private void GetElementsStringList(string html, ref List <string> eleList)
{
HtmlInfo info = new HtmlInfo();
info.TagName = Regex.Match(html, @"(?<=\<\s{0,5}|\<)([a-z,A-Z]+|h\d{1})(?=\>|\s)", RegexOptions.IgnoreCase).Value;
string currentTagBeginReg = @"<\s{0,10}" + info.TagName + @".*?>"; //获取当前标签元素开始标签正则
string currentTagEndReg = @"\<\/" + info.TagName + @"\>"; //获取当前标签元素收尾标签正则
if (string.IsNullOrEmpty(info.TagName))
{
return;
}
string eleHtml = "";
//情况1 <a/>
//情况2 <a></a>
//情况3 <a> 错误格式
//情况4endif
if (Regex.IsMatch(html, @"<\s{0,10}" + info.TagName + "[^<].*?/>"))//单标签
{
eleHtml = Regex.Match(html, @"<\s{0,10}" + info.TagName + "[^<].*?/>").Value;
}
else if (!Regex.IsMatch(html, currentTagEndReg))//没有收尾
{
if (Regex.IsMatch(html, @"\s{0,10}\<\!\-\-\[if"))
{
eleHtml = GetElementString(html, @"\s{0,10}\<\!\-\-\[if", @"\[endif\]\-\-\>", 1);
}
else
{
eleHtml = Regex.Match(html, currentTagBeginReg, RegexOptions.Singleline).Value;
}
}
else
{
eleHtml = GetElementString(html, currentTagBeginReg, currentTagEndReg, 1);
}
try
{
eleList.Add(eleHtml);
html = html.Replace(eleHtml, "");
html = Regex.Replace(html, @"<\!DOCTYPE.*?>", "");
if (!Regex.IsMatch(html, @"^\s*$"))
{
GetElementsStringList(html, ref eleList);
}
}
catch (Exception ex)
{
throw new Exception("SORRY,您的HTML格式不能解析！！！");
}
}
/// <summary>
/// 获取第一级元素
/// </summary>
/// <param name="elementName"></param>
/// <returns></returns>
public List <HtmlInfo> RootDescendants(string html = null)
{
/*
* 业务逻辑:
* 1、获取第一个html标签一直找结尾标签，如果在这个过程中遇到相同的标签收尾标签就要加1
* 2、第一个标签取到后继续第一步操作，找第2个元素 。。第N个元素
*/
if (html == null)
{
html = _html;
}
var firstTag = Regex.Match(html, "<.+?>");
List <string> eleList = new List <string>();
List <HtmlInfo> reval = new List <HtmlInfo>();
GetElementsStringList(html, ref eleList);
foreach (var r in eleList)
{
HtmlInfo data = new HtmlInfo();
data.OldFullHtml = r;
data.SameLeveHtml = html;
data.TagName = Regex.Match(r, @"(?<=\s{1}|\<)[a-z,A-Z]+(?=\>|\s)", RegexOptions.IgnoreCase).Value;
data.InnerHtml = Regex.Match(r, @"(?<=\>).+(?=<)", RegexOptions.Singleline).Value;
var eleBegin = Regex.Match(r, "<.+?>").Value;
var attrList = Regex.Matches(eleBegin, @"[a-z,A-Z]+\="".+?""").Cast <Match>().Select(c => new { key = c.Value.Split('=').First(), value = c.Value.Split('=').Last().TrimEnd('"').TrimStart('"') }).ToList();
data.Attributes = new Dictionary <string, string>();
if (attrList != null && attrList.Count > 0)
{
foreach (var a in attrList)
{
data.Attributes.Add(a.key, a.value);
}
}
reval.Add(data);
}
return(reval);
}