本文介绍了从htmldocument:HTMLAgilityPack中删除html节点的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
在我的代码中,我想删除没有src值的img标签。
我使用 HTMLAgilitypack的HtmlDocument 对象。
我找到的img没有src值,并试图删除它..但它给我错误集合被修改;枚举操作可能无法执行。
任何人都可以帮助我吗?
我使用的代码是:
In my code, I want to remove the img tag which doesn't have src value. I am using HTMLAgilitypack's HtmlDocument object. I am finding the img which doesn't have src value and trying to remove it.. but it gives me error Collection was modified; enumeration operation may not execute. Can anyone help me for this? The code which I have used is:
foreach (HtmlNode node in doc.DocumentNode.DescendantNodes())
{
if (node.Name.ToLower() == "img")
{
string src = node.Attributes["src"].Value;
if (string.IsNullOrEmpty(src))
{
node.ParentNode.RemoveChild(node, false);
}
}
else
{
..........// i am performing other operations on document
}
}
推荐答案
p>
What I have done is:
List<string> xpaths = new List<string>();
foreach (HtmlNode node in doc.DocumentNode.DescendantNodes())
{
if (node.Name.ToLower() == "img")
{
string src = node.Attributes["src"].Value;
if (string.IsNullOrEmpty(src))
{
xpaths.Add(node.XPath);
continue;
}
}
}
foreach (string xpath in xpaths)
{
doc.DocumentNode.SelectSingleNode(xpath).Remove();
}
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