如何從網站獲取特定的單詞/數字？

Question

我想獲得遊戲中玩家的屬性，並在我的應用程序中顯示這些屬性。 我需要的統計數據放在網站上（account.xxx.com/player/username）。

如何從該網站抓取（例如）殺/死率？

Answer 1

我必須強調的第一件事是：

確保它不反對爲您的網站使用其數據的ToS以這種方式。

因此，舉例來說：

// Store the URL of the website you are looking at. 
string path = "http://euw.op.gg/summoner/userName="; 
string userName = "froggen"; 
string url = path + userName; 
// Create a new WebClient to download the html page. 
using (WebClient client = new WebClient()) 
{ 
    // Download the html source code of the user page. 
    string html = client.DownloadString(url); 

    // Finding the kda depends on the website - you need to know what you are looking for. Have a look at the page source and see where the kda is stored. 
    // I've had a look at the source of my example and I know kda is stored in <span class="KDARatio">3.92:1</span>. 

    // You'll need a way to get that data out of the HTML - you might try to parse the file and traverse it. 
    // I've chosen Regex to match the data I'm looking for. 
    string pattern = @"<span class=""KDARatio"">\d+\.\d+"; 
    // I take the first string that matches my regex from the document. 
    string kdaString = Regex.Matches(html, pattern)[0].Value; 
    // I trim the data I don't need from it. 
    string substring = kdaString.Substring(kdaString.IndexOf('>') + 1); 
    // Then I can convert it into a double - giving me the x:1 kda ratio for this player. 
    double kda = double.Parse(substring); 
}; 

正如其他人的建議，你應該看看how to ask a good question。一般認爲，要求人們爲自己解決問題而沒有證明自己曾經嘗試過什麼，這通常被認爲是不禮貌的。

Answer 2

Screen scrape將頁面轉換爲代碼，然後遍歷結果標記以獲取所需的值。例如。正則表達式，DOM解析，Linq到Xml等，...

「屏幕抓取」是將頁面代碼調入變量而不是渲染到瀏覽器的行爲。一旦你將代碼中的頁面作爲一個變量，你可以根據需要操作它。

Answer 3

使用HtmlAgilityPack拉你從HTML需要的信息