本文介绍了C#HtmlDe code特定的标签只的处理方法,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

我有一个大htmlen codeD字符串,我想德code只有特定的白名单中的HTML标记。

有没有办法在C#中要做到这一点,WebUtility.HtmlDe code()德codeS的一切。

`我找德codeSpecificTags的implementaiton(),将通过下面的测试。

  [测试]
    公共无效德codeSpecificTags_SimpleInput_True()
    {
        字符串输入=放大器; LT;跨度和放大器; GT;我是&放大器; LT;强烈的颜色=蓝色和放大器; GT;极和放大器; LT; / STRONG&放大器; GT;大&放大器; LT; BR&放大器; GT;人&放大器; LT; /跨度&放大器; gt;中;
        字符串输出=放大器; LT;跨度和放大器; GT;我是<强烈的颜色=蓝色>非常< / STRONG>大< BR>人&放大器; LT; / SPAN&放大器; GT;
        清单<串GT;白名单=新名单,LT;串>(){强,BR};        Assert.IsTrue(德codeSpecificTags(白名单,输入)==输出);
    }`


解决方案

一个更好的办法是使用一些HTML解析器像Agilitypack或csquery或Nsoup找到一个循环的特定元素和去code吧。

检查一下吧,我做到了使用csquery:

 字符串输入=放大器; LT;跨度和放大器; GT;我是&放大器; LT;强烈的颜色=蓝色和放大器; GT;极和放大器; LT; / STRONG&放大器; GT;大&放大器; LT ; BR&放大器; GT;人与放大器; LT; / SPAN&放大器; GT;
字符串输出=放大器; LT;跨度和放大器; GT;我是<强烈的颜色=蓝色>非常< / STRONG>大< BR>人&放大器; LT; / SPAN&放大器; GT;VAR德codeD = HttpUtility.HtmlDe code(输出);
变种EN codeD =输入; // HttpUtility.HtmlEn code(德codeD);Console.WriteLine(EN codeD);
Console.WriteLine(德codeD);VAR DOC = CsQuery.CQ.CreateDocument(德codeD);VAR第= doc.Select(强)联盟(doc.Select(BR))。VAR标签=新的List< KeyValuePair<字符串,字符串>>();
变种计数器= 0;的foreach(在第VAR元素)
{
    HttpUtility.HtmlEn code(element.OuterHTML)使用.dump();
    VAR键=---+专柜+---;
    VAR值= HttpUtility.HtmlDe code(element.OuterHTML);
    对VAR =新KeyValuePair<字符串,字符串>(键,值);    element.OuterHTML =键;
    tags.Add(对);
    反++;
}VAR finalstring = HttpUtility.HtmlEn code(doc.Document.Body.InnerHTML);
finalstring.Dump();的foreach(在标签VAR元素)
{
finalstring = finalstring.Replace(element.Key,element.Value);
}Console.WriteLine(finalstring);

I have a large htmlencoded string and i want decode only specific whitelisted html tags.

Is there a way to do this in c#, WebUtility.HtmlDecode() decodes everything.

`I am looking for an implementaiton of DecodeSpecificTags() that will pass below test.

    [Test]
    public void DecodeSpecificTags_SimpleInput_True()
    {
        string input = "<span>i am <strong color=blue>very</strong> big <br>man.</span>";
        string output = "&lt;span&gt;i am <strong color=blue>very</strong> big <br>man.&lt;/span&gt;";
        List<string> whiteList = new List<string>(){ "strong","br" } ;

        Assert.IsTrue(DecodeSpecificTags(whiteList,input) == output);
    }`
解决方案

A better approach could be to use some html parser like Agilitypack or csquery or Nsoup to find specific elements and decode it in a loop.

check this for links and examples of parsers

Check It, i did it using csquery :

string input = "&lt;span&gt;i am &lt;strong color=blue&gt;very&lt;/strong&gt; big &lt;br&gt;man.&lt;/span&gt;";
string output = "&lt;span&gt;i am <strong color=blue>very</strong> big <br>man.&lt;/span&gt;";

var decoded = HttpUtility.HtmlDecode(output);
var encoded =input ; //  HttpUtility.HtmlEncode(decoded);

Console.WriteLine(encoded);
Console.WriteLine(decoded);

var doc=CsQuery.CQ.CreateDocument(decoded);

var paras=doc.Select("strong").Union(doc.Select ("br")) ;

var tags=new List<KeyValuePair<string, string>>();
var counter=0;

foreach (var element in paras)
{
    HttpUtility.HtmlEncode(element.OuterHTML).Dump();
    var key ="---" + counter + "---";
    var value= HttpUtility.HtmlDecode(element.OuterHTML);
    var pair= new KeyValuePair<String,String>(key,value);

    element.OuterHTML = key ;
    tags.Add(pair);
    counter++;
}

var finalstring= HttpUtility.HtmlEncode(doc.Document.Body.InnerHTML);
finalstring.Dump();

foreach (var element in tags)
{
finalstring=finalstring.Replace(element.Key,element.Value);
}

Console.WriteLine(finalstring);

这篇关于C#HtmlDe code特定的标签只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!

10-28 13:24