private string AnalyzeTXPath(TXPath txpath, HtmlNode hnPre)
{
string xpath = txpath.Xpath;
string attri = txpath.Attri;
string position = txpath.Position;
//特别处理
if (xpath.StartsWith("./@"))
{
string val = hnPre.Attributes[attri].Value;
return(val);
}
HtmlNode hn = hnPre.SelectSingleNode(xpath);
if (hn == null)
{
throw new Exception("xpath position failed " + xpath);
}
if (attri != null)
{
string val = hn.Attributes[attri].Value;
return(val);
}
String value = Position(hn, position);
return(value);
}
private void AnalyzeTField(TField tfield, HtmlNode hn, XmlElement root, XmlDocument xdResult)
{
string name = tfield.Name;
TConst tconst = tfield.TConst;
TXPath txpath = tfield.TXPath;
TRegex tregex = tfield.TRegex;
if (txpath == null)
{
String valConst = AnalyzeTConst(tconst);
AddElement(name, valConst, root, xdResult);
return;
}
String valXpath = AnalyzeTXPath(txpath, hn);
if (tregex == null)
{
AddElement(name, valXpath, root, xdResult);
return;
}
String valRegex = AnalyzeTRegex(tregex, valXpath);
AddElement(name, valRegex, root, xdResult);
}
private static TXPath GetTXPath(XmlNode xnField)
{
XmlNode xnXPath = xnField.SelectSingleNode(@"./xpath");
if (xnXPath == null)
{
return(null);
}
string xpath = xnXPath.InnerText;
XmlNode xnPostion = xnXPath.Attributes["position"];
string position = xnPostion == null ? "innertext" : xnPostion.Value;
TXPath tx = new TXPath(xpath, position);
return(tx);
}
private static TField GetTField(XmlNode xnField)
{
XmlNode xnName = xnField.SelectSingleNode(@"./name");
if (xnName == null)
{
throw new Exception("no name tag found");
}
string name = xnName.InnerText;
TXPath tx = GetTXPath(xnField);
TRegex tr = GetTRegex(xnField);
TConst tc = GetTConst(xnField);
TField tf = new TField(name, tx, tr, tc);
return(tf);
}