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(C# UWP/WinRT) HTML Table to CSV

Demonstrates a method for converting an HTML table to a CSV file.

Note: This example requires Chilkat v9.5.0.77 or greater.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// First download the HTML containing the table
Chilkat.Http http = new Chilkat.Http();
Chilkat.BinData bdHtml = new Chilkat.BinData();

bool success = await http.QuickGetBdAsync("https://example-code.com/data/etf_table.html",bdHtml);
if (success != true) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

// Convert to XML.
Chilkat.HtmlToXml htx = new Chilkat.HtmlToXml();
htx.SetHtmlBd(bdHtml);

Chilkat.StringBuilder sbXml = new Chilkat.StringBuilder();
htx.ToXmlSb(sbXml);

Chilkat.Xml xml = new Chilkat.Xml();
xml.LoadSb(sbXml,true);

// Remove attributes and sub-trees we don't need.
// (In other words, we're getting rid of clutter...)
int numRemoved = xml.PruneTag("thead");
numRemoved = xml.PruneAttribute("style");
numRemoved = xml.PruneAttribute("class");

// Scrub the element and attribute content.
xml.Scrub("ContentTrimEnds,ContentTrimInside,AttrTrimEnds,AttrTrimInside");

// Let's see what we have...
Debug.WriteLine(xml.GetXml());

// We have the following XML.
// Copy this XML into the online tool at Generate Parsing Code from XML
// as a starting point for accessing the data..

// <?xml version="1.0" encoding="utf-8"?>
// <root>
//     <html>
//         <head>
//             <meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
//         </head>
//         <body text="#000000" bgcolor="#FFFFFF">
//             <div>
//                 <div>
//                     <table role="grid" data-scrollx="true" data-sortdirection="desc" data-sorton="-1"/>
//                 </div>
//             </div>
//             <div>
//                 <table id="topHoldingsTable" role="grid" data-scrollx="true" data-sortdirection="desc" data-sorton="-1">
//                     <tbody>
//                         <tr role="row">
//                             <td>
//                                 <text>ITUB4</text>
//                             </td>
//                             <td>
//                                 <text>ITAU UNIBANCO HOLDING PREF SA</text>
//                             </td>
//                             <td>
//                                 <text>Financials</text>
//                             </td>
//                             <td>
//                                 <text>Brazil</text>
//                             </td>
//                             <td>
//                                 <text>10.94</text>
//                             </td>
//                             <td>
//                                 <text>998,954,813.73</text>
//                             </td>
//                         </tr>
//                         <tr role="row">
//                             <td>
//                                 <text>BBDC4</text>
//                             </td>
//                             <td>
//                                 <text>BANCO BRADESCO PREF SA</text>
//                             </td>
//                             <td>
//                                 <text>Financials</text>
//                             </td>
//                             <td>
//                                 <text>Brazil</text>
//                             </td>
//                             <td>
//                                 <text>9.01</text>
//                             </td>
//                             <td>
//                                 <text>822,164,622.75</text>
//                             </td>
//                         </tr>
// 			...
// 			...
// 			...
//                     </tbody>
//                 </table>
//             </div>
//         </body>
//     </html>
// </root>

// 
// This is the code generated by the online tool:
// 
int i;
int count_i;
string table_role;
string table_data_scrollx;
string table_data_sortdirection;
string table_data_sorton;
string table_id;
int j;
int count_j;
string tr_role;
int k;
int count_k;
string tagPath;
string text;

i = 0;
count_i = xml.NumChildrenHavingTag("html|body|div");
while (i < count_i) {
    xml.I = i;
    table_role = xml.ChilkatPath("html|body|div[i]|div|table|(role)");
    table_data_scrollx = xml.ChilkatPath("html|body|div[i]|div|table|(data-scrollx)");
    table_data_sortdirection = xml.ChilkatPath("html|body|div[i]|div|table|(data-sortdirection)");
    table_data_sorton = xml.ChilkatPath("html|body|div[i]|div|table|(data-sorton)");
    table_id = xml.ChilkatPath("html|body|div[i]|table|(id)");
    table_role = xml.ChilkatPath("html|body|div[i]|table|(role)");
    table_data_scrollx = xml.ChilkatPath("html|body|div[i]|table|(data-scrollx)");
    table_data_sortdirection = xml.ChilkatPath("html|body|div[i]|table|(data-sortdirection)");
    table_data_sorton = xml.ChilkatPath("html|body|div[i]|table|(data-sorton)");
    j = 0;
    count_j = xml.NumChildrenHavingTag("html|body|div[i]|table|tbody|tr");
    while (j < count_j) {
        xml.J = j;
        tr_role = xml.ChilkatPath("html|body|div[i]|table|tbody|tr[j]|(role)");
        k = 0;
        count_k = xml.NumChildrenHavingTag("html|body|div[i]|table|tbody|tr[j]|td");
        while (k < count_k) {
            xml.K = k;
            text = xml.GetChildContent("html|body|div[i]|table|tbody|tr[j]|td[k]|text");
            k = k + 1;
        }

        j = j + 1;
    }

    i = i + 1;
}

// Let's modify the above code to build the CSV.
Chilkat.Csv csv = new Chilkat.Csv();
csv.SetColumnName(0,"Ticker");
csv.SetColumnName(1,"Name");
csv.SetColumnName(2,"Sector");
csv.SetColumnName(3,"Country");
csv.SetColumnName(4,"Weight");
csv.SetColumnName(5,"Notional Vaue");

i = 0;
count_i = xml.NumChildrenHavingTag("html|body|div");
while (i < count_i) {
    xml.I = i;
    j = 0;
    count_j = xml.NumChildrenHavingTag("html|body|div[i]|table|tbody|tr");
    while (j < count_j) {
        xml.J = j;
        k = 0;
        count_k = xml.NumChildrenHavingTag("html|body|div[i]|table|tbody|tr[j]|td");
        while (k < count_k) {
            xml.K = k;
            csv.SetCell(j,k,xml.GetChildContent("html|body|div[i]|table|tbody|tr[j]|td[k]|text"));
            k = k + 1;
        }

        j = j + 1;
    }

    i = i + 1;
}

csv.SaveFile("qa_output/brasil_etf.csv");
string csvStr = csv.SaveToString();
Debug.WriteLine(csvStr);

// Our CSV looks like this:
// Ticker,Name,Sector,Country,Weight,Notional Vaue
// ITUB4,ITAU UNIBANCO HOLDING PREF SA,Financials,Brazil,10.94,"998,954,813.73"
// BBDC4,BANCO BRADESCO PREF SA,Financials,Brazil,9.01,"822,164,622.75"
// VALE3,CIA VALE DO RIO DOCE SH,Materials,Brazil,8.60,"785,290,260.07"
// PETR4,PETROLEO BRASILEIRO PREF SA,Energy,Brazil,5.68,"518,124,434.10"
// PETR3,PETROBRAS,Energy,Brazil,4.86,"443,254,438.53"
// B3SA3,B3 BRASIL BOLSA BALCAO SA,Financials,Brazil,4.57,"417,636,740.16"
// ABEV3,AMBEV SA,Consumer Staples,Brazil,4.57,"417,216,913.63"
// BBAS3,BANCO DO BRASIL SA,Financials,Brazil,3.25,"296,921,232.15"
// ITSA4,ITAUSA INVESTIMENTOS ITAU PREF SA,Financials,Brazil,2.90,"265,153,684.52"
// LREN3,LOJAS RENNER SA,Consumer Discretionary,Brazil,2.25,"205,832,175.98"
// 

 

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