題
我有一個ac＃代碼，它將讀取一個html文件並將其作為字符串/文本返回。
我需要做的一件事是解析html字符串，查找所有<embed>標籤，獲取“src”屬性中的值，然後將整個<embed>標籤替換為src找到的文件內容標籤。
我試圖使用HtmlAgilityPack來允許我解析HTML代碼。
我唯一無法做的是如何用另一個字符串替換<embed>標籤，最後將沒有<embed>標籤的新字符串返回給用戶。
這就是我所做的
protected string ParseContent(string content)
{
if (content != null)
{
//Create a new document parser object
HtmlAgilityPack.HtmlDocument document = new HtmlAgilityPack.HtmlDocument();
//load the content
document.LoadHtml(content);
//Get all embed tags
IEnumerable<HtmlNode> embedNodes = document.DocumentNode.Descendants("embed");
//Make sure the content contains at least one <embed> tag
if (embedNodes.Count() > 0)
{
// Outputs the href for external links
foreach (HtmlNode embedNode in embedNodes)
{
//Mak sure there is a source
if (embedNode.Attributes.Contains("src"))
{
//If the file ends with ".html"
if (embedNode.Attributes["src"].Value.EndsWith(".html"))
{
var newContent = GetContent(embedNode.Attributes["src"].Value);
//Here I need to be able to replace the entireembedNode with the newContent
}
}
}
}
return content;
}
return null;
}
protected string GetContent(string path)
{
if (System.IO.File.Exists(path))
{
//The file exists, read its content
return System.IO.File.ReadAllText(path);
}
return null;
}
如何用字符串替換<embed>標籤？
一般承認的答案
我想到了。感謝@COlD TOLD，他建議我將enumerable轉換為list
這就是我所做的。
protected string ParseContent(string content)
{
if (content != null)
{
//Create a new document parser object
HtmlAgilityPack.HtmlDocument document = new HtmlAgilityPack.HtmlDocument();
//load the content
document.LoadHtml(content);
//Get all embed tags
List<HtmlNode> embedNodes = document.DocumentNode.Descendants("embed").ToList();
//Make sure the content contains at least one <embed> tag
if (embedNodes.Count() > 0)
{
// Outputs the href for external links
foreach (HtmlNode embedNode in embedNodes)
{
//Mak sure there is a source
if (embedNode.Attributes.Contains("src"))
{
if (embedNode.Attributes["src"].Value.EndsWith(".html"))
{
//At this point we know that the source of the embed tag is set and it is an html file
//Get the full path
string embedPath = customBase + embedNode.Attributes["src"].Value;
//Get the
string newContent = GetContent(embedPath);
if (newContent != null)
{
//Create place holder div node
HtmlNode newNode = document.CreateElement("div");
//At this point we know the file exists, load it's content
newNode.InnerHtml = HtmlDocument.HtmlEncode(newContent);
//Here I need to be able to replace the entireembedNode with the newContent
document.DocumentNode.InsertAfter(newNode, embedNode);
//Remove the code after converting it
embedNode.Remove();
}
}
}
}
return document.DocumentNode.OuterHtml;
}
return content;
}
return null;
}
熱門答案
我想你可以嘗試讓這也是當前節點的父節點<embed>然後更換這是父母的子節點<embed>
var newContent = GetContent(embedNode.Attributes["src"].Value);
var ParentNodeT =embedNode.ParentNode;
var newNodeTtext = "<p>"+newContent+"</p>";
var newNodeT = HtmlNode.CreateNode(newNodeStr);
ParentNodeT.ReplaceChild(newNodeT, embedNode);