private GeckoHtmlElement GetElementByXpath(GeckoDocument doc, string xpath)
{
if (doc == null) return null;
xpath = xpath.Replace("/html/", "");
GeckoElementCollection eleColec = doc.GetElementsByTagName("html"); if (eleColec.Length == 0) return null;
GeckoHtmlElement ele = eleColec[0];
string[] tagList = xpath.Split(new string[] { "/" }, StringSplitOptions.RemoveEmptyEntries);
foreach (string tag in tagList)
{
System.Text.RegularExpressions.Match mat = System.Text.RegularExpressions.Regex.Match(tag, "(?<tag>.+)\\[@id='(?<id>.+)'\\]");
if (mat.Success == true)
{
string id = mat.Groups["id"].Value;
GeckoHtmlElement tmpEle = doc.GetHtmlElementById(id);
if (tmpEle != null) ele = tmpEle;
else
{
ele = null;
break;
}
}
else
{
mat = System.Text.RegularExpressions.Regex.Match(tag, "(?<tag>.+)\\[(?<ind>[0-9]+)\\]");
if (mat.Success == false)
{
GeckoHtmlElement tmpEle = null;
foreach (GeckoNode it in ele.ChildNodes)
{
if (it.NodeName.ToLower() == tag)
{
tmpEle = (GeckoHtmlElement)it;
break;
}
}
if (tmpEle != null) ele = tmpEle;
else
{
ele = null;
break;
}
}
else
{
string tagName = mat.Groups["tag"].Value;
int ind = int.Parse(mat.Groups["ind"].Value);
int count = 0;
GeckoHtmlElement tmpEle = null;
foreach (GeckoNode it in ele.ChildNodes)
{
if (it.NodeName.ToLower() == tagName)
{
count++;
if (ind == count)
{
tmpEle = (GeckoHtmlElement)it;
break;
}
}
}
if (tmpEle != null) ele = tmpEle;
else
{
ele = null;
break;
}
}
}
}
return ele;
}