C# XmlDsigEnvelopedSignatureTransform构造函数代码示例

// Sign an XML file and save the signature in a new file.
public static void SignXmlFile(string FileName, string SignedFileName, RSA Key)
{
    // Create a new XML document.
    XmlDocument doc = new XmlDocument();

    // Format the document to ignore white spaces.
    doc.PreserveWhitespace = false;

    // Load the passed XML file using it's name.
    doc.Load(new XmlTextReader(FileName));

    // Create a SignedXml object.
    SignedXml signedXml = new SignedXml(doc);

    // Add the key to the SignedXml document. 
    signedXml.SigningKey = Key;

    // Create a reference to be signed.
    Reference reference = new Reference();
    reference.Uri = "";

    // Add an enveloped transformation to the reference.
    XmlDsigEnvelopedSignatureTransform env = new XmlDsigEnvelopedSignatureTransform();
    reference.AddTransform(env);

    // Add the reference to the SignedXml object.
    signedXml.AddReference(reference);

    // Add an RSAKeyValue KeyInfo (optional; helps recipient find key to validate).
    KeyInfo keyInfo = new KeyInfo();
    keyInfo.AddClause(new RSAKeyValue((RSA)Key));
    signedXml.KeyInfo = keyInfo;

    // Compute the signature.
    signedXml.ComputeSignature();

    // Get the XML representation of the signature and save
    // it to an XmlElement object.
    XmlElement xmlDigitalSignature = signedXml.GetXml();

    // Append the element to the XML document.
    doc.DocumentElement.AppendChild(doc.ImportNode(xmlDigitalSignature, true));

    if (doc.FirstChild is XmlDeclaration)  
    {
        doc.RemoveChild(doc.FirstChild);
    }

    // Save the signed XML document to a file specified
    // using the passed string.
    XmlTextWriter xmltw = new XmlTextWriter(SignedFileName, new UTF8Encoding(false));
    doc.WriteTo(xmltw);
    xmltw.Close();
}

bool IncludeComments = true;
// This transform is created for demonstration purposes.
XmlDsigEnvelopedSignatureTransform secondTransform =
    new XmlDsigEnvelopedSignatureTransform(IncludeComments);