private void matchXPath()
{
try
{
txt_outContent.Text = "";
string xpath = txt_xpath.Text;
string html = txt_SourceHtml.Text;// dto.SourceHtml;
ResultContentType contentType = ResultContentType.Text;
contentType = ck_outhtml.IsChecked.Value ? ResultContentType.OuterHtml : contentType;
XpathMatchResult result = XPathHelper.Match(xpath, html, contentType);
if (!result.Success)
{
MessageBox.Show(result.Message);
}
else
{
StringBuilder sb = new StringBuilder();
sb.AppendLine(string.Format("共匹配到{0}条", result.Count));
sb.AppendLine();
sb.AppendLine();
int index = 1;
foreach (var item in result.Result)
{
sb.AppendLine($"#region {index}");
sb.AppendLine(item);
sb.AppendLine("#endregion");
sb.AppendLine();
index++;
}
txt_outContent.Text = sb.ToString();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
public static XpathMatchResult Match(string xpath, string html, ResultContentType type = ResultContentType.OuterHtml)
{
XpathMatchResult result = new XpathMatchResult();
string attr = "";
Match match = Regex.Match(xpath, "^(?<xpath>.+?)/@(?<attr>[^(/@)]+)$");
if (match.Success)
{
xpath = match.Groups["xpath"].Value;
attr = match.Groups["attr"].Value;
}
if (string.IsNullOrWhiteSpace(html))
{
result.Message = "需要匹配内容不存在";
}
else if (string.IsNullOrWhiteSpace(xpath))
{
result.Message = "xpath语句不存在";
}
else
{
result.Success = true;
HtmlDocument htmlDocument = new HtmlDocument();
htmlDocument.LoadHtml(html);
HtmlNodeCollection htmlNodeCollection = htmlDocument.DocumentNode.SelectNodes(xpath);
int num = (htmlNodeCollection != null) ? htmlNodeCollection.Count : 0;
if (num > 0)
{
foreach (HtmlNode htmlNode in ((IEnumerable <HtmlNode>)htmlNodeCollection))
{
string value = "";
if (string.IsNullOrWhiteSpace(attr))
{
switch (type)
{
case ResultContentType.OuterHtml:
value = htmlNode.OuterHtml;
break;
case ResultContentType.InnerHtml:
value = htmlNode.InnerHtml;
break;
case ResultContentType.Text:
value = htmlNode.InnerText;
break;
default:
break;
}
}
else
{
HtmlAttribute htmlAttribute = htmlNode.Attributes[attr];
if (htmlAttribute != null)
{
value = htmlAttribute.Value;
}
else
{
value = "无" + attr + "属性";
}
}
result.Result.Add(value);
}
}
}
return(result);
}