How to get specific words/numbers from a website?

Question

I want to get the stats of a player in a game, and show these in my application. The stats I need are put online on a website(account.xxx.com/player/username).

How to I grab (for example) the kill/death ratio from that website?

Answer 1

Screen scrape the page into code, then walk the resulting markup to get the values you need. E.g. regular expression, DOM parsing, Linq to Xml etc, ...

"Screen scraping" is the act of calling a page into code into a variable, rather than rendering onto a browser. Once you have the page in code as a variable you can manipulate it however you desire.

Answer 2

The first thing I must stress is:

Make sure it is not against the ToS of the website for you to use their data in this manner.

So, for example:

// 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);
};

As others have suggested, you should have a look at how to ask a good question. It is generally considered bad etiquette to ask people to solve your problem for you without demonstrating what you have attempted yourself.

Answer 3

use the HtmlAgilityPack to pull the info you need from the html