Analysieren von Tabellen, Zellen mit Html Agilität in C#

Question

Ich muss HTML-Code analysieren. Genauer gesagt, analysiere jede Zelle jeder Zeile in allen Tabellen. Jede Zeile repräsentiert ein einzelnes Objekt und jede Zelle repräsentiert unterschiedliche Eigenschaften. Ich möchte diese analysieren, um eine XML-Datei mit allen Daten darin schreiben zu können (ohne den nutzlosen HTML-Code). Ich bin erfolgreich in der Lage gewesen, jede Spalte von der HTML-Akte zu analysieren, aber jetzt weiß ich nicht, was meine Möglichkeiten sind, dieses in eine XML-Akte zu schreiben. Ich bin verwirrt.

HTML:

<tr><tr> 
<td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF"> 
    1 
</td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="left"> 
     <a href="/ice/player.htm?id=8471675">Sidney Crosby</a> 
    </td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="center"> 
     PIT 
    </td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="center"> 
     C 
    </td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="right"> 
     39 
    </td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="right"> 
     32 
    </td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="right"> 
     33 
    </td> 
    <td class="statBox sorted" style="border-width:0px 1px 1px 0px; background-color: #E0E0E0" align="right"> 
     <font color="#000000"> 
      65 
     </font> 
    </td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="right"> 
     20 
    </td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="right"> 
     29 
    </td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="right"> 
     10 
    </td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="right"> 
     1 
    </td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="right"> 
     3 
    </td> 
    <td class="statBox" style="border-width:0px 0px 1px 0px; background-color: #FFFFFF" align="right"> 
    </td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="right"> 
     0 
    </td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="right"> 
     154 
    </td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="right"> 
     20.8 
    </td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="right"> 
     21:54 
    </td> 
    <td class="statBox" style="border-width:0px 1px 1px 0px; background-color: #FFFFFF" align="right"> 
     22.6 
    </td> 
    <td class="statBox" style="border-width:0px 0px 1px 0px; background-color: #FFFFFF" align="right"> 
     55.7 
    </td> 
</tr></tr> 

C#:

using HtmlAgilityPack; 

namespace Stats 
{ 
    class StatsParser 
    { 
     private string htmlCode; 
     private static string fileName = "[" + DateTime.Now.ToShortDateString() + " NHL Stats].xml"; 

     public StatsParser(string htmlCode) 
     { 
      this.htmlCode = htmlCode; 
      this.ParseHtml(); 
     } 

     public void ParseHtml() 
    { 
     HtmlDocument doc = new HtmlDocument(); 
     doc.LoadHtml(htmlCode); 

     try 
     { 
      // Get all tables in the document 
      HtmlNodeCollection tables = doc.DocumentNode.SelectNodes("//table"); 

      // Iterate all rows in the first table 
      HtmlNodeCollection rows = tables[0].SelectNodes(".//tr"); 
      for (int i = 0; i < rows.Count; ++i) 
      { 

       // Iterate all columns in this row 
       HtmlNodeCollection cols = rows[i].SelectNodes(".//td[@class='statBox']"); 
       for (int j = 0; j < cols.Count; ++j) 
       { 

        // Get the value of the column and print it 
        string value = cols[j].InnerText; 
        if (value!="") 
         System.Windows.MessageBox.Show(value); 
       } 
      } 
     } 
     catch (NullReferenceException) 
     { 
      System.Windows.Forms.MessageBox.Show("Exception!!"); 
     } 
    } 

XML:

<?xml version="1.0" encoding="utf-8" ?> 

<Stats Date="2011-01-01"> 
    <Player Rank="1"> 
    <Name>Sidney Crosby</Name> 
    <Team>PIT</Team> 
    <Position>C</Position> 
    <GamesPlayed>39</GamesPlayed> 
    <Goals>32</Goals> 
    <Assists>33</Assists> 
    </Player> 
</Stats> 

Answer 1

Nach etwas MSDN, habe ich endlich eine Implementierung Lösung für mein Problem gefunden:

using System; 
    using HtmlAgilityPack; 
    using System.Xml; 

    namespace HockeyStats 
    { 
     class StatsParser 
     { 
      private string htmlCode; 
      private static string fileName = "[" + DateTime.Now.ToShortDateString() + " NHL Stats].xml"; 

      public StatsParser(string htmlCode) 
      { 
       this.htmlCode = htmlCode; 

       this.ParseHtml(); 
      } 

      public void ParseHtml() 
      { 

       HtmlDocument doc = new HtmlDocument(); 
       doc.LoadHtml(htmlCode); 
       XmlWriter writer = null; 

       try 
       { 
        // Create an XmlWriterSettings object with the correct options. 
        XmlWriterSettings settings = new XmlWriterSettings(); 
        settings.Indent = true; 
        settings.IndentChars = (" "); 
        settings.OmitXmlDeclaration = false; 

        // Create the XmlWriter object and write some content. 
        writer = XmlWriter.Create(@"..\..\"+fileName, settings); 
        writer.WriteStartElement("Stats"); 
        writer.WriteAttributeString("Date", DateTime.Now.ToShortDateString()); 

       // Iterate all rows within another row 
       HtmlNodeCollection rows = doc.DocumentNode.SelectNodes(".//tr/tr"); 
       for (int i = 0; i < rows.Count; ++i) 
       { 
        // Iterate all columns in this row 
        HtmlNodeCollection cols = rows[i].SelectNodes(".//td[@class='statBox']"); 
        for (int j = 0; j < 20; ++j) 
        { 
           switch (j) 
           { 
            case 0: 
             { 
              writer.WriteStartElement("Player"); 
              writer.WriteAttributeString("Rank", cols[j].InnerText.Trim()); break; 
             } 
            case 1: writer.WriteElementString("Name", cols[j].InnerText.Trim()); break; 
            case 2: writer.WriteElementString("Team", cols[j].InnerText.Trim()); break; 
            case 3: writer.WriteElementString("Pos", cols[j].InnerText.Trim()); break; 
            case 4: writer.WriteElementString("GP", cols[j].InnerText.Trim()); break; 
            case 5: writer.WriteElementString("G", cols[j].InnerText.Trim()); break; 
            case 6: writer.WriteElementString("A", cols[j].InnerText.Trim()); break; 
            case 7: writer.WriteElementString("PlusMinus", cols[j].InnerText.Trim()); break; 
            case 8: writer.WriteElementString("PIM", cols[j].InnerText); break; 
            case 9: writer.WriteElementString("PP", cols[j].InnerText); break; 
            case 10: writer.WriteElementString("SH", cols[j].InnerText); break; 
            case 11: writer.WriteElementString("GW", cols[j].InnerText); break; 
            case 12: writer.WriteElementString("OT", cols[j].InnerText); break; 
            case 13: writer.WriteElementString("Shots", cols[j].InnerText); break; 
            case 14: writer.WriteElementString("ShotPctg", cols[j].InnerText); break; 
            case 15: writer.WriteElementString("TOIPerGame", cols[j].InnerText); break; 
            case 16: writer.WriteElementString("ShiftsPerGame", cols[j].InnerText); break; 
            case 17: writer.WriteElementString("FOWinPctg", cols[j].InnerText); break; 

           } 
          } 
         } 
         writer.WriteEndElement(); 
        } 
        writer.WriteEndElement(); 
        writer.Flush(); 
       } 
       finally 
       { 
        if (writer != null) 
         writer.Close(); 
       } 
      } 
     } 
    } 

, die folgende XML-Datei als Ausgabe gibt:

<?xml version="1.0" encoding="utf-8" ?> 
<Stats Date="2011-01-01"> 
<Player Rank="1"> 
    <Name>Sidney Crosby</Name> 
    <Team>PIT</Team> 
    <Pos>C</Pos> 
    <GP>39</GP> 
    <G>32</G> 
    <A>33</A> 
    <PlusMinus>20</PlusMinus> 
    <PIM>29</PIM> 
    <PP>10</PP> 
    <SH>1</SH> 
    <GW>3</GW> 
    <Shots>0</Shots> 
    <ShotPctg>154</ShotPctg> 
    <TOIPerGame>20.8</TOIPerGame> 
    <ShiftsPerGame>21:54</ShiftsPerGame> 
    <FOWinPctg>22.6</FOWinPctg> 
</Player> 
</Stats> 

Answer 2

Was ich in meinem Kommentar gemeint hatte, war, dass man in Code (die verschachtelten Schleifen) ist zu tun, was die richtige XPath, die für Sie tun kann. Die Verwendung von LINQ-to-XML kann das Schreiben noch einfacher machen. Aber jetzt, wo wir sehen, wie Sie Ihre XML-Datei formatiert haben, können wir unsere eigenen Antworten anbieten. Ich würde die ParseHtml() Methode, wie so schreiben:

public void ParseHtml() 
{ 
    var htmlDoc = new HtmlDocument(); 
    htmlDoc.LoadHtml(htmlCode); 
    var cells = htmlDoc.DocumentNode 
            // use the right XPath rather than looping manually 
         .SelectNodes(@"//tr/tr/td[@class='statBox']") 
         .Select(node => node.InnerText.Trim()) 
         .ToList(); 
    var elementNames = new[] { "Name", "Team", "Pos", "GP", "G", "A", "PlusMinus", "PIM", "PP", "SH", "GW", "OT", "Shots", "ShotPctg", "TOIPerGame", "ShiftsPerGame", "FOWinPctg", "UnknownField" }; 
    var xmlDoc = 
     new XElement("Stats", new XAttribute("Date", DateTime.Now.ToShortDateString()), 
      new XElement("Player", new XAttribute("Rank", cells.First()), 
       // generate the elements based on the parsed cells 
       cells.Skip(1) 
        .Zip(elementNames, (Value, Name) => new XElement(Name, Value)) 
        .Where(element => !String.IsNullOrEmpty(element.Value)) 
      ) 
     ); 

    // save to your file 
    xmlDoc.Save(filepath); 
} 

erzeugt die Ausgabe:

<?xml version="1.0" encoding="utf-8"?> 
<Stats Date="1/3/2011"> 
    <Player Rank="1"> 
    <Name>Sidney Crosby</Name> 
    <Team>PIT</Team> 
    <Pos>C</Pos> 
    <GP>39</GP> 
    <G>32</G> 
    <A>33</A> 
    <PlusMinus>20</PlusMinus> 
    <PIM>29</PIM> 
    <PP>10</PP> 
    <SH>1</SH> 
    <GW>3</GW> 
    <Shots>0</Shots> 
    <ShotPctg>154</ShotPctg> 
    <TOIPerGame>20.8</TOIPerGame> 
    <ShiftsPerGame>21:54</ShiftsPerGame> 
    <FOWinPctg>22.6</FOWinPctg> 
    <UnknownField>55.7</UnknownField> 
    </Player> 
</Stats>