问题描述

在我的代码中，我想删除没有 src 值的 img 标签.我正在使用 HTMLAgilitypack 的 HtmlDocument 对象.我正在寻找没有 src 值的 img 并试图将其删除.. 但它给了我错误 Collection was modified;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

我做的是:

    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();
    }

这篇关于从 htmldocument 中删除 html 节点:HTMLAgilityPack的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！