错误在webbrowser中获取数据 [英] Error get data in webbrowser

问题描述

现在有一个表单和一个webbrowser我想检索webbrowser上显示的数据必须做什么？



Div标签：

 <   div     id   =  divTop   >  
 <   div     id   =  text-conent   
                 style   = <跨度class =code-keyword> width：500px; 
 float：right;   >  
 <   / div  >  
 < span class =code-keyword><   div     id   =  grid  
                样式  =  margin-删除505px; 
身高：700px;   >  
 <   / div  >  
 < span class =code-keyword><   / div  >  
 

代码从webbrowser获取数据：

 HtmlAgilityPack.HtmlDocument doc; 
  string 文本
 
 doc =（HtmlAgilityPack.HtmlDocument）webBrowser1。
 Document。
 DomDocument; 
 texts = doc。 DocumentNode.SelectSingleNode（
   // div [@ class ='text-conent'] / p] ）。InnerText; 
 richTextBox1.Text =文本; 

错误：

无法将类型为mshtml.HTMLDocumentClass的COM对象强制转换为类类型HtmlAgilityPack.HtmlDocument。表示COM组件的类型实例不能转换为不代表COM组件的类型;但是只要基础COM组件支持IID的QueryInterface调用，它们就可以转换为接口



我必须如何在正确的webbrowser

解决方案

HtmlAgilityPack.HtmlDocument与mshtml.HTMLDocumentClass不兼容。在代码的某处，你可能会将webBrowser1指向一个文件，你要从中提取divtext-conent的内部文本（你确定要拼写吗？）。



我建议您按照我在 SiteMapper工具 [< a href =http://www.codeproject.com/Articles/786768/SiteMapper-Tooltarget =_ blank> ^ ]

 HAP.HtmlDocument web_page =  new  HAP.HtmlDocument（）; 
 
 尝试 
 {
 WebRequest web_request; 
 WebResponse web_response; 
 
 web_request = WebRequest.Create（uri.AbsoluteUri）; 
 web_response = web_request.GetResponse（）; 
 
 使用（Stream stream = web_response。
 GetResponseStream（））
 {
 web_page.Load（流）; 
} 
} 
  catch （WebException we）
 {
 node.Broken = 真; 
 继续; 
} 
 

只需使用HtmlAgilityPack Load方法即可。我建议你永远不要使用mshtml.HTMLDocumentClass。



一旦你在web_page中有了HTML，就可以像你现在一样提取div内部文本。

have a form and one webbrowser now I want to retrieve data displayed on the webbrowser must do?

Div Tags:

<div id="divTop" >
  <div id="text-conent"
       style="width: 500px;
              float: right;" >
  </div>
  <div id="grid"
       style="margin-removed 505px;
              height: 700px;" >
  </div>
</div>

Code get data from webbrowser:

HtmlAgilityPack.HtmlDocument doc;
string                       texts

doc = ( HtmlAgilityPack.HtmlDocument ) webBrowser1.
                                       Document.
                                       DomDocument;
texts = doc.DocumentNode.SelectSingleNode (
            "//div[@class='text-conent']/p]").InnerText;
richTextBox1.Text = texts;

Error:
Unable to cast COM object of type 'mshtml.HTMLDocumentClass' to class type 'HtmlAgilityPack.HtmlDocument'. Instances of types that represent COM components cannot be cast to types that do not represent COM components; however they can be cast to interfaces as long as the underlying COM component supports QueryInterface calls for the IID

I have to how to get the data in the correct webbrowser

解决方案

HtmlAgilityPack.HtmlDocument is not compatible with mshtml.HTMLDocumentClass. Somewhere in your code, you probably point webBrowser1 to a file from which you want to extract the inner text of the div "text-conent" (are you sure of the spelling?).

I'd suggest that you follow the process that I used in SiteMapper Tool[^]

HAP.HtmlDocument  web_page = new HAP.HtmlDocument ( );

try
    {
    WebRequest  web_request;
    WebResponse web_response;

    web_request = WebRequest.Create ( uri.AbsoluteUri );
    web_response = web_request.GetResponse ( );

    using ( Stream stream = web_response.
                            GetResponseStream ( ) )
        {
        web_page.Load ( stream );
        }
    }
catch ( WebException we )
    {
    node.Broken = true;
    continue;
    }

Simply use the HtmlAgilityPack Load method. I suggest that you never use the mshtml.HTMLDocumentClass.

Once that you have the HTML in web_page, you can extract the div inner text as you are currently doing.

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