如何从C＃中的HTML文件中获取信息？ [英] How to take information from HTML file in C#?

问题描述

你好！



我想从span class =c和class =c2创建一个字符串a [4]。 a [0] = class =c; a [1] = 0; a [2] = class =c2。

此时我的字符串只包含[1]和[2]。请帮忙？



以下是html代码示例：

 <   div     class   =  a >  
 
 <   div     class   =  b >  
 <   span     class   =  c >  ... 
 <   / span  >  
 <   / div  >  
 
 
 <   div     class   =  b1 >  ... 
 <   / div  >  
 
 <   div     class   =  b2 >  ... 
 <  跨度 <跨度class =code-attribute>   class   =  c >  
 <   / span  >  
 <   / div  >  
 
 
 <   / div  >  

我尝试过：

  var  inner1 = doc.DocumentNode.SelectSingleNode（  // div [ @ class ='a']）; 
 
  var  nodes3 = inner1.SelectNodes（  // span [@ class ='c']）; 
 
  foreach （HtmlAgilityPack.HtmlNode item3  in  nodes3）
 { 
 shipping_flag [i4] = item3.InnerText; 
 
 
 shipping_array =（ string  []）shipping_flag.ToArray（）; 
 i4 ++; 
 
 
} 

解决方案

我会尽力帮助你，但我是一个很难解释你的解释和你的foreach块。

你想要达到什么目的？

将所有SPAN元素提取到一个数组中？

算一下吧？



编辑：

好​​吧，我想我明白了。我希望，至少:)

只是为了确定，你想得到这样的输出数组：

  string  [] shipping_array =  new   string  [] 
 {
   class =    c   ，
   0，
   class =   c2   ，
  null   //  为什么不定义这个项目？ 
}; 

似乎有点不合时宜nsistent，但是我不知道背景。

所以，我的下一个问题是：

*第三个数组元素中的'2'字符来自哪里？它是找到的'c'类的计数器？

*你没有定义第四个数组元素。为什么？短跨度之间有什么区别？



编辑：

尝试类似的东西：

  var  results =  new  List< string>（）; 
  var  divs = doc.DocumentNode.SelectNodes（  //格）; 
  foreach （ var  div  in  divs）
 results.Add（div.SelectNodes（  span [@ class ='c'] ）==  null ？  0 ：  class = \c\）; 

Hello!

I would like to create one string a[4] from span class="c" and class="c2". a[0] = class="c"; a[1] = 0; a[2] = class="c2".
At this time my string contains only a[1] and a[2]. Please, help?

Here is an example of html code:

<div class="a">

<div class="b">
<span class="c">...
</span>
</div>


<div class="b1">...
</div>

<div class="b2">...
<span class="c">
</span>
</div>


</div>

What I have tried:

var inner1 = doc.DocumentNode.SelectSingleNode("//div[@ class='a']");

var nodes3 = inner1.SelectNodes("//span[@ class='c']");

foreach (HtmlAgilityPack.HtmlNode item3 in nodes3)
                {
                    shipping_flag[i4] = item3.InnerText;
                   

                    shipping_array = (string[])shipping_flag.ToArray();
                    i4++;


                }

解决方案

I'll try to help you, however I'm a little puzzled about your explanation and your foreach block.
What do you like to achieve?
Extract all the SPAN elements into an array?
Count them?

EDIT:
Ok, i think I got it. I hope, at least :)
Just to be sure, are you like to get an output array like this:

string[] shipping_array = new string[]
{
    "class=""c""",
    "0",
    "class=""c2""",
    null //why did not you define this item?
};

It seems to be a little inconsistent, however I don't know the backgrounds.
So, my next questions are:
* From where comes the '2' character in the third array element? It is a counter of found 'c' classes?
* Do you not defined the fourth array element. Why? There is any difference between short spans?

EDIT:
Try something similar:

var results = new List<string>();
var divs = doc.DocumentNode.SelectNodes("//div");
foreach (var div in divs)
    results.Add(div.SelectNodes("span[@class='c']") == null ? "0" : "class=\"c\"");

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