blog/xamarin-hap-withxpath : XamarinとHtmlAgilityPack

difference.cs

// LINQ
var items = htmlDoc.DocumentNode.Descendants("div")
			.Where(e => e.GetAttributeValue("class", "") == "resultItem");
SearchResults = items.Select(r => {
string kind=r.Descendants("div").Where(e=>e.GetAttributeValue("class", "")=="resultKind")
	.FirstOrDefault()?.InnerText;
string name=r.Descendants("div").Where(e=>e.GetAttributeValue("class","")=="resultName")
	.FirstOrDefault()?.InnerText;

// XPath
doc.DocumentNode.SelectNodes("//div[@class='resultItem']")?.Select(r =>{
string kind = r.SelectSingleNode("div/div[@class='resultKind']")?.InnerText;
string name = r.SelectSingleNode("div/div[@class='resultName']")?.InnerText; 
});

// CSS Selector(未実装)
doc.DocumentNode.CSSセレクタメソッド("div.resultItem")?.Select(r =>{
string kind = r.CSSセレクタメソッド("div div.resultKind")?.InnerText;
string name = r.CSSセレクタメソッド("div div.resultName")?.InnerText; 
})

search.cs

public class TypeSearchResult
{
	public Uri Uri { get; set; }
	public Uri Image { get; set; }
	public string Kind { get; set; }
	public string Name { get; set; }
	public string FullName { get; set; }
}

public async Task<IEnumerable<TypeSearchResult>> Search(string symbol)
{
	HtmlWeb web = new HtmlWeb();
	//Reference SourceのWebサイトから検索
	HtmlDocument doc = await web.LoadFromWebAsync("https://referencesource.microsoft.com/api/symbols/?symbol=" + symbol);
	return doc.DocumentNode.SelectNodes("//div[@class='resultItem']")?.Select(r =>
	{
		string kind = r.SelectSingleNode("div/div[@class='resultKind']")?.InnerText;
		string name = r.SelectSingleNode("div/div[@class='resultName']")?.InnerText;
		return new TypeSearchResult()
		{
			Uri = new Uri("https://referencesource.microsoft.com" + r.ParentNode.GetAttributeValue("href", "")),
			Image = new Uri("https://referencesource.microsoft.com" +
							r.SelectSingleNode("div[@class='resultLine']/img")?.GetAttributeValue("src", "")),
			Kind = kind,
			Name = name,
			FullName = r.SelectSingleNode("div[@class='resultDescription']")?.InnerText
		};
	});
}