CEFSHARP - ChromiumWebBrowser 获取 table 行单元格值

CEFSHARP - ChromiumWebBrowser on get table row cell values

我解决了大部分问题,但找不到其中一个问题的解决方案。 以前,我使用 Windows WebBrowser 并在经销商面板的查询屏幕上获得 table 结果。像这样;

foreach (HtmlElement htmlobj in webBrowser1.Document.GetElementsByTagName("Table"))
 {
     if (htmlobj.GetAttribute("className") == "table table-striped")
     {
          foreach (HtmlElement tr in htmlobj.GetElementsByTagName("tbody"))
          {
               foreach (HtmlElement td in tr.Children)
              {
                    string s0 =  td.Children[0].InnerText;
                    string s1 =  td.Children[1].InnerText;
               }
          }
     }
}

如何使用 ChromiumWebBrowser 执行此操作?

非常感谢您的帮助...^_^

这可以在 CefSharp 中使用 EvaluateScriptAsync 实现,方法是执行 JavaScript 找到 table 的 td 元素并将它们 return 作为数组,C# 将接收为 List<object>

如果您不知道,您通常必须等到页面的 MainFrame 加载后才能执行任何 JavaScript,您可以像这样实现:

//...
ChromiumWebBrowser browser = new ChromiumWebBrowser("https://example.com"); // <- Your URL there

browser.FrameLoadEnd += (sender, args) =>
{
  // Wait for the MainFrame to finish loading
  if(args.Frame.IsMain)
      GetTable(); // method to call that executes JavaScript, etc
}

More information about when you can start executing JavaScript.

现在,这是我为 EvaluateScriptAsync 到 return 和 tdinnerText 编写的 C# 代码:

// assuming "browser" is the ChromiumWebBrowser and you're ready to start executing JavaScript (see above code)
private void GetTable ()
{
    const string script = @"(function(){
        let table = document.querySelector('table.table.table-striped'); // <table class='table table-striped'>
        let td = table.getElementsByTagName('td');
        return [ td[0].innerText, td[1].innerText ];
    })();";

    browser.GetMainFrame().EvaluateScriptAsync(script).ContinueWith(x =>
    {
        var response = x.Result;

        if (response.Success && response.Result != null)
        {
            // We cast values as CefSharp wouldn't know what to expect
            List<object> jsResult = (List<object>)response.Result;

            string s1 = (string)jsResult[0]; // td[0].innerText
            string s2 = (string)jsResult[1]; // td[1].innerText

            Console.WriteLine("s1: " + s1);
            Console.WriteLine("s2: " + s2);
            // In my example HTML page, it will output:
            // s1: This is 1st
            // s2: This is 2nd
        }
    });
}

我做了这个 HTML 例子来测试它,因为你没有提供:

<table class="table table-striped">
    <tr>
        <th>One</th>
        <th>Two</th>
    </tr>
    <tr>
        <td>This is 1st</td>
        <td>This is 2nd</td>
    </tr>
</table>