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我的程序旨在搜索Amazon并从结果中提取数据位(如产品名称和价格)。Visual Basic - 从网页中提取文本
到目前为止,我的程序将用户输入的内容粘贴到txt_Search
并在页面上按下“Go”。这是迄今为止代码:
Private Sub btn_Search_Click(sender As Object, e As EventArgs) Handles btn_Search.Click
Dim SearchTerm As String
'Set SearchTerm as text input
SearchTerm = txt_Search.Text
'Identify the search text box
Dim AmazonElementCollection As HtmlElementCollection = web_Browser.Document.GetElementsByTagName("Input")
For Each curElement As HtmlElement In AmazonElementCollection
Dim searchtextbox As String = curElement.GetAttribute("id").ToString
If searchtextbox = "twotabsearchtextbox" Then
'Populate the search text box
curElement.SetAttribute("Value", searchterm)
End If
Next
'BUTTON CLICK: Search button
'<input type="submit" value="Go" class="nav-submit-input" title="Go">
For Each curElement As HtmlElement In AmazonElementCollection
'Find the Go button
If curElement.GetAttribute("value").Equals("Go") Then
'Function to click the button
curElement.InvokeMember("click")
End If
Next
所以当它这样做的所有叫web_Browser
的web浏览器对象的这一切工作正常。但是,如何将文本从第一个结果的网页中截取并放入文本框中。我希望将第一个结果的标题放入名为txt_Title
的文本框中。谢谢。
谢谢您的回复。我一直在努力研究如何使用处理程序以及在何处使用它。到目前为止,我已经在使用以下代码的模块中定义了事件:'Public Event DocumentCompleted As WebBrowserDocumentCompletedEventHandler' and using'Dim web_URL = web_Browser.Url AddHandler web_Browser,New WebBrowserDocumentCompletedEventHandler(AddressOf web_URL)''题。但是,它返回“'AddressOf'操作数必须是方法的名称(不带圆括号)”。我哪里错了? –
我觉得应该是AddHandler的web_Browser.DocumentCompleted,AddressOf myDocumentCompletedMethod – GTG