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POHTML Agility Pack strip tags NOT IN whitelist
primarykey
Id
3107514
data
AcceptedAnswerId
3107567
AnswerCount
2
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2010-06-24T05:52:00.593
FavoriteCount
25
LastActivityDate
2012-04-04T19:18:35.617
LastEditDate
2012-04-04T19:18:35.617
LastEditorUserId
134445
OwnerUserId
249895
ParentId
0
PostTypeId
1
Score
29
ViewCount
15733
LastEditorDisplayName
text
Body
I'm trying to create a function which removes html tags and attributes which are not in a white list. I have the following HTML: <pre><code>first text second text here <a>some text here</a> <a>some text here</a> <a>some twxt here</a> </code></pre> I am using HTML agility pack and the code I have so far is: <pre><code>static List<string> WhiteNodeList = new List<string> { "b" }; static List<string> WhiteAttrList = new List<string> { }; static HtmlNode htmlNode; public static void RemoveNotInWhiteList(out string _output, HtmlNode pNode, List<string> pWhiteList, List<string> attrWhiteList) { // remove all attributes not on white list foreach (var item in pNode.ChildNodes) { item.Attributes.Where(u => attrWhiteList.Contains(u.Name) == false).ToList().ForEach(u => RemoveAttribute(u)); } // remove all html and their innerText and attributes if not on whitelist. //pNode.ChildNodes.Where(u => pWhiteList.Contains(u.Name) == false).ToList().ForEach(u => u.Remove()); //pNode.ChildNodes.Where(u => pWhiteList.Contains(u.Name) == false).ToList().ForEach(u => u.ParentNode.ReplaceChild(ConvertHtmlToNode(u.InnerHtml),u)); //pNode.ChildNodes.Where(u => pWhiteList.Contains(u.Name) == false).ToList().ForEach(u => u.Remove()); for (int i = 0; i < pNode.ChildNodes.Count; i++) { if (!pWhiteList.Contains(pNode.ChildNodes[i].Name)) { HtmlNode _newNode = ConvertHtmlToNode(pNode.ChildNodes[i].InnerHtml); pNode.ChildNodes[i].ParentNode.ReplaceChild(_newNode, pNode.ChildNodes[i]); if (pNode.ChildNodes[i].HasChildNodes && !string.IsNullOrEmpty(pNode.ChildNodes[i].InnerText.Trim().Replace("\r\n", ""))) { HtmlNode outputNode1 = pNode.ChildNodes[i]; for (int j = 0; j < pNode.ChildNodes[i].ChildNodes.Count; j++) { string _childNodeOutput; RemoveNotInWhiteList(out _childNodeOutput, pNode.ChildNodes[i], WhiteNodeList, WhiteAttrList); pNode.ChildNodes[i].ReplaceChild(ConvertHtmlToNode(_childNodeOutput), pNode.ChildNodes[i].ChildNodes[j]); i++; } } } } // Console.WriteLine(pNode.OuterHtml); _output = pNode.OuterHtml; } private static void RemoveAttribute(HtmlAttribute u) { u.Value = u.Value.ToLower().Replace("javascript", ""); u.Remove(); } public static HtmlNode ConvertHtmlToNode(string html) { HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument(); doc.LoadHtml(html); if (doc.DocumentNode.ChildNodes.Count == 1) return doc.DocumentNode.ChildNodes[0]; else return doc.DocumentNode; } </code></pre> The output I am tryig to achieve is <pre><code>first text second text here some text here some text here some twxt here </code></pre> That means that I only want to keep the <code></code> tags. The reason i'm doing this is because Some of the users do cpoy-paste from MS WORD into ny WYSYWYG html editor. Thanks.!
Tags
<c#><tags><html-parsing><html-agility-pack><sanitize>
Title
HTML Agility Pack strip tags NOT IN whitelist
singulars
PostAcceptedAnswerId
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USBrian Cauthon
UserOwnerUserId
1. USDragos Durlut
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
2. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
3. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
2. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
CommentsPostId
1. This table or related slice is empty.

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