loading the entire Xml Document.
                xmlTransform.LoadInput(xmlDoc)

                ' This transform is created for demonstration purposes.
                Dim secondTransform As New
 XmlDsigBase64Transform

                Dim classDescription As String
 = secondTransform.ToString()

                ' This call does not perform as expected.
                ' LoadInnerXml is overridden by the XmlDsigBase64Transform
                ' class, but is stubbed out.
                secondTransform.LoadInnerXml(xmlDoc.SelectNodes("//."))

                Exit For
            End If
        Next
        Dim validOutTypes() As Type = xmlTransform.OutputTypes

        For i As Int16 = 0 To
 validOutTypes.Length Step 1
            If (validOutTypes(i).equals(GetType(System.IO.Stream)))
 Then
                Try
                    Dim streamType As Type
 = GetType(System.IO.Stream)

                    Dim outputStream As CryptoStream
                    outputStream = CType( _
                        xmlTransform.GetOutput(streamType), _
                        CryptoStream)


                    ' Read the CryptoStream into a stream reader.
                    Dim streamReader As New
 StreamReader(outputStream)

                    ' Read the stream into a string.
                    Dim outputMessage As String
 = streamReader.ReadToEnd()

                    ' Close the streams.
                    outputStream.Close()
                    streamReader.Close()

                    ' Display to the console the Xml before and after
                    ' encryption.
                    WriteLine("Encoding the following message:
 " + _
                        xmlDoc.InnerText)
                    WriteLine("Message encoded: "
 + outputMessage)

                Catch ex As Exception
                    WriteLine("Unexpected exception caught: "
 + _
                        ex.ToString())

                End Try

                ' Stop cycling through types, exit operation.
                Exit For
            Else
                Dim outputObject As Object
 = xmlTransform.GetOutput()
            End If
        Next
    End Sub

    ' Create an XML document with Element and Text nodes.
    Private Function LoadXMLDoc() As
 XmlDocument
        Dim xmlDoc As New
 XmlDocument

        Dim mainNode As XmlNode = xmlDoc.CreateNode(
 _
            XmlNodeType.Element, _
            "ContosoMessages", _
            "http://www.contoso.com")

        Dim textNode As XmlNode
        textNode = xmlDoc.CreateTextNode("Some text to encode.")
        mainNode.AppendChild(textNode)
        xmlDoc.AppendChild(mainNode)

        WriteLine("Created the following XML Document for "
 + _
            "transformation: ")
        WriteLine(xmlDoc.InnerXml)
        Return xmlDoc
    End Function

    ' Resolve the specified base and relative Uri's .
    Private Function ResolveUris( _
        ByVal baseUri As Uri, _
        ByVal relativeUri As String)
 As Uri

        Dim xmlResolver As New
 XmlUrlResolver
        xmlResolver.Credentials = _
            System.Net.CredentialCache.DefaultCredentials

        Dim xmlTransform As New
 XmlDsigBase64Transform
        xmlTransform.Resolver = xmlResolver

        Dim absoluteUri As Uri = _
            xmlResolver.ResolveUri(baseUri, relativeUri)

        If Not absoluteUri Is
 Nothing Then
            WriteLine( _
                "Resolved the base Uri and relative Uri to the
 following:")
            WriteLine(absoluteUri.ToString())
        Else
            WriteLine("Unable to resolve the base Uri and relative
 Uri")
        End If
        Return absoluteUri
    End Function

    ' Write message and carriage return to the output textbox.
    Private Sub WriteLine(ByVal
 message As String)
        tbxOutput.AppendText(message + vbCrLf)
    End Sub

    ' Event handler for Exit button.
    Private Sub Button2_Click( _
        ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles
 Button2.Click

        Application.Exit()
    End Sub
#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call

    End Sub

    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides
 Sub Dispose(ByVal disposing As
 Boolean)
        If disposing Then
            If Not (components Is
 Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    Friend WithEvents Panel2 As
 System.Windows.Forms.Panel
    Friend WithEvents Panel1 As
 System.Windows.Forms.Panel
    Friend WithEvents Button1 As
 System.Windows.Forms.Button
    Friend WithEvents Button2 As
 System.Windows.Forms.Button
    Friend WithEvents tbxOutput As
 System.Windows.Forms.RichTextBox
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.Panel2 = New System.Windows.Forms.Panel
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Panel1 = New System.Windows.Forms.Panel
        Me.tbxOutput = New System.Windows.Forms.RichTextBox
        Me.Panel2.SuspendLayout()
        Me.Panel1.SuspendLayout()
        Me.SuspendLayout()
        '
        'Panel2
        '
        Me.Panel2.Controls.Add(Me.Button1)
        Me.Panel2.Controls.Add(Me.Button2)
        Me.Panel2.Dock = System.Windows.Forms.DockStyle.Bottom
        Me.Panel2.DockPadding.All = 20
        Me.Panel2.Location = New System.Drawing.Point(0,
 320)
        Me.Panel2.Name = "Panel2"
        Me.Panel2.Size = New System.Drawing.Size(616,
 64)
        Me.Panel2.TabIndex = 1
        '
        'Button1
        '
        Me.Button1.Dock = System.Windows.Forms.DockStyle.Right
        Me.Button1.Font = New System.Drawing.Font(
 _
            "Microsoft Sans Serif", _
            9.0!, _
            System.Drawing.FontStyle.Regular, _
            System.Drawing.GraphicsUnit.Point, _
            CType(0, Byte))
        Me.Button1.Location = New System.Drawing.Point(446,
 20)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(75,
 24)
        Me.Button1.TabIndex = 2
        Me.Button1.Text = "&Run"
        '
        'Button2
        '
        Me.Button2.Dock = System.Windows.Forms.DockStyle.Right
        Me.Button2.Font = New System.Drawing.Font(
 _
            "Microsoft Sans Serif", _
            9.0!, _
            System.Drawing.FontStyle.Regular, _
            System.Drawing.GraphicsUnit.Point, _
            CType(0, Byte))
        Me.Button2.Location = New System.Drawing.Point(521,
 20)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(75,
 24)
        Me.Button2.TabIndex = 3
        Me.Button2.Text = "E&xit"
        '
        'Panel1
        '
        Me.Panel1.Controls.Add(Me.tbxOutput)
        Me.Panel1.Dock = System.Windows.Forms.DockStyle.Fill
        Me.Panel1.DockPadding.All = 20
        Me.Panel1.Location = New System.Drawing.Point(0,
 0)
        Me.Panel1.Name = "Panel1"
        Me.Panel1.Size = New System.Drawing.Size(616,
 320)
        Me.Panel1.TabIndex = 2
        '
        'tbxOutput
        '
        Me.tbxOutput.AccessibleDescription = _
            "Displays output from application."
        Me.tbxOutput.AccessibleName = "Output
 textbox."
        Me.tbxOutput.Dock = System.Windows.Forms.DockStyle.Fill
        Me.tbxOutput.Location = New System.Drawing.Point(20,
 20)
        Me.tbxOutput.Name = "tbxOutput"
        Me.tbxOutput.Size = New System.Drawing.Size(576,
 280)
        Me.tbxOutput.TabIndex = 1
        Me.tbxOutput.Text = "Click the Run
 button to run the application."
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6,
 15)
        Me.ClientSize = New System.Drawing.Size(616,
 384)
        Me.Controls.Add(Me.Panel1)
        Me.Controls.Add(Me.Panel2)
        Me.Name = "Form1"
        Me.Text = "XmlDsigBase64Transform"
        Me.Panel2.ResumeLayout(False)
        Me.Panel1.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region
End Class
'
' This sample produces the following output:
'
' Created the following XML Document for transformation: 
' <ContosoMessages xmlns="http://www.contoso.com">Some
 text to encode.
' </ContosoMessages>
' Xml representation of the current transform: 
' <Transform Algorithm="http://www.w3.org/2000/09/xmldsig#base64"
 xmlns=
' "http://www.w3.org/2000/09/xmldsig#" />
' Encoding the following message: Some text to encode.
' Message encoded: Jmr^
' Resolved the base Uri and relative Uri to the following:
' http://www.microsoft.com/msdn
' 
' This sample completed successfully; press Exit to continue.

C#

using System;
using System.IO;
using System.Xml;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;

class Class1
{
    [STAThread]
    static void Main(string[]
 args)
    {
        // Encrypt an XML message
        EncryptXML(LoadXMLDoc());

        // Using XmlDsigBase64Transform resolving a Uri.
        Uri baseUri = new Uri("http://www.microsoft.com");
        string relativeUri = "msdn";
        Uri absoluteUri = ResolveUris(baseUri, relativeUri);

        Console.WriteLine("This sample completed successfully; " +
            "press Enter to exit.");
        Console.ReadLine();
    }

    // Encrypt the text in the specified XmlDocument.
    private static void
 EncryptXML(XmlDocument xmlDoc)
    {
        XmlDsigBase64Transform xmlTransform = new XmlDsigBase64Transform();

        // Ensure the transform is using the proper algorithm.
        xmlTransform.Algorithm = SignedXml.XmlDsigBase64TransformUrl;

        // Retrieve the XML representation of the current transform.
        XmlElement xmlInTransform = xmlTransform.GetXml();

        Console.WriteLine("Xml representation of the current transform: ");
        Console.WriteLine(xmlInTransform.OuterXml);

        // Retrieve the valid input types for the current transform.
        Type[] validInTypes = xmlTransform.InputTypes;

        // Verify the xmlTransform can accept the XMLDocument as an
        // input type.
        for (int i=0; i<validInTypes.Length;
 i++)
        {
            if (validInTypes[i] == xmlDoc.GetType())
            {
                // Demonstrate loading the entire Xml Document.
                xmlTransform.LoadInput(xmlDoc);

                // This transform is created for demonstration purposes.
                XmlDsigBase64Transform secondTransform =
                    new XmlDsigBase64Transform();

                string classDescription = secondTransform.ToString();

                // This call does not perform as expected.
                // LoadInnerXml is overridden by the XmlDsigBase64Transform
                // class, but is stubbed out.
                secondTransform.LoadInnerXml(xmlDoc.SelectNodes("//."));

                break;
            }
        }

        Type[] validOutTypes = xmlTransform.OutputTypes;

        for (int i=0; i<validOutTypes.Length;
 i++)
        {
            if (validOutTypes[i] == typeof(System.IO.Stream))
            {
                try 
                {
                    Type streamType = typeof(System.IO.Stream);
                    CryptoStream outputStream = (CryptoStream) 
                        xmlTransform.GetOutput(streamType);

                    // Read the CryptoStream into a stream reader.
                    StreamReader streamReader =
                        new StreamReader(outputStream);

                    // Read the stream into a string.
                    string outputMessage = streamReader.ReadToEnd();

                    // Close the streams.
                    outputStream.Close();
                    streamReader.Close();

                    // Display to the console the Xml before and after
                    // encryption.
                    Console.WriteLine("Encoding the following message: "
 +
                        xmlDoc.InnerText);
                    Console.WriteLine("Message encoded: " + outputMessage);
            }
                catch (Exception ex)
                {
                    Console.WriteLine("Unexpected exception caught: " +
                        ex.ToString());
                }

                break;
            }
            else
            {
                object outputObject = xmlTransform.GetOutput();
            }
        }
    }

    // Create an XML document with Element and Text nodes.
    private static XmlDocument LoadXMLDoc()
    {
        XmlDocument xmlDoc = new XmlDocument();

        XmlNode mainNode = xmlDoc.CreateNode(
            XmlNodeType.Element,
            "ContosoMessages",
            "http://www.contoso.com");

        XmlNode textNode = xmlDoc.CreateTextNode("Some text to encode.");
        mainNode.AppendChild(textNode);
        xmlDoc.AppendChild(mainNode);

        Console.WriteLine("Created the following XML Document for
 " +
            "transformation: ");
        Console.WriteLine(xmlDoc.InnerXml);
        return xmlDoc;
    }

    // Resolve the specified base and relative Uri's .
    private static Uri ResolveUris(Uri baseUri,
 string relativeUri)
    {
        XmlUrlResolver xmlResolver = new XmlUrlResolver();
        xmlResolver.Credentials = 
            System.Net.CredentialCache.DefaultCredentials;

        XmlDsigBase64Transform xmlTransform = new XmlDsigBase64Transform();
        xmlTransform.Resolver = xmlResolver;

        Uri absoluteUri = xmlResolver.ResolveUri(baseUri, relativeUri);

        if (absoluteUri != null)
        {
            Console.WriteLine(
                "Resolved the base Uri and relative Uri to
 the following:");
            Console.WriteLine(absoluteUri.ToString());
        }
        else
        {
            Console.WriteLine(
                "Unable to resolve the base Uri and relative
 Uri");
        }
        return absoluteUri;
    }
}
//
// This sample produces the following output:
//
// Created the following XML Document for transformation:
// <ContosoMessages xmlns="http://www.contoso.com">Some
 text to encode.
// </ContosoMessages>
// Xml representation of the current transform:
// <Transform Algorithm="http://www.w3.org/2000/09/xmldsig#base64"
 xmlns=
// "http://www.w3.org/2000/09/xmldsig#" />
// Encoding the following message: Some text to encode.
// Message encoded: Jmr^
// Resolved the base Uri and relative Uri to the following:
// http://www.microsoft.com/msdn
// This sample completed successfully; press Enter to exit.

C++

#using <System.dll>
#using <System.Xml.dll>
#using <System.Security.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
using namespace System::Security::Cryptography;
using namespace System::Security::Cryptography::Xml;

namespace CryptographyXmlDsigBase64Transform
{
    ref class Example
    {
    public:
        static void Produce()
        {
            
            // Encrypt an XML message
            EncryptXML(LoadXMLDoc());
            
            // Using XmlDsigBase64Transform resolving a Uri.
            Uri^ baseUri = gcnew Uri("http://www.microsoft.com");
            String^ relativeUri = "msdn";
            Uri^ absoluteUri = ResolveUris(baseUri, relativeUri);
            Console::WriteLine("This sample completed successfully; "
                "press Enter to exit.");
            Console::ReadLine();
        }


    private:

        // Encrypt the text in the specified XmlDocument.
        static void EncryptXML(XmlDocument^
 xmlDoc)
        {
            
            XmlDsigBase64Transform^ xmlTransform = 
                gcnew XmlDsigBase64Transform;
            // Ensure the transform is using the proper algorithm.
            xmlTransform->Algorithm = 
                SignedXml::XmlDsigBase64TransformUrl;
            // Retrieve the XML representation of the current 
            // transform.
            XmlElement^ xmlInTransform = xmlTransform->GetXml();
            Console::WriteLine("Xml representation of the " 
                "current transform: ");
            Console::WriteLine(xmlInTransform->OuterXml);
            
            // Retrieve the valid input types for the current 
            // transform.
            array<Type^>^ validInTypes = xmlTransform->InputTypes;
            // Verify the xmlTransform can accept the XMLDocument
            // as an input type.
            for each (Type^ validInType in
 validInTypes)
            {
                if (validInType == xmlDoc->GetType())
                {
                    
                    // Demonstrate loading the entire Xml Document.
                    xmlTransform->LoadInput(xmlDoc);
                    // This transform is created for demonstration 
                    // purposes.
                    XmlDsigBase64Transform^ secondTransform = 
                        gcnew XmlDsigBase64Transform;
                    String^ classDescription = 
                        secondTransform->ToString();
                    // This call does not perform as expected.
                    // LoadInnerXml is overridden by the 
                    // XmlDsigBase64Transform class, but is 
                    // stubbed out.
                    secondTransform->LoadInnerXml(
                        xmlDoc->SelectNodes("//."));
                    break;
                }

            }
            
            array<Type^>^ validOutTypes = xmlTransform->OutputTypes;
            for each (Type^ validOutType in
 validOutTypes)
            {
                if (validOutType == Stream::typeid)
                {
                    try
                    {
                        
                        Type^ streamType = Stream::typeid;
                        CryptoStream^ outputStream = 
                            (CryptoStream^)(xmlTransform->GetOutput(
                            streamType));
                        // Read the CryptoStream into a stream reader.
                        StreamReader^ streamReader = 
                            gcnew StreamReader(outputStream);
                        
                        // Read the stream into a string.
                        String^ outputMessage = 
                            streamReader->ReadToEnd();
                        
                        // Close the streams.
                        outputStream->Close();
                        streamReader->Close();
                        
                        // Display to the console the Xml before and
                        // after encryption.
                        Console::WriteLine("Encoding the following "
                            "message: {0}", xmlDoc->InnerText);
                        Console::WriteLine("Message encoded: {0}", 
                            outputMessage);
                    }
                    catch (CryptographicException^ ex) 
                    {
                        Console::WriteLine("Cryptographic exception "
                            "caught: {0}", ex);
                    }

                    break;
                }
                else
                {
                    
                    Object^ outputObject = xmlTransform->GetOutput();
                }

            }
        }


        // Create an XML document with Element and Text nodes.
        static XmlDocument^ LoadXMLDoc()
        {
            XmlDocument^ xmlDoc = gcnew XmlDocument;
            XmlNode^ mainNode = 
                xmlDoc->CreateNode(XmlNodeType::Element, 
                "ContosoMessages", "http://www.contoso.com");
            XmlNode^ textNode = xmlDoc->CreateTextNode("Some text "
                "to encode.");
            mainNode->AppendChild(textNode);
            xmlDoc->AppendChild(mainNode);
            Console::WriteLine("Created the following XML Document "
                "for transformation: ");
            Console::WriteLine(xmlDoc->InnerXml);
            return xmlDoc;
        }


        // Resolve the specified base and relative Uri's.
        static Uri^ ResolveUris(Uri^ baseUri, String^ relativeUri)
        {
            
            XmlUrlResolver^ xmlResolver = gcnew XmlUrlResolver;
            xmlResolver->Credentials = 
                System::Net::CredentialCache::DefaultCredentials;
            XmlDsigBase64Transform^ xmlTransform = 
                gcnew XmlDsigBase64Transform;
            xmlTransform->Resolver = xmlResolver;
            Uri^ absoluteUri = xmlResolver->ResolveUri(baseUri, 
                relativeUri);
            if (absoluteUri != nullptr)
            {
                Console::WriteLine("Resolved the base Uri
 and "
                    "relative Uri to the following:");
                Console::WriteLine(absoluteUri);
            }
            else
            {
                Console::WriteLine("Unable to resolve the base
 "
                    "Uri and relative Uri");
            }

            return absoluteUri;
        }

    };

}

int main()
{
    CryptographyXmlDsigBase64Transform::Example::Produce();
}

//
// This sample produces the following output:
//
// Created the following XML Document for transformation:
// <ContosoMessages xmlns="http://www.contoso.com">Some
 text to encode.
// </ContosoMessages>
// Xml representation of the current transform:
// <Transform Algorithm="http://www.w3.org/2000/09/xmldsig#base64"
// xmlns="http://www.w3.org/2000/09/xmldsig#" />
// Encoding the following message: Some text to encode.
// Message encoded: Jmr^
// Resolved the base Uri and relative Uri to the following:
// http://www.microsoft.com/msdn
// This sample completed successfully; press Enter to exit.

J#

import System.*;
import System.IO.*;
import System.Xml.*;
import System.Security.Cryptography.*;
import System.Security.Cryptography.Xml.*;

class Class1
{
    /** @attribute STAThread()
     */
    public static void main(String[]
 args)
    {
        // Encrypt an XML message
        EncryptXML(LoadXMLDoc());
        // Using XmlDsigBase64Transform resolving a Uri.
        Uri baseUri = new Uri("http://www.microsoft.com");
        String relativeUri = "msdn";
        Uri absoluteUri = ResolveUris(baseUri, relativeUri);

        Console.WriteLine("This sample completed successfully; " 
            + "press Enter to exit.");
        Console.ReadLine();
    } //main

    // Encrypt the text in the specified XmlDocument.
    private static void
 EncryptXML(XmlDocument xmlDoc)
    {
        XmlDsigBase64Transform xmlTransform = new XmlDsigBase64Transform();

        // Ensure the transform is using the proper algorithm.
        xmlTransform.set_Algorithm(SignedXml.XmlDsigBase64TransformUrl);

        // Retrieve the XML representation of the current transform.
        XmlElement xmlInTransform = xmlTransform.GetXml();

        Console.WriteLine("Xml representation of the current transform: ");
        Console.WriteLine(xmlInTransform.get_OuterXml());
        // Retrieve the valid input types for the current transform.
        Type validInTypes[] = xmlTransform.get_InputTypes();

        // Verify the xmlTransform can accept the XMLDocument as an
        // input type.
        for (int i = 0; i < validInTypes.get_Length();
 i++) {
            if (validInTypes.get_Item(i).Equals(xmlDoc.GetType()))
 {
                // Demonstrate loading the entire Xml Document.
                xmlTransform.LoadInput(xmlDoc);

                // This transform is created for demonstration purposes.
                XmlDsigBase64Transform secondTransform 
                    = new XmlDsigBase64Transform();
                String classDescription = secondTransform.ToString();

                // This call does not perform as expected.
                // LoadInnerXml is overridden by the XmlDsigBase64Transform
                // class, but is stubbed out.
                secondTransform.LoadInnerXml(xmlDoc.SelectNodes("//."));
                break;
            }
        }
        Type validOutTypes[] = xmlTransform.get_OutputTypes();
        for (int i = 0; i < validOutTypes.get_Length();
 i++) {
            if (validOutTypes.get_Item(i).Equals(
                System.IO.Stream.class.ToType())) {
                try {
                    Type streamType = System.IO.Stream.class.ToType();
                    CryptoStream outputStream = (CryptoStream)xmlTransform.
                        GetOutput(streamType);

                    // Read the CryptoStream into a stream reader.
                    StreamReader streamReader = new StreamReader(outputStream);
                    // Read the stream into a string.
                    String outputMessage = streamReader.ReadToEnd();
                    // Close the streams.
                    outputStream.Close();
                    streamReader.Close();
                    // Display to the console the Xml before and after
                    // encryption.
                    Console.WriteLine("Encoding the following message: "
 
                        + xmlDoc.get_InnerText());
                    Console.WriteLine("Message encoded: " + outputMessage);
                }
                catch (System.Exception ex) {
                    Console.WriteLine("Unexpected exception caught: " 
                        + ex.ToString());
                }
                break;
            }
            else {
                Object outputObject = xmlTransform.GetOutput();
            } 
        }
    } //EncryptXML

    // Create an XML document with Element and Text nodes.
    private static XmlDocument LoadXMLDoc()
    {
        XmlDocument xmlDoc = new XmlDocument();
        XmlNode mainNode = xmlDoc.CreateNode(XmlNodeType.Element, 
            "ContosoMessages", "http://www.contoso.com");
        XmlNode textNode = xmlDoc.CreateTextNode("Some text to encode.");
        mainNode.AppendChild(textNode);
        xmlDoc.AppendChild(mainNode);
        Console.WriteLine("Created the following XML Document for
 " 
            + "transformation: ");
        Console.WriteLine(xmlDoc.get_InnerXml());
        return xmlDoc;
    } //LoadXMLDoc

    // Resolve the specified base and relative Uri's .
    private static Uri ResolveUris(Uri baseUri,
 String relativeUri)
    {
        XmlUrlResolver xmlResolver = new XmlUrlResolver();
        xmlResolver.set_Credentials(System.Net.CredentialCache.
            get_DefaultCredentials());
        XmlDsigBase64Transform xmlTransform = new XmlDsigBase64Transform();
        xmlTransform.set_Resolver(xmlResolver);
        Uri absoluteUri = xmlResolver.ResolveUri(baseUri, relativeUri);

        if (absoluteUri != null) {
            Console.WriteLine("Resolved the base Uri and
 relative "
                + "Uri to the following:");
            Console.WriteLine(absoluteUri.ToString());
        }
        else {
            Console.WriteLine("Unable to resolve the base
 "
                + "Uri and relative Uri");
        }
        return absoluteUri;
    } //ResolveUris
} //Class1
//
// This sample produces the following output:
//
// Created the following XML Document for transformation:
// <ContosoMessages xmlns="http://www.contoso.com">Some
 text to encode.
// </ContosoMessages>
// Xml representation of the current transform:
// <Transform Algorithm="http://www.w3.org/2000/09/xmldsig#base64"
 xmlns=
// "http://www.w3.org/2000/09/xmldsig#" />
// Encoding the following message: Some text to encode.
// Message encoded: Jmr^
// Resolved the base Uri and relative Uri to the following:
// http://www.microsoft.com/msdn
// This sample completed successfully; press Enter to exit.

プラットフォーム

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0

参照

関連項目
SignedXml クラス
SignedXml メンバ
System.Security.Cryptography.Xml 名前空間