html中的表格一般都存储着比较重要的信息，虽然现在css+div已是主流，但笔者还是不建议把信息添加到div中，过度的使用div标签一样是一场灾难^_^。下面的代码可以解析html table，感兴趣的朋友可以看看。

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usingSystem.Collections.Generic; usingSystem.Xml; usingSystem.Text; usingSgml; usingSystem.IO; usingSystem.Netpdf; usingSystem.ComponentModel;    namespaceFreemouse.Base.parser {     /// <summary>     /// html table 解析器     /// </summary>     publicclassHTMLTableReaderpdf : IDisposable     {         privateList<HTMLTable> table;         privateXmlDocument doc;         privateEncoding objEncoding;         privateSgmlReader reader;         privatebyte[] htmlBytes;            privatebooldisposed = false;         privateComponent component = newComponent();            /// <summary>         /// 文本的编码格式        /// </summary>         publicEncoding Encode         {             get{ returnobjEncoding; }             set{ objEncoding = value; }         }         /// <summary>         /// 文档中的表格 pdfv        /// </summary>         publicList<HTMLTable> Tables         {             get{ returntable; }         }         /// <summary>         /// 提供文档中表格的索引访问pdfv         /// </summary>         /// <param name="index">index</param>         /// <returns>HTMLTable</returns>         publicHTMLTable this[intindex]         {             get{                 try                {                     returntable[index];                 }                 catch(Exception e)                 {                     throwe;                 }             }         }         /// <summary>         /// 提供文档中表格的索引访问         /// </summary>         /// <param name="index">table index</param>         /// <param name="subindex">tr index</param>         /// <returns>HTMLTr</returns>         publicHTMLTr this[intindex, intsubindex]         {             get            {                 try                {                     returntable[index].Rows[subindex];                 }                 catch(Exception e)                 {                     throwe;                 }             }         }         /// <summary>         /// 提供文档中表格的索引访问         /// </summary>         /// <param name="index">table index</param>         /// <param name="subindex">tr index</param>         /// <param name="subindex">td index</param>         /// <returns>HTMLTd</returns>         publicHTMLTd this[intindex, intsubindex, intssubindex]         {             get            {                 try                {                     returntable[index].Rows[subindex].Cells[ssubindex];                 }                 catch(Exception e)                 {                     throwe;                 }             }         }            privateStream outStream;         /// <summary>         /// 提供格式化后的标准html文档流，以供保存         /// </summary>         publicStream OutputStream         {             get{ returnoutStream; }             set{ outStream = value; }         }         /// <summary>         /// 构造函数         /// </summary>         publicHTMLTableReader()         {             doc = newXmlDocument();             table = newList<HTMLTable>();             reader = newSgmlReader();             reader.DocType = "strict";             objEncoding = Encoding.Default;             outStream = newMemoryStream();         }         /// <summary>         /// 析构函数         /// </summary>         ~HTMLTableReader()         {             try            {                 if(reader != null)                 {                     reader.Close();                 }                 if(outStream != null)                 {                     outStream.Close();                 }             }             catch(Exception e)             {                 throwe;             }         }         /// <summary>         /// 释放所有资源         /// </summary>         publicvoidDispose()         {             Dispose(true);             GC.SuppressFinalize(this);         }            privatevoidDispose(booldisposing)         {             if(!this.disposed)             {                 if(disposing)                 {                     component.Dispose();                 }                 disposed = true;                }         }            /// <summary>         /// 从文件或URL中获取加载dom         /// </summary>         /// <param name="filename">文件名或URL</param>         /// <param name="encoding">编码</param>         publicvoidLoad(stringfilename,Encoding encoding)         {             Stream readstream = newMemoryStream();             if(Uri.IsWellFormedUriString(filename, UriKind.Absolute))             {                 using(WebClient web = newWebClient())                 {                     try                    {                         web.Encoding = encoding;                         readstream = web.OpenRead(filename);                         Load(readstream, encoding);                     }                     catch(Exception e)                     {                         throwe;                     }                     finally                    {                         readstream.Close();                         web.Dispose();                     }                 }             }             elseif(File.Exists(filename))             {                 using(FileStream fs = newFileStream(filename, FileMode.Open, FileAccess.Read))                 {                     try                    {                         Load(fs, encoding);                     }                     catch(Exception e)                     {                         throwe;                     }                     finally                    {                         fs.Close();                     }                 }             }             else            {                 thrownewException("试图访问不存在的文件");             }         }         /// <summary>         /// 从流设备中加载dom         /// </summary>         /// <param name="stream">流</param>         /// <param name="encode">编码</param>         publicvoidLoad(Stream stream,Encoding encode)         {             using( StreamWriter output = newStreamWriter(outStream, encode) ){                 using(XmlTextWriter writer = newXmlTextWriter(outStream, encode))                 {                     try                    {                         reader.InputStream = newStreamReader(stream, encode);                         reader.WhitespaceHandling = WhitespaceHandling.None;                         writer.Formatting = Formatting.Indented;                         writer.WriteStartDocument();                         //设置一个根节点                         writer.WriteStartElement("root");                         while(reader.Read())                         {                             //获取html节点                             if(reader.NodeType == XmlNodeType.Element && reader.Name == "html")                             {                                 XmlReader r = reader.ReadSubtree();                             }                             else                            {                                 if(reader.Name == null)                                 {                                     continue;                                 }                                 //写入所有table节点                                 switch(reader.Name.ToLower())                                 {                                     case"table":                                         if(reader.NodeType == XmlNodeType.Element)                                         writer.WriteNode(reader, true);                                         break;                                     case"":                                     default:                                         continue;                                 }                             }                            }                         writer.WriteEndElement();                         writer.WriteEndDocument();                         writer.Flush();                         writer.Close();                         htmlBytes = ((MemoryStream)outStream).GetBuffer();                         //编码转换                         if(objEncoding != encode)                         {                             htmlBytes = Encoding.Convert(encode, objEncoding, htmlBytes, 0, htmlBytes.Length);                         }                         stringxmltext = ReplaceLowOrderASCIICharacters(htmlBytes);                         doc.LoadXml(xmltext);                         getTable();                        }                     catch(Exception e)                     {                         throwe;                     }                     finally                    {                         writer.Close();                         output.Close();                     }                 }             }         }         /// <summary>         /// 从字符串中加载dom         /// </summary>         /// <param name="xmltext">文本</param>         /// <param name="encode">编码</param>         publicvoidLoadXml(stringxmltext,Encoding encode)         {             try            {                 MemoryStream inputStream = newMemoryStream(encode.GetBytes(xmltext));                 Load(inputStream, encode);             }             catch(Exception e)             {                 throwe;             }         }         /// <summary>         /// 查找table         /// </summary>         privatevoidgetTable()         {             XmlNodeList tablelist = doc.GetElementsByTagName("table");             foreach(XmlNode _table intablelist)             {                 table.Add( newHTMLTable( _table));             }         }         /// <summary>         /// 修复xml低位字符串无法解析的问题         /// </summary>         /// <param name="buffer"></param>         /// <returns></returns>         privatestringReplaceLowOrderASCIICharacters(byte[] buffer)         {             stringtmp = objEncoding.GetString(buffer);             StringBuilder info = newStringBuilder();             foreach(charcc intmp)             {                 intss = (int)cc;                 if(((ss >= 0) && (ss <= 8)) || ((ss >= 11) && (ss <= 12)) || ((ss >= 14) && (ss <= 32)))                     info.AppendFormat(" ", ss);//&#x{0:X};                 elseinfo.Append(cc);             }             returninfo.ToString();         }     }     /// <summary>     /// 代表一个html表格     /// </summary>     publicclassHTMLTable : HTMLTag     {         privateList<HTMLTr> tr;         /// <summary>         /// 代表表格中的行，tr         /// </summary>         publicList<HTMLTr> Rows{             get{ returntr; }         }         /// <summary>         /// 构造函数         /// </summary>         /// <param name="node">xmlnode</param>         publicHTMLTable(XmlNode node) :base(node)         {             tr = newList<HTMLTr>();             getSubElement(node, Tag.tr);             getDeep = false;             foreach(XmlNode snode insubnodelist)             {                 tr.Add(newHTMLTr(snode));             }         }     }     /// <summary>     /// 代表一个table中的行     /// </summary>     publicclassHTMLTr : HTMLTag{            privateList<HTMLTd> td;         /// <summary>         /// 代表行中的单元格，td         /// </summary>         publicList<HTMLTd> Cells{             get{ returntd; }         }         /// <summary>         /// 构造函数         /// </summary>         /// <param name="node">xmlnode</param>         publicHTMLTr(XmlNode node): base(node)         {             td = newList<HTMLTd>();             getSubElement(node, Tag.td);             getDeep = false;             foreach(XmlNode snode insubnodelist)             {                 td.Add(newHTMLTd(snode));             }         }        }     /// <summary>     /// 代表一个table中的单元格     /// </summary>     publicclassHTMLTd : HTMLTag{         publicHTMLTd(XmlNode node):base(node)         {         }     }     /// <summary>     /// 代表一个html标签节点     /// </summary>     publicclassHTMLTag : IDisposable     {         protectedXmlNode node;         protectedboolgetDeep = true;         protectedList<XmlNode> subnodelist;         /// <summary>         /// 标签中的文字         /// </summary>         publicstringValue         {             get            {                 try                {                     returnnode.InnerText;                 }                 catch(Exception)                 {                     return"";                 }             }         }         /// <summary>         /// 标签中的html文本         /// </summary>         publicstringinnerHTML         {             get            {                 try                {                     returnnode.InnerXml;                 }                 catch(Exception)                 {                     return"";                 }             }         }         /// <summary>         /// 属性索引器         /// </summary>         /// <param name="attribute">指定属性名</param>         /// <returns>属性值</returns>         publicstringthis[stringattribute]         {             get            {                 try                {                     returnnode.Attributes[attribute].Value;                 }                 catch(Exception)                 {                     return"";                 }             }         }         /// <summary>         /// 查找指定标签名的子节点         /// </summary>         /// <param name="tagname">标签名</param>         /// <returns>List<HTMLTag></returns>         publicvirtualList<HTMLTag> this[Tag tagname]         {             get            {                 try                {                     getSubElement(node, tagname);                     List<HTMLTag> tags = newList<HTMLTag>();                     foreach(XmlNode _node insubnodelist)                     {                         tags.Add(newHTMLTag(_node));                     }                     returntags;                 }                 catch(Exception)                 {                     returnnewList<HTMLTag>();                 }             }         }         /// <summary>         /// 根据tagname查找元素         /// </summary>         /// <param name="tagname">标签名</param>         /// <returns>List<HTMLTag></returns>         publicvirtualList<HTMLTag> GetElementsByTagName(Tag tagname)         {             returnthis[tagname];         }            privateXmlNode nodecopy;         /// <summary>         /// 根据id查找元素         /// </summary>         /// <param name="id">id</param>         /// <returns>HTMLTag</returns>         publicvirtualHTMLTag GetElementByID(stringid)         {             HTMLTag ht = newHTMLTag(nodecopy);             foreach(XmlNode subnode innodecopy.ChildNodes)             {                 try                {                     stringnodeid = subnode.Attributes["id"].Value;                     {                         if(nodeid.ToLower() == id.ToLower())                         {                             nodecopy = node;                             returnnewHTMLTag(subnode);                         }                         else                        {                             nodecopy = subnode;                             returnGetElementByID(id);                         }                     }                 }                 catch(Exception)                 {                     continue;                 }             }             returnht;         }         /// <summary>         /// 构造函数         /// </summary>         /// <param name="node">节点</param>         publicHTMLTag(XmlNode node)         {             this.node = node;             this.nodecopy = node;             subnodelist = newList<XmlNode>();         }         /// <summary>         /// 查找子结点         /// </summary>         /// <param name="parentnode">父节点</param>         /// <param name="tagname">标签名</param>         protectedvoidgetSubElement(XmlNode parentnode,Tag tagname)         {                foreach(XmlNode subnode inparentnode.ChildNodes)             {                 if(subnode.Name == tagname.ToString())                 {                     subnodelist.Add(subnode);                 }                 if(getDeep && subnode.HasChildNodes)                 {                     getSubElement(subnode,tagname);                 }             }         }            privatebooldisposed = false;         privateComponent component = newComponent();            /// <summary>         /// 释放所有资源         /// </summary>         publicvoidDispose()         {             Dispose(true);             GC.SuppressFinalize(this);         }            privatevoidDispose(booldisposing)         {             if(!this.disposed)             {                 if(disposing)                 {                     component.Dispose();                 }                 disposed = true;                }         }        }     /// <summary>     /// html标签名枚举     /// </summary>     publicenumTag     {             a,             abbr,             acronym,             address,             applet,             area,             b,             Base,             basefont,             bdo,             big,             blockquote,             body,             br,             button,             caption,             center,             cite,             code,             col,             colgroup,             dd,             del,             dfn,             dir,             div,             dl,             dt,             em,             fieldset,             font,             form,             frame,             frameset,             h1,             h2,             h3,             h4,             h5,             h6,             head,             hr,             html,             i,             iframe,             img,             input,             ins,             isindex,             kbd,             label,             legend,             li,             link,             listing,             map,             menu,             meta,             noframes,             noscript,             Object,             ol,             optgroup,             option,             p,             param,             plaintext,             pre,             q,             rb,             rbc,             rp,             rt,             rtc,             ruby,             s,             samp,             script,             select,             small,             span,             strike,             strong,             style,             sub,             sup,             table,             tbody,             td,             textarea,             tfoot,             th,             thead,             title,             tr,             tt,             u,             ul,             var,             xmp,             nextid     }