mcs/class/System.XML/System.Xml/XmlWriter.cs

   1 //
   2 // System.Xml.XmlWriter
   3 //
   4 // Authors:
   5 //   Kral Ferch <kral_ferch@hotmail.com>
   6 //   Atsushi Enomoto <ginga@kit.hi-ho.ne.jp>
   7 //
   8 // (C) 2002 Kral Ferch
   9 // (C) 2002-2003 Atsushi Enomoto
  10 // (C) 2004-2007 Novell, Inc.
  11 //
  12
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System;
  35 using System.Collections;
  36 using System.IO;
  37 using System.Text;
  38 #if NET_2_0 && (!NET_2_1 || MONOTOUCH)
  39 using System.Xml.XPath;
  40 #endif
  41
  42 namespace System.Xml
  43 {
  44 #if NET_2_0
  45         public abstract class XmlWriter : IDisposable
  46 #else
  47         public abstract class XmlWriter
  48 #endif
  49         {
  50 #if NET_2_0
  51                 XmlWriterSettings settings;
  52 #endif
  53
  54                 #region Constructors
  55
  56                 protected XmlWriter () { }
  57
  58                 #endregion
  59
  60                 #region Properties
  61
  62 #if NET_2_0
  63                 public virtual XmlWriterSettings Settings {
  64                         get {
  65                                 if (settings == null)
  66                                         settings = new XmlWriterSettings ();
  67                                 return settings;
  68                         }
  69                 }
  70 #endif
  71
  72                 public abstract WriteState WriteState { get; }
  73
  74
  75 #if NET_2_0
  76                 public virtual string XmlLang {
  77                         get { return null; }
  78                 }
  79
  80                 public virtual XmlSpace XmlSpace {
  81                         get { return XmlSpace.None; }
  82                 }
  83 #else
  84                 public abstract string XmlLang { get; }
  85
  86                 public abstract XmlSpace XmlSpace { get; }
  87 #endif
  88
  89                 #endregion
  90
  91                 #region Methods
  92
  93                 public abstract void Close ();
  94
  95 #if NET_2_0
  96                 public static XmlWriter Create (Stream stream)
  97                 {
  98                         return Create (stream, null);
  99                 }
 100
 101                 public static XmlWriter Create (string file)
 102                 {
 103                         return Create (file, null);
 104                 }
 105
 106                 public static XmlWriter Create (TextWriter writer)
 107                 {
 108                         return Create (writer, null);
 109                 }
 110
 111                 public static XmlWriter Create (XmlWriter writer)
 112                 {
 113                         return Create (writer, null);
 114                 }
 115
 116                 public static XmlWriter Create (StringBuilder builder)
 117                 {
 118                         return Create (builder, null);
 119                 }
 120
 121                 public static XmlWriter Create (Stream stream, XmlWriterSettings settings)
 122                 {
 123                         Encoding enc = settings != null ? settings.Encoding : Encoding.UTF8;
 124                         return Create (new StreamWriter (stream, enc), settings);
 125                 }
 126
 127                 public static XmlWriter Create (string file, XmlWriterSettings settings)
 128                 {
 129                         Encoding enc = settings != null ? settings.Encoding : Encoding.UTF8;
 130                         return CreateTextWriter (new StreamWriter (file, false, enc), settings, true);
 131                 }
 132
 133                 public static XmlWriter Create (StringBuilder builder, XmlWriterSettings settings)
 134                 {
 135                         return Create (new StringWriter (builder), settings);
 136                 }
 137
 138                 public static XmlWriter Create (TextWriter writer, XmlWriterSettings settings)
 139                 {
 140                         if (settings == null)
 141                                 settings = new XmlWriterSettings ();
 142                         return CreateTextWriter (writer, settings, settings.CloseOutput);
 143                 }
 144
 145                 public static XmlWriter Create (XmlWriter writer, XmlWriterSettings settings)
 146                 {
 147                         if (settings == null)
 148                                 settings = new XmlWriterSettings ();
 149                         writer.settings = settings;
 150                         return writer;
 151                 }
 152
 153                 private static XmlWriter CreateTextWriter (TextWriter writer, XmlWriterSettings settings, bool closeOutput)
 154                 {
 155                         if (settings == null)
 156                                 settings = new XmlWriterSettings ();
 157                         XmlTextWriter xtw = new XmlTextWriter (writer, settings, closeOutput);
 158                         return Create (xtw, settings);
 159                 }
 160
 161                 protected virtual void Dispose (bool disposing)
 162                 {
 163                         Close ();
 164                 }
 165
 166                 void IDisposable.Dispose ()
 167                 {
 168                         Dispose (false);
 169                 }
 170 #endif
 171
 172                 public abstract void Flush ();
 173
 174                 public abstract string LookupPrefix (string ns);
 175
 176                 private void WriteAttribute (XmlReader reader, bool defattr)
 177                 {
 178                         if (!defattr && reader.IsDefault)
 179                                 return;
 180
 181                         WriteStartAttribute (reader.Prefix, reader.LocalName, reader.NamespaceURI);
 182 #if NET_2_1 && !MONOTOUCH
 183                         // no ReadAttributeValue() in 2.1 profile.
 184                         WriteString (reader.Value);
 185 #else
 186                         while (reader.ReadAttributeValue ()) {
 187                                 switch (reader.NodeType) {
 188                                 case XmlNodeType.Text:
 189                                         WriteString (reader.Value);
 190                                         break;
 191                                 case XmlNodeType.EntityReference:
 192                                         WriteEntityRef (reader.Name);
 193                                         break;
 194                                 }
 195                         }
 196 #endif
 197                         WriteEndAttribute ();
 198                 }
 199
 200                 public virtual void WriteAttributes (XmlReader reader, bool defattr)
 201                 {
 202                         if(reader == null)
 203                                 throw new ArgumentException("null XmlReader specified.", "reader");
 204
 205                         switch (reader.NodeType) {
 206                         case XmlNodeType.XmlDeclaration:
 207                                 WriteAttributeString ("version", reader ["version"]);
 208                                 if (reader ["encoding"] != null)
 209                                         WriteAttributeString ("encoding", reader ["encoding"]);
 210                                 if (reader ["standalone"] != null)
 211                                         WriteAttributeString ("standalone", reader ["standalone"]);
 212                                 break;
 213                         case XmlNodeType.Element:
 214                                 if (reader.MoveToFirstAttribute ())
 215                                         goto case XmlNodeType.Attribute;
 216                                 break;
 217                         case XmlNodeType.Attribute:
 218                                 do {
 219                                         WriteAttribute (reader, defattr);
 220                                 } while (reader.MoveToNextAttribute ());
 221                                 reader.MoveToElement ();
 222                                 break;
 223                         default:
 224                                 throw new XmlException("NodeType is not one of Element, Attribute, nor XmlDeclaration.");
 225                         }
 226                 }
 227
 228                 public void WriteAttributeString (string localName, string value)
 229                 {
 230                         WriteAttributeString ("", localName, null, value);
 231                 }
 232
 233                 public void WriteAttributeString (string localName, string ns, string value)
 234                 {
 235                         WriteAttributeString ("", localName, ns, value);
 236                 }
 237
 238                 public void WriteAttributeString (string prefix, string localName, string ns, string value)
 239                 {
 240                         // In MS.NET (1.0), this check is done *here*, not at WriteStartAttribute.
 241                         // (XmlTextWriter.WriteStartAttribute("xmlns", "anyname", null) throws an exception.
 242
 243                         WriteStartAttribute (prefix, localName, ns);
 244                         if (value != null && value.Length > 0)
 245                                 WriteString (value);
 246                         WriteEndAttribute ();
 247                 }
 248
 249                 public abstract void WriteBase64 (byte[] buffer, int index, int count);
 250
 251 #if NET_2_0
 252                 public virtual void WriteBinHex (byte [] buffer, int index, int count)
 253                 {
 254                         StringWriter sw = new StringWriter ();
 255                         XmlConvert.WriteBinHex (buffer, index, count, sw);
 256                         WriteString (sw.ToString ());
 257                 }
 258 #else
 259                 public abstract void WriteBinHex (byte[] buffer, int index, int count);
 260 #endif
 261
 262                 public abstract void WriteCData (string text);
 263
 264                 public abstract void WriteCharEntity (char ch);
 265
 266                 public abstract void WriteChars (char[] buffer, int index, int count);
 267
 268                 public abstract void WriteComment (string text);
 269
 270                 public abstract void WriteDocType (string name, string pubid, string sysid, string subset);
 271
 272                 public void WriteElementString (string localName, string value)
 273                 {
 274                         WriteStartElement(localName);
 275                         if (value != null && value.Length > 0)
 276                                 WriteString(value);
 277                         WriteEndElement();
 278                 }
 279
 280                 public void WriteElementString (string localName, string ns, string value)
 281                 {
 282                         WriteStartElement(localName, ns);
 283                         if (value != null && value.Length > 0)
 284                                 WriteString(value);
 285                         WriteEndElement();
 286                 }
 287
 288 #if NET_2_0
 289                 public void WriteElementString (string prefix, string localName, string ns, string value)
 290                 {
 291                         WriteStartElement(prefix, localName, ns);
 292                         if (value != null && value.Length > 0)
 293                                 WriteString(value);
 294                         WriteEndElement();
 295                 }
 296 #endif
 297
 298                 public abstract void WriteEndAttribute ();
 299
 300                 public abstract void WriteEndDocument ();
 301
 302                 public abstract void WriteEndElement ();
 303
 304                 public abstract void WriteEntityRef (string name);
 305
 306                 public abstract void WriteFullEndElement ();
 307
 308 #if NET_2_0
 309                 public virtual void WriteName (string name)
 310                 {
 311                         WriteNameInternal (name);
 312                 }
 313
 314                 public virtual void WriteNmToken (string name)
 315                 {
 316                         WriteNmTokenInternal (name);
 317                 }
 318
 319                 public virtual void WriteQualifiedName (string localName, string ns)
 320                 {
 321                         WriteQualifiedNameInternal (localName, ns);
 322                 }
 323 #else
 324                 public abstract void WriteName (string name);
 325
 326                 public abstract void WriteNmToken (string name);
 327
 328                 public abstract void WriteQualifiedName (string localName, string ns);
 329 #endif
 330
 331                 internal void WriteNameInternal (string name)
 332                 {
 333 #if NET_2_0
 334                         switch (Settings.ConformanceLevel) {
 335                         case ConformanceLevel.Document:
 336                         case ConformanceLevel.Fragment:
 337                                 XmlConvert.VerifyName (name);
 338                                 break;
 339                         }
 340 #else
 341                         XmlConvert.VerifyName (name);
 342 #endif
 343                         WriteString (name);
 344                 }
 345
 346                 internal virtual void WriteNmTokenInternal (string name)
 347                 {
 348                         bool valid = true;
 349 #if NET_2_0
 350                         switch (Settings.ConformanceLevel) {
 351                         case ConformanceLevel.Document:
 352                         case ConformanceLevel.Fragment:
 353                                 valid = XmlChar.IsNmToken (name);
 354                                         break;
 355                         }
 356 #else
 357                         valid = XmlChar.IsNmToken (name);
 358 #endif
 359                         if (!valid)
 360                                 throw new ArgumentException ("Argument name is not a valid NMTOKEN.");
 361                         WriteString (name);
 362                 }
 363
 364                 internal void WriteQualifiedNameInternal (string localName, string ns)
 365                 {
 366                         if (localName == null || localName == String.Empty)
 367                                 throw new ArgumentException ();
 368                         if (ns == null)
 369                                 ns = String.Empty;
 370
 371 #if NET_2_0
 372                         switch (Settings.ConformanceLevel) {
 373                         case ConformanceLevel.Document:
 374                         case ConformanceLevel.Fragment:
 375                                 XmlConvert.VerifyNCName (localName);
 376                                 break;
 377                         }
 378 #else
 379                         XmlConvert.VerifyNCName (localName);
 380 #endif
 381
 382                         string prefix = ns.Length > 0 ? LookupPrefix (ns) : String.Empty;
 383                         if (prefix == null)
 384                                 throw new ArgumentException (String.Format ("Namespace '{0}' is not declared.", ns));
 385
 386                         if (prefix != String.Empty) {
 387                                 WriteString (prefix);
 388                                 WriteString (":");
 389                                 WriteString (localName);
 390                         }
 391                         else
 392                                 WriteString (localName);
 393                 }
 394
 395 #if NET_2_0 && (!NET_2_1 || MONOTOUCH)
 396                 public virtual void WriteNode (XPathNavigator navigator, bool defattr)
 397                 {
 398                         if (navigator == null)
 399                                 throw new ArgumentNullException ("navigator");
 400                         switch (navigator.NodeType) {
 401                         case XPathNodeType.Attribute:
 402                                 // no operation
 403                                 break;
 404                         case XPathNodeType.Namespace:
 405                                 // no operation
 406                                 break;
 407                         case XPathNodeType.Text:
 408                                 WriteString (navigator.Value);
 409                                 break;
 410                         case XPathNodeType.SignificantWhitespace:
 411                                 WriteWhitespace (navigator.Value);
 412                                 break;
 413                         case XPathNodeType.Whitespace:
 414                                 WriteWhitespace (navigator.Value);
 415                                 break;
 416                         case XPathNodeType.Comment:
 417                                 WriteComment (navigator.Value);
 418                                 break;
 419                         case XPathNodeType.ProcessingInstruction:
 420                                 WriteProcessingInstruction (navigator.Name, navigator.Value);
 421                                 break;
 422                         case XPathNodeType.Root:
 423                                 if (navigator.MoveToFirstChild ()) {
 424                                         do {
 425                                                 WriteNode (navigator, defattr);
 426                                         } while (navigator.MoveToNext ());
 427                                         navigator.MoveToParent ();
 428                                 }
 429                                 break;
 430                         case XPathNodeType.Element:
 431                                 WriteStartElement (navigator.Prefix, navigator.LocalName, navigator.NamespaceURI);
 432                                 if (navigator.MoveToFirstNamespace (XPathNamespaceScope.Local)) {
 433                                         do {
 434                                                 if (defattr || navigator.SchemaInfo == null || navigator.SchemaInfo.IsDefault)
 435                                                         WriteAttributeString (navigator.Prefix,
 436                                                                 navigator.LocalName == String.Empty ? "xmlns" : navigator.LocalName,
 437                                                                 "http://www.w3.org/2000/xmlns/",
 438                                                                 navigator.Value);
 439                                         } while (navigator.MoveToNextNamespace (XPathNamespaceScope.Local));
 440                                         navigator.MoveToParent ();
 441                                 }
 442                                 if (navigator.MoveToFirstAttribute ()) {
 443                                         do {
 444                                                 if (defattr || navigator.SchemaInfo == null || navigator.SchemaInfo.IsDefault)
 445                                                         WriteAttributeString (navigator.Prefix, navigator.LocalName, navigator.NamespaceURI, navigator.Value);
 446
 447                                         } while (navigator.MoveToNextAttribute ());
 448                                         navigator.MoveToParent ();
 449                                 }
 450                                 if (navigator.MoveToFirstChild ()) {
 451                                         do {
 452                                                 WriteNode (navigator, defattr);
 453                                         } while (navigator.MoveToNext ());
 454                                         navigator.MoveToParent ();
 455                                 }
 456                                 if (navigator.IsEmptyElement)
 457                                         WriteEndElement ();
 458                                 else
 459                                         WriteFullEndElement ();
 460                                 break;
 461                         default:
 462                                 throw new NotSupportedException ();
 463                         }
 464                 }
 465 #endif
 466
 467                 public virtual void WriteNode (XmlReader reader, bool defattr)
 468                 {
 469                         if (reader == null)
 470                                 throw new ArgumentException ();
 471
 472                         if (reader.ReadState == ReadState.Initial) {
 473                                 reader.Read ();
 474                                 do {
 475                                         WriteNode (reader, defattr);
 476                                 } while (!reader.EOF);
 477                                 return;
 478                         }
 479
 480                         switch (reader.NodeType) {
 481                         case XmlNodeType.Element:
 482                                 WriteStartElement (reader.Prefix, reader.LocalName, reader.NamespaceURI);
 483 #if false
 484                                 WriteAttributes (reader, defattr);
 485                                 reader.MoveToElement ();
 486 #else
 487                                 // Well, I found that MS.NET took this way, since
 488                                 // there was a error-prone SgmlReader that fails
 489                                 // MoveToNextAttribute().
 490                                 if (reader.HasAttributes) {
 491                                         for (int i = 0; i < reader.AttributeCount; i++) {
 492                                                 reader.MoveToAttribute (i);
 493                                                 WriteAttribute (reader, defattr);
 494                                         }
 495                                         reader.MoveToElement ();
 496                                 }
 497 #endif
 498                                 if (reader.IsEmptyElement)
 499                                         WriteEndElement ();
 500                                 else {
 501                                         int depth = reader.Depth;
 502                                         reader.Read ();
 503                                         if (reader.NodeType != XmlNodeType.EndElement) {
 504                                                 do {
 505                                                         WriteNode (reader, defattr);
 506                                                 } while (depth < reader.Depth);
 507                                         }
 508                                         WriteFullEndElement ();
 509                                 }
 510                                 break;
 511                         // In case of XmlAttribute, don't proceed reader, and it will never be written.
 512                         case XmlNodeType.Attribute:
 513                                 return;
 514                         case XmlNodeType.Text:
 515                                 WriteString (reader.Value);
 516                                 break;
 517                         case XmlNodeType.CDATA:
 518                                 WriteCData (reader.Value);
 519                                 break;
 520                         case XmlNodeType.EntityReference:
 521                                 WriteEntityRef (reader.Name);
 522                                 break;
 523                         case XmlNodeType.XmlDeclaration:
 524                                 // LAMESPEC: It means that XmlWriter implementation _must not_ check
 525                                 // whether PI name is "xml" (it is XML error) or not.
 526                         case XmlNodeType.ProcessingInstruction:
 527                                 WriteProcessingInstruction (reader.Name, reader.Value);
 528                                 break;
 529                         case XmlNodeType.Comment:
 530                                 WriteComment (reader.Value);
 531                                 break;
 532                         case XmlNodeType.DocumentType:
 533                                 WriteDocType (reader.Name,
 534                                         reader ["PUBLIC"], reader ["SYSTEM"], reader.Value);
 535                                 break;
 536                         case XmlNodeType.SignificantWhitespace:
 537                                 goto case XmlNodeType.Whitespace;
 538                         case XmlNodeType.Whitespace:
 539                                 WriteWhitespace (reader.Value);
 540                                 break;
 541                         case XmlNodeType.EndElement:
 542                                 WriteFullEndElement ();
 543                                 break;
 544                         case XmlNodeType.EndEntity:
 545                                 break;
 546                         case XmlNodeType.None:
 547                                 break;  // Do nothing, nor reporting errors.
 548                         default:
 549                                 throw new XmlException ("Unexpected node " + reader.Name + " of type " + reader.NodeType);
 550                         }
 551                         reader.Read ();
 552                 }
 553
 554                 public abstract void WriteProcessingInstruction (string name, string text);
 555
 556                 public abstract void WriteRaw (string data);
 557
 558                 public abstract void WriteRaw (char[] buffer, int index, int count);
 559
 560 #if NET_2_0
 561                 public void WriteStartAttribute (string localName)
 562                 {
 563                         WriteStartAttribute (null, localName, null);
 564                 }
 565 #endif
 566
 567                 public void WriteStartAttribute (string localName, string ns)
 568                 {
 569                         WriteStartAttribute (null, localName, ns);
 570                 }
 571
 572                 public abstract void WriteStartAttribute (string prefix, string localName, string ns);
 573
 574                 public abstract void WriteStartDocument ();
 575
 576                 public abstract void WriteStartDocument (bool standalone);
 577
 578                 public void WriteStartElement (string localName)
 579                 {
 580                         WriteStartElement (null, localName, null);
 581                 }
 582
 583                 public void WriteStartElement (string localName, string ns)
 584                 {
 585                         WriteStartElement (null, localName, ns);
 586                 }
 587
 588                 public abstract void WriteStartElement (string prefix, string localName, string ns);
 589
 590                 public abstract void WriteString (string text);
 591
 592                 public abstract void WriteSurrogateCharEntity (char lowChar, char highChar);
 593
 594                 public abstract void WriteWhitespace (string ws);
 595
 596 #if NET_2_0
 597                 public virtual void WriteValue (bool value)
 598                 {
 599                         WriteString (XQueryConvert.BooleanToString (value));
 600                 }
 601
 602                 public virtual void WriteValue (DateTime value)
 603                 {
 604                         WriteString (XmlConvert.ToString (value));
 605                 }
 606
 607                 public virtual void WriteValue (decimal value)
 608                 {
 609                         WriteString (XQueryConvert.DecimalToString (value));
 610                 }
 611
 612                 public virtual void WriteValue (double value)
 613                 {
 614                         WriteString (XQueryConvert.DoubleToString (value));
 615                 }
 616
 617                 public virtual void WriteValue (int value)
 618                 {
 619                         WriteString (XQueryConvert.IntToString (value));
 620                 }
 621
 622                 public virtual void WriteValue (long value)
 623                 {
 624                         WriteString (XQueryConvert.IntegerToString (value));
 625                 }
 626
 627                 public virtual void WriteValue (object value)
 628                 {
 629                         if (value == null)
 630                                 throw new ArgumentNullException ("value");
 631
 632                         if (value is string)
 633                                 WriteString ((string) value);
 634                         else if (value is bool)
 635                                 WriteValue ((bool) value);
 636                         else if (value is byte)
 637                                 WriteValue ((int) value);
 638                         else if (value is byte [])
 639                                 WriteBase64 ((byte []) value, 0, ((byte []) value).Length);
 640                         else if (value is char [])
 641                                 WriteChars ((char []) value, 0, ((char []) value).Length);
 642                         else if (value is DateTime)
 643                                 WriteValue ((DateTime) value);
 644                         else if (value is decimal)
 645                                 WriteValue ((decimal) value);
 646                         else if (value is double)
 647                                 WriteValue ((double) value);
 648                         else if (value is short)
 649                                 WriteValue ((int) value);
 650                         else if (value is int)
 651                                 WriteValue ((int) value);
 652                         else if (value is long)
 653                                 WriteValue ((long) value);
 654                         else if (value is float)
 655                                 WriteValue ((float) value);
 656                         else if (value is TimeSpan) // undocumented
 657                                 WriteString (XmlConvert.ToString ((TimeSpan) value));
 658                         else if (value is XmlQualifiedName) {
 659                                 XmlQualifiedName qname = (XmlQualifiedName) value;
 660                                 if (!qname.Equals (XmlQualifiedName.Empty)) {
 661                                         if (qname.Namespace.Length > 0 && LookupPrefix (qname.Namespace) == null)
 662                                                 throw new InvalidCastException (String.Format ("The QName '{0}' cannot be written. No corresponding prefix is declared", qname));
 663                                         WriteQualifiedName (qname.Name, qname.Namespace);
 664                                 }
 665                                 else
 666                                         WriteString (String.Empty);
 667                         }
 668                         else if (value is IEnumerable) {
 669                                 bool follow = false;
 670                                 foreach (object obj in (IEnumerable) value) {
 671                                         if (follow)
 672                                                 WriteString (" ");
 673                                         else
 674                                                 follow = true;
 675                                         WriteValue (obj);
 676                                 }
 677                         }
 678                         else
 679                                 throw new InvalidCastException (String.Format ("Type '{0}' cannot be cast to string", value.GetType ()));
 680                 }
 681
 682                 public virtual void WriteValue (float value)
 683                 {
 684                         WriteString (XQueryConvert.FloatToString (value));
 685                 }
 686
 687                 public virtual void WriteValue (string value)
 688                 {
 689                         WriteString (value);
 690                 }
 691 #endif
 692
 693                 #endregion
 694         }
 695 }