Question

这里是网站上的代码html。

<span class="def">

to make something 

<a class="query" title="clear" href="http://dictionary.cambridge.org/dictionary/british/clear"></a>

 or 

<a class="query" title="easy" href="http://dictionary.cambridge.org/dictionary/british/easy"></a>

 to 

<a class="query" title="understand" href="http://dictionary.cambridge.org/dictionary/british/understand"></a>

 by 

<a class="query" title="describing" href="http://dictionary.cambridge.org/dictionary/british/describe"></a>

 or giving 

<a class="query" title="information" href="http://dictionary.cambridge.org/dictionary/british/information"></a>

 about it:

怎么做？我希望得到这样的结果：制作某种东西或通过或给予它

我有httpAgilityPack的代码。

string url = "http://dictionary.cambridge.org/dictionary/british/appeal";
        HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
        WebRequest request = WebRequest.Create(url);
        WebResponse response = await request.GetResponseAsync();
        StreamReader stream = new StreamReader(response.GetResponseStream());
        string content = await stream.ReadToEndAsync();

        List<string> list = new List<string>();

        foreach (...)
        {
           ...
        }

我希望每个人都能提供帮助。

Answer 1

private async void print_def(String uristring)
    {
        using (HttpClient client = new HttpClient())
        {
            //verify uri is a valid
            Uri outuri;
            if(Uri.TryCreate(uristring,UriKind.RelativeOrAbsolute,out outuri))
            {
                //try to get the site
                HttpResponseMessage response=new HttpResponseMessage();
                try
                {
                    response = await client.GetAsync(outuri);
                }
                catch (HttpRequestException exc)
                {
                    System.Diagnostics.Debug.WriteLine("Error geting Html from site");
                }

               //check if site returned success code 200
                if (response.IsSuccessStatusCode)
                {
                    String html = await response.Content.ReadAsStringAsync();
                    System.Diagnostics.Debug.WriteLine("succes");
                    HtmlDocument htmldoc = new HtmlDocument();
                    htmldoc.LoadHtml(html);

                    foreach (HtmlNode defnode in htmldoc.DocumentNode.Descendants("span").Where(spannode => spannode.Attributes.Contains("class")&&spannode.Attributes["class"].Value.Equals("def")))
                    {
                        System.Diagnostics.Debug.WriteLine(defnode.InnerText.ToString());
                        //put here whaterver you want to do with the text
                    }
                }
            }
        }
    }

你可以将这个功能复制粘贴到你的项目中，并传递你想要作为字符串抓取的网址。对我有用，希望能回答你的问题。

Http Agility Pack有什么问题

1 个答案: