C# XmlReader.ReadElementContentAsDate方法代码示例

 // Gets the creation date of the Project Gutenberg catalog. This method should be called
 // before parsing the books and volumes because the creation date is at the beginning;
 // calling it later would not find the XML element with the date any more and would
 // continue reading the content to the end, skipping all content. This method expects a
 // reader returned by the method Open.
 public Date GetCreated(XmlReader reader)
 {
     Log.Verbose("Getting creation date...");
     if (!reader.ReadToFollowing("Description", RDF))
         throw new ApplicationException("Missing creation time.");
     if (!reader.ReadToDescendant("value", RDF))
         throw new ApplicationException("Missing creation date value.");
     return reader.ReadElementContentAsDate();
 }

 // Parses a single book volume.
 Volume ParseVolume(XmlReader reader)
 {
     var volume = new Volume();
     var formats = new List<string>();
     while (reader.Read())
         if (reader.NodeType == XmlNodeType.Element)
             switch (reader.LocalName) {
             case "file":
                 volume.URL = ParseVolumeUrl(reader);
                 break;
             case "format":
                 if (!reader.ReadToDescendant("value", RDF))
                     throw new ApplicationException("Missing format value.");
                 formats.Add(reader.ReadElementContentAsString());
                 break;
             case "extent":
                 volume.Size = reader.ReadElementContentAsInt();
                 break;
             case "modified":
                 if (!reader.ReadToDescendant("value", RDF))
                     throw new ApplicationException("Missing modified date value.");
                 volume.Uploaded = reader.ReadElementContentAsDate();
                 break;
             case "isFormatOf":
                 volume.Number = int.Parse(reader.GetAttribute("resource", RDF).
                                             Substring(6), CultureInfo.InvariantCulture);
                 break;
             }
     volume.Formats = formats.Count > 0 ? formats.ToArray() : null;
     return volume;
 }

 // Parses a single book.
 Book ParseBook(XmlReader reader)
 {
     var book = new Book();
     while (reader.Read())
         if (reader.NodeType == XmlNodeType.Element) {
             string parseType;
             switch (reader.LocalName) {
             case "etext":
                 book.Number = int.Parse(reader.GetAttribute("ID", RDF).Substring(5),
                                             CultureInfo.InvariantCulture);
                 break;
             case "title":
                 parseType = reader.GetAttribute("parseType", RDF);
                 if (parseType != "Literal")
                     throw new ApplicationException("Unrecognized parse type.");
                 book.Title = reader.ReadElementContentAsString();
                 break;
             case "description":
                 book.Notes = ParseText(reader);
                 break;
             case "creator":
                 book.Authors = ParsePersonsAndEra(book, reader);
                 break;
             case "contributor":
                 // Eras of contributors do not affect the era of the book intentionally.
                 // Contributors might be not only illustrators, who would live at the
                 // same time as authors, but also people who retyped the book and
                 // uploaded it to the Project Gutenberg web site. They would mess the
                 // era of the book which is supposed to embrace the time when the actual
                 // paper book was written.
                 book.Contributors = ParsePersons(reader);
                 break;
             case "language":
                 if (!reader.ReadToDescendant("value", RDF))
                     throw new ApplicationException("Missing language value.");
                 book.Language = reader.ReadElementContentAsString();
                 break;
             case "subject":
                 using (var subreader = reader.ReadSubtree())
                     book.Tags = ParseTags(subreader).ToArray();
                 break;
             case "created":
                 if (!reader.ReadToDescendant("value", RDF))
                     throw new ApplicationException("Missing creation date value.");
                 book.Included = reader.ReadElementContentAsDate();
                 break;
             case "downloads":
                 if (!reader.ReadToDescendant("value", RDF))
                     throw new ApplicationException("Missing download count value.");
                 book.Downloads = reader.ReadElementContentAsInt();
                 break;
             }
         }
     return book;
 }