C# XmlDocument.WriteContentTo方法代码示例

        public static string PrettyPrint(string xml)
        {
            string Result = "";

            MemoryStream MS = new MemoryStream();
            XmlTextWriter W = new XmlTextWriter(MS, Encoding.Unicode);
            XmlDocument D = new XmlDocument();

            try {
                // Load the XmlDocument with the XML.
                D.LoadXml(XML);

                W.Formatting = Formatting.Indented;

                // Write the XML into a formatting XmlTextWriter
                D.WriteContentTo(W);
                W.Flush();
                MS.Flush();

                // Have to rewind the MemoryStream in order to read
                // its contents.
                MS.Position = 0;

                // Read MemoryStream contents into a StreamReader.
                StreamReader SR = new StreamReader(MS);

                // Extract the text from the StreamReader.
                string FormattedXML = SR.ReadToEnd();

                Result = FormattedXML;
            }
            catch (XmlException) {
            }

            MS.Close();
            W.Close();

            return Result;
        }

    private static string PrettyXml(string xml)
    {
        var result = string.Empty;

        var mStream = new MemoryStream();
        var writer = new XmlTextWriter(mStream, Encoding.Unicode);
        var document = new XmlDocument();

        try
        {
            // Load the XmlDocument with the XML.
            document.LoadXml(xml);

            writer.Formatting = Formatting.Indented;

            // Write the XML into a formatting XmlTextWriter
            document.WriteContentTo(writer);
            writer.Flush();
            mStream.Flush();

            // Have to rewind the MemoryStream in order to read
            // its contents.
            mStream.Position = 0;

            // Read MemoryStream contents into a StreamReader.
            var sReader = new StreamReader(mStream);

            // Extract the text from the StreamReader.
            result = sReader.ReadToEnd();
        }
        catch (XmlException)
        {
        }

        mStream.Close();
        writer.Close();

        return result;
    }

    //-------------------------------------------------------------------------------------------
    private string SignXML(string xml)
    {
        // Signing XML Documents: http://msdn.microsoft.com/en-us/library/ms229745.aspx

          var rsaKey = new RSACryptoServiceProvider();
          string sales_licensekeys_privatekey = ConfigurationManager.AppSettings["sales_licensekeys_privatekey"];
          if (!File.Exists(sales_licensekeys_privatekey))
               throw new Exception("The private signing key is missing");
          rsaKey.FromXmlString(System.IO.File.ReadAllText(sales_licensekeys_privatekey));

          XmlDocument doc = new XmlDocument();
          doc.PreserveWhitespace = true;
          doc.LoadXml(xml);

          SignedXml signedXml = new SignedXml(doc);
          signedXml.SigningKey = rsaKey;

          // Create a reference to be signed.
          Reference reference = new Reference();
          reference.Uri = ""; // set to "" to sign the entire doc

          XmlDsigEnvelopedSignatureTransform env = new XmlDsigEnvelopedSignatureTransform();
          reference.AddTransform(env);

          signedXml.AddReference(reference);
          signedXml.ComputeSignature();

          XmlElement xmlDigitalSignature = signedXml.GetXml();

          doc.DocumentElement.AppendChild(doc.ImportNode(xmlDigitalSignature, true));

          MemoryStream ms = new MemoryStream();
          XmlTextWriter writer = new XmlTextWriter(ms, new UTF8Encoding(false));
          writer = new XmlTextWriter(ms, new UTF8Encoding(false));
          //writer.Formatting = Formatting.Indented;

          doc.WriteContentTo(writer);
          writer.Flush();
          ms.Position = 0;
          StreamReader reader = new StreamReader(ms);
          return reader.ReadToEnd();
    }