javascript 代码通过异步请求填充的 resultsTable 元素的内容。因此,您不应该处理 DOM,而是必须像 javascript 那样直接查询数据。下面的代码可能是一个很好的起点。
class Program
{
private static readonly string url = "http://www.cmegroup.com/clearing/trading-practices/CmeWS/mvc/xsltTransformer.do?xlstDoc=/XSLT/md/blocks-records.xsl&url=/da/BlockTradeQuotes/V1/Block/BlockTrades?exchange={0}&foi={1}&{2}&tradeDate={3}&sortCol={4}&sortBy={5}&_=1372913232800";
static void Main(string[] args)
{
Exchange exchange = Exchange.XCME;
ContractType contractType = ContractType.FUT | ContractType.OPT | ContractType.SPD;
string assetClass = "assetClassId=0"; // See asset_class dropdown options in HTML source for valid values
DateTime tradeDate = new DateTime(2013, 7, 3);
string sortCol = "time"; // Column to sort
SortOrder sortOrder = SortOrder.desc;
string xml = QueryData(exchange, contractType, assetClass, tradeDate, sortCol, sortOrder);
Console.WriteLine(xml);
}
private static string QueryData(Exchange exchange, ContractType contractType, string assetClass, DateTime tradeDate, string sortCol, SortOrder sortOrder)
{
string exc = GetEnumString(exchange);
string ct = GetEnumString(contractType);
string td = tradeDate.ToString("MMddyyyy");
string query = string.Format(url, exc, ct, assetClass, td, sortCol, sortOrder.ToString());
WebRequest request = WebRequest.Create(query);
request.Credentials = CredentialCache.DefaultCredentials;
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
using (Stream stream = response.GetResponseStream())
{
using (StreamReader reader = new StreamReader(stream))
{
return reader.ReadToEnd();
}
}
}
}
private static string GetEnumString(Enum item)
{
return item.ToString().Replace(" ", "");
}
}
[Flags]
enum Exchange
{
/// <summary>
/// CBOT.
/// </summary>
XCBT = 1,
/// <summary>
/// CME.
/// </summary>
XCME = 2,
/// <summary>
/// COMEX.
/// </summary>
XCEC = 4,
/// <summary>
/// DME.
/// </summary>
DUMX = 8,
/// <summary>
/// NYMEX.
/// </summary>
XNYM = 16
}
[Flags]
enum ContractType
{
/// <summary>
/// Futures.
/// </summary>
FUT = 1,
/// <summary>
/// Options.
/// </summary>
OPT = 2,
/// <summary>
/// Spreads.
/// </summary>
SPD = 4
}
enum SortOrder
{
/// <summary>
/// Ascending.
/// </summary>
asc,
/// <summary>
/// Descending.
/// </summary>
desc
}
结果在 xml 变量中(请参阅)。
祝你好运。