Difficulty arises when attempting to remove a node using Html Agility Pack

After successfully installing the Html Agility Pack to my asp.net project, I have been able to extract data from a different web page and display it without any issues. However, I am currently facing a problem. I have identified a div with the id of header, within which there is another div with the class name login that I want to remove. Below is the code snippet I am using:

//Get the div with the id of footer
HtmlNode node = doc.DocumentNode.SelectSingleNode("//div[@id='header']");

//Remove login div
HtmlNode loginSection = node.SelectSingleNode("//div[@class='login']");

node.RemoveChild(loginSection);

Although the loginSection variable does contain a value at this point, indicating that the selected div exists, I encounter an error when trying to call the RemoveChild function:

Node "<div class="login"></div>" was not found in the collection

Despite searching for solutions on stackoverflow, I have yet to find a resolution to this issue.

jqueryhtmlcssasp.nethtml-agility-pack

Answer №1

After some investigation, I discovered that the key is to first select the parent node before accessing the loginSection node.

Here is the updated and functional code snippet:

// Identify the div element with the footer ID
HtmlNode parentNode = doc.DocumentNode.SelectSingleNode("//div[@id='header']");

// Locate the login section within the parent node
HtmlNode loginSection = parentNode.SelectSingleNode("//div[@class='login']");

// Remove the login section from its parent node
loginSection.ParentNode.RemoveChild(loginSection);

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