public static List <HtmlNode> ParseNodeByName(string text, string nodeName)
{
if (text == "")
{
return(null);
}
List <HtmlNode> nodeList = new List <HtmlNode>();
int nodeIndex = 0;
while (nodeIndex < text.Length - 1)
{
NodeString nodeStr = ParseNodeStringByName(text, ref nodeIndex, nodeName);
if (nodeStr == null)
{
break;
}
else if (nodeStr.Type == 2)
{
nodeList.Add(HtmlNode.ParseNode(nodeStr.NodeBlock));
}
else if (nodeStr.Type == 0)
{
int tmpIndex = nodeIndex;
string tagName = HtmlNode.GetNodeName(nodeStr.NodeBlock);
NodeString tmpNode = null;
Stack <int> cntStack = new Stack <int>();
cntStack.Push(0);
while (cntStack.Count != 0)
{
if (tmpIndex >= text.Length)
{
break; //到文本结尾仍未找到结束标签,则跳出
}
tmpNode = ParseNodeString(text, ref tmpIndex);
string tmpTagName = HtmlNode.GetNodeName(tmpNode.NodeBlock);
if (tmpTagName.ToLower() == nodeName.ToLower())
{
if (tmpNode.Type == 0)
{
cntStack.Push(0);
}
else if (tmpNode.Type == 1)
{
cntStack.Pop();
}
}
}
if (cntStack.Count == 0)//找到结束标签
{
HtmlNode node = HtmlNode.ParseNode(nodeStr.NodeBlock);
string innerNode = text.Substring(nodeIndex, tmpIndex - nodeIndex - tmpNode.NodeBlock.Length);
if (innerNode != "")//递归解析子节点
{
node.Childs = ParseNode(innerNode);
}
nodeList.Add(node);
nodeIndex = tmpIndex;
}
else
{
break;
}
}
}//循环结束
return(nodeList);
}
/// <summary>
/// 解析传入的字符串，并返回最上层节点列表
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public static List <HtmlNode> ParseNode(string text)
{
if (text == "")
{
return(null);
}
List <HtmlNode> nodeList = new List <HtmlNode>();
int nodeIndex = 0;
while (nodeIndex < text.Length - 1)
{
NodeString nodeStr = ParseNodeString(text, ref nodeIndex);
if (nodeStr.Type == 3 || nodeStr.Type == 2)//文本节点和闭合标签
{
nodeList.Add(HtmlNode.ParseNode(nodeStr.NodeBlock));
}
else if (nodeStr.Type == 0)//处理开放节点,寻找结束标记
{
int tmpIndex = nodeIndex;
string tagName = HtmlNode.GetNodeName(nodeStr.NodeBlock);
NodeString tmpNode = null;
Stack <int> cntStack = new Stack <int>();
cntStack.Push(0);
while (cntStack.Count != 0)
{
if (tmpIndex >= text.Length)
{
break; //到文本结尾仍未找到结束标签,则跳出
}
tmpNode = ParseNodeString(text, ref tmpIndex);
string tmpTagName = HtmlNode.GetNodeName(tmpNode.NodeBlock);
if (tmpTagName.ToLower() == tagName.ToLower())
{
if (tmpNode.Type == 0)
{
cntStack.Push(0);
}
else if (tmpNode.Type == 1)
{
cntStack.Pop();
}
}
}
if (cntStack.Count == 0)//找到结束标签
{
HtmlNode node = HtmlNode.ParseNode(nodeStr.NodeBlock);
string innerNode = text.Substring(nodeIndex, tmpIndex - nodeIndex - tmpNode.NodeBlock.Length);
if (innerNode != "")//递归解析子节点
{
node.Childs = ParseNode(innerNode);
}
nodeList.Add(node);
nodeIndex = tmpIndex;
}
else
{
HtmlDocParseExeption err = new HtmlDocParseExeption("Bad Document,Miss enclosed tag for " + nodeStr.NodeBlock);
throw err;
}
}
}//循环结束
return(nodeList);
}
