How to quickly split an element into multiple elements？ #429
Comments
|
Hello @NodeGreenHand , Your images don't work. As asked when creating the issue, we would like to have a runnable example which at least starts your example, that will save us some time instead of redoing what you already did. Best Regards, Jon Performance Libraries Runtime Evaluation |
|
Hello @JonathanMagnan The problem has been revised. Please give me an idea, 3Q Best Regards, NodeGreenHand |
|
Hello @NodeGreenHand , Besides doing something manually on your side, there is no method shortcut that allows you to do exactly what you want to do |
|
Hello @JonathanMagnan Q1：Which basic operation methods are the fastest in HAP？ Why? span.XPath The value of is wrong Best Regards, NodeGreenHand |
Your question is too much broad, I'm not sure to understand what you want.
What's wrong? If you do |
|
Hell @JonathanMagnan Sorry, I'm wrong. It's not the XPath error, but the parentnode value of the element. It shouldn't be null, it should be the parent element of the new replacement Best Regards, NodeGreenHand |
|
Hello @NodeGreenHand , I'm not sure what you mean, could you explain it with some runnable code. This code also looks as expected: HtmlNode node = HtmlNode.CreateNode("<p><span>123</span></p>");
HtmlNode span = node.FirstChild;
HtmlNode newSpan = HtmlNode.CreateNode("<span></span>");
var xpath = newSpan.XPath;
newSpan.AppendChild(span);
node.RemoveAllChildren();
node.AppendChild(newSpan);
var xpath2= newSpan.XPath; |
|
Hello @JonathanMagnan
Sorry, maybe I didn't describe it clearly.
What I mean is to insert a new child element, Child1, into the P element.
All the original child elements of the P element are regarded as the child elements of the new element Child1.
HtmlNode pNode = HtmlNode.CreateNode("<p><span>123</span><span>456</span></p>");
HtmlNode spanNode1 = pNode.FirstChild;
HtmlNode spanNode2 = pNode.LastChild;
Console.WriteLine("the first child parent node is pNode：{0}; xPath is：{1}", pNode == spanNode1.ParentNode, spanNode1.XPath);
Console.WriteLine("the second child parent node is pNode：{0}; xPath is：{1}", pNode == spanNode2.ParentNode, spanNode2.XPath);
HtmlNode aNode = HtmlNode.CreateNode("<a></a>");
aNode.AppendChildren(pNode.ChildNodes);
Console.WriteLine("the first child parent node is aNode：{0}; xPath is：{1}", aNode == spanNode1.ParentNode, spanNode1.XPath);
Console.WriteLine("the second child parent node is aNode：{0}; xPath is：{1}", aNode == spanNode2.ParentNode, spanNode2.XPath);
pNode.RemoveAllChildren();
pNode.AppendChild(aNode);
Console.WriteLine("the first child parent node is null：{0}; xPath is：{1}", null == spanNode1.ParentNode, spanNode1.XPath);
Console.WriteLine("the second child parent node is null：{0}; xPath is：{1}", null == spanNode2.ParentNode, spanNode2.XPath);
Console.WriteLine("");
Console.WriteLine(pNode.OuterHtml);
Console.ReadLine();
When executing code：
pNode.RemoveAllChildren();
pNode.AppendChild(aNode);
output result is error
the element spanNode1 and spanNode2 parent element of the element should be a, not null，
spanNode1 xPath should be p[1]/a[1]/span[1]
spanNode2 xPath should be p[1]/a[1]/span[2]
Best Regards,
NodeGreenHand
|
|
Got it this time ;) The problem is that you append an existing node to another parent, but the old parent keep referencing them, so when you do: When appending an existing node, you should instead clone it. For example, something like this: HtmlNode aNode = HtmlNode.CreateNode("<a></a>");
// pNode.ChildNodes.ToList().ForEach(x => aNode.AppendChild(x.CloneNode(true)));
var childNodes = pNode.ChildNodes;
spanNode1 = childNodes[0].CloneNode(true);
spanNode2 = childNodes[1].CloneNode(true);
Console.WriteLine("the first child parent node is aNode：{0}; xPath is：{1}", aNode == spanNode1.ParentNode, spanNode1.XPath);
Console.WriteLine("the second child parent node is aNode：{0}; xPath is：{1}", aNode == spanNode2.ParentNode, spanNode2.XPath);
aNode.AppendChild(spanNode1);
aNode.AppendChild(spanNode2);Since they are cloned, they are not the same node as the one referenced in the So the output is now right: the first child parent node is null:False; xPath is:/p[1]/a[1]/span[1]
the second child parent node is null:False; xPath is:/p[1]/a[1]/span[2]Let me know if that explains correctly your current issue and the solution. Best Regards, Jon |
|
Hello @JonathanMagnan Although this idea can solve this problem, it is not my ideal solution. In my application scenario, such operations are frequently performed. If deep copy is carried out every time, it will be time-consuming, and I need to be more efficient. Therefore, in this case, can we change the logic in the removeallchildren() function to transfer the previously referenced element to another element directly, and all the data is correct I think that's the best solution. What do you think? Best Regards, |
|
We will look at it, What you are asking is a kind of |
|
Hello @JonathanMagnan Should it be more efficient，hehe Best Regards, |
|
Hello @JonathanMagnan In fact, to put it simply, it is to add a new function. The function is to "insert a child element into the parent element and move all the child elements of the original parent element to the new child element at the same time." In this new function, use the idea I said, so it's perfect Best Regards, |
|
Hello @NodeGreenHand , The v1.11.32 has finally been released. We added in this version the So instead of doing Let me know if that works as you would have wanted. Best Regards, Jon |
|
Hello @JonathanMagnan Thank you very much for taking my advice. I'll let you know if it's what I want after I test it. Best Regards, |
|
Hello @NodeGreenHand , A simple reminder that we are here to assist you! Don't hesitate to contact us once you test it! Best regards, Jon |
How to quickly split an element into multiple elements by taking a text substring in an element as a separating element
for example：
source element：<p><span><a href="void">0</a>123</span><span>45</span><span>678</span></p>
separate substrings：567
objective element：
<p><span><a href="void">0</a>123</span><span>4</span></p>
<p><span>5</span><span>67</span></p>
<p><span>8</span></p>
The text was updated successfully, but these errors were encountered: