/// <summary>
/// 在 CSS 中，选择器是一种模式，用于选择需要添加样式的元素。
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn_Query_Click(object sender, RoutedEventArgs e)
{
TextRange tr = new TextRange(rbox_Input.Document.ContentStart, rbox_Input.Document.ContentEnd);
var selector = this.tbox_CSSSelector.Text.Trim();
var html = tr.Text;
if (string.IsNullOrEmpty(selector))
{
EMessageBox.Show("请输入CSS选择器");
return;
}
angleSharpHelper.Init(html);
var angleSharpObj = angleSharpHelper.CSSQuery(selector);
if (angleSharpObj != null)
{
//目前只输出一个结果
//过完年再搞 ╮(－_－)╭
this.rbox_Output.Document = new FlowDocument(new Paragraph(new Run(angleSharpObj.OuterHtml)));
}
else
{
this.rbox_Output.Document = new FlowDocument(new Paragraph(new Run("未匹配到结果")));
}
}
private Good GetGood(string source)
{
try
{
if (string.IsNullOrEmpty(source))
{
return(null);
}
//AngleSharp貌似是不支持中文 有乱码啊
Good good = new Good();
angleSharpHelper.Init(source);
//大部分是使用h1标签做为商品标题
////如果h1没有找到，用name去找
//忽略大小写
var goodNameElement = angleSharpHelper.CSSQueryRange("h1", "[class~=name i]", "[id~=name i]");
//评价数/销量
//Func<AngleSharp.Dom.IElement, bool> predicate = x => x.ClassName.ToLower().Contains("comment") || x.ClassName.ToLower().Contains("pinglun");
var salesElement = angleSharpHelper.CSSQueryRange("[class~=comment i]", "[id~=pinglun i]", "[class~=pinglun i]");
//价格
var priceElement = angleSharpHelper.CSSQueryRange("[class~=price i]", "[id~=price i]");
//商品详情一般会包含detail
var goodDetailElement = angleSharpHelper.CSSQueryRange("[id~=detail i]", "[class~=detail i]");
//评论列表
//这里一般需要执行动态请求
//用抓包工具分析一下就出来的，一般返回json数据
//由于和评论数一样 都是用的comment
//这里需要定制抓取 就不做实现了
good.Name = goodNameElement?.TextContent;
good.Sales = RegexUtil.ExtractDigit(salesElement?.TextContent);
good.Price = RegexUtil.ExtractDigit(priceElement?.TextContent);
good.DetailContent = goodDetailElement?.TextContent;
good.DetailImageList = goodDetailElement?.QuerySelectorAll("img").Select(x => x.Attributes["src"]?.Value).ToList();
return(good);
}
catch
{
return(null);
}
}
private Task ExtractLink(string source)
{
return(Task.Run(() => {
AngleSharpHelper helper = new AngleSharpHelper();
helper.Init(source);
var tagAList = helper.CSSQueryAll("a");
foreach (var item in tagAList)
{
var url = item.Attributes["href"]?.Value;
if (string.IsNullOrEmpty(url) == false)
{
if (RegexUtil.IsUrl(url) == true)
{
//TODO 需要使用分组构造 排除文件路径 如http://abc.com/test.exe 今天太累了 想不动了
AppendText(url);
queue.Enqueue(url);
}
}
}
}));
}