试图在 VB.NET 中使用 getElementsByClass ..？
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Trying to use getElementsByClass in VB.NET..?
提问by Jordan ChillMcgee Ludgate
I keep getting this error when trying to implement getElementsByClassName..
尝试实现 getElementsByClassName 时，我不断收到此错误。
Error 1 'getElementsByClassName' is not a member of 'System.Windows.Forms.HtmlDocument'.
I'm trying to press a button on webbrowser1 by doing:
我试图通过执行以下操作来按下 webbrowser1 上的按钮：
WebBrowser1.Document.getElementsByClassName("search-button").InvokeMember("submit")
Any tips? Thanks!
有小费吗？谢谢！
回答by nkvu
I don't think that HtmlDocument, which you get out of the WebBrowser.Documentproperty has a getElementsByClassNamemethod you can invoke.
我不认为您从属性中获取的HtmlDocumentWebBrowser.Document具有getElementsByClassName您可以调用的方法。
I think your options are:
我认为你的选择是：
If you know the Id, you can call GetElementByIdand then
InvokeMemberagainst that, for example:WebBrowser1.Document.GetElementById("searchButtonId").InvokeMember("submit")If you know the tag name, you can call GetElementByTagNameand then iterate through this to find the element of the relevant class and then
Invoke Memberagainst that.If you look at the code sample, you'll see a
elem.GetAttribute("content")call - you'll probably want to do something similar but withelem.GetAttribute("class")and inspect what gets returned to make sure it's the class name you wantUse the Allproperty like has been referenced in another answer, but I think you have to iterate through and check each element using
GetAttributelike referenced in point (2)
如果您知道 Id，您可以调用GetElementById，然后
InvokeMember针对该 ID，例如：WebBrowser1.Document.GetElementById("searchButtonId").InvokeMember("submit")如果您知道标记名称，则可以调用GetElementByTagName，然后遍历它以找到相关类的元素，然后再
Invoke Member针对该元素进行迭代。如果您查看代码示例，您会看到一个
elem.GetAttribute("content")调用 - 您可能想做类似的事情，但elem.GetAttribute("class")检查返回的内容以确保它是您想要的类名使用All属性 like 已在另一个答案中引用，但我认为您必须迭代并使用
GetAttribute第(2)点中引用的类似元素检查每个元素
回答by IT Vlogs
This is my solution and can use:
这是我的解决方案，可以使用：
Dim theElementCollection As HtmlElementCollection = Nothing
theElementCollection = WebBrowser1.Document.GetElementsByTagName("input")
For Each curElement As HtmlElement In theElementCollection
If InStr(curElement.GetAttribute("classname").ToString, "search-button") Then
curElement.InvokeMember("Click")
Exit For
End If
Next
at GetAttribute("classname")use for class and GetAttribute("id")use for id
在GetAttribute("classname")使用类和GetAttribute("id")使用的ID
Test on VS2008 to VS2017 it working
在 VS2008 到 VS2017 上测试它工作
