Question

我一直在尝试使用此代码在html / ajax中按类读取元素，因为知道GetElementByClass不是webBrowser.Document中的选项。我似乎无法获得返回值然后调用该成员。有解决方法吗？

参考文献： Getting HTMLElements by Class Name

示例：

<span class="example">(<a href="http://www.test.com/folder/remote/api?=test" onclick=" return do_ajax('popup_fodder', 'remote/api?=test', 1, 1, 0, 0); return false; " class="example">test</a>)</span>

示例代码：

   HtmlElementCollection theElementCollection = default(HtmlElementCollection);
   theElementCollection = webBrowser1.Document.GetElementsByTagName("span");
   foreach (HtmlElement curElement in theElementCollection)
   {
        //If curElement.GetAttribute("class").ToString = "example"  It doesn't work.  
        // This should be the work around.
        if (curElement.OuterHtml.Contains("example"))
        {
            MessageBox.Show(curElement.GetAttribute("InnerText")); // Doesn't even fire.
            // InvokeMember(test) after class is found.
        }
    }

Answer 1

我承认这不是很直观，但您需要使用GetAttribute("className")代替GetAttribute("class")

HtmlElementCollection theElementCollection = default(HtmlElementCollection);
theElementCollection = webBrowser1.Document.GetElementsByTagName("span");
foreach (HtmlElement curElement in theElementCollection)
{
    if (curElement.GetAttribute("className").ToString() == "example")
    {
        MessageBox.Show(curElement.GetAttribute("InnerText")); // Do something you want
    }
}

Answer 2

这是我如何使用webbrowser控件查找特定于类的元素并调用单击内部链接的示例。

简化＆gt;

   foreach (HtmlElement item in webBrowser1.Document.GetElementsByTagName("li"))
        {
            // use contains() if the class attribute is 
            // class="page_item page-item-218 current_page_item"
            //this to be more on spot! >> if (item.OuterHtml.Contains("class=\"page_item"))
            // or
            if (item.OuterHtml.Contains("page_item"))
            {
                foreach (HtmlElement childItem in item.Children)
                {
                    if (childItem.TagName == "A")
                    {
                        //Click the link/Current element
                        childItem.InvokeMember("Click");
                        break;
                    }
                }
                break;
            }
        }

这种方式有效吗？..

这对我有用。

或者我误解了你的问题？

Answer 3

为什么不使用qjuery的选择器引擎呢？而且，你期望messagebox.show出现在哪里？

Answer 4

Dim HtmlElementcolltwo As HtmlElementCollection = WebBrowser1.Document.GetElementsByTagName("button")
        For Each eleme As HtmlElement In HtmlElementcolltwo
            ' Check the attributtes you want
            If eleme.GetAttribute("className") = "derrt_submit feed-zed-bff" Then
                'Check even the text if you want
                ' If elem.InnerText = "Sign In" Then
                'Invoke your event
                eleme.InvokeMember("click")
                'End If
            End If
        Next

这也适用于而不是使用＆＃34; class＆＃34;使用＆＃34; className＆＃34;

如何通过GetElementByClass选择一个类并以编程方式单击它

4 个答案: