VB.NET Webbrowser，htmlelement 通过没有 ID 的元素获取文本框

Question

使用下面的代码我登录到一个网站，然后我需要获取图片中突出显示的文本框。但是，文本框框没有 id。我怎样才能进入文本框以自动输入信息。Google Inspection of the textbox element

Public 子 start_processing()

webBrowser1.Navigate("login to website passing credentials")

Do Until webBrowser1.ReadyState = WebBrowserReadyState.Complete
    Application.DoEvents()
Loop

webBrowser1.Navigate("https://secure.tmhp.com/TexMedConnect/EV/Default.aspx?pn=usercontrols/AcuteCare/EligibilityVerification")

Do Until webBrowser1.ReadyState = WebBrowserReadyState.Complete
    Application.DoEvents()
Loop

WebBrowser1.Document.GetElementById("fdosDatePicker").SetAttribute("Eligibility From Date", "11/22/2017")

'Also have been trying to get this to work but still cannot establish the input box

Dim allelements As HtmlElementCollection = webBrowser1.Document.All
For Each webpageelement As HtmlElement In allelements
    If webpageelement.GetAttribute("class") = "igte_TMCEditInContainer igte_TMCEditInContianer" Then
        MessageBox.Show("in if")
        webpageelement.SetAttribute("value", "example")
    End If
Next

end sub

Answer 1

或多或少你在做什么。

你可以解析你WebBrowser.Document中的元素，然后设置那些你关心的人。

这里我假设有 1 个或多个表单，其中有一个提交按钮。
这是标准。如果您的情况有所不同，可以轻松调整。

Dim _found As Boolean = False

If webBrowser1.Document.Forms.Count > 0 Then
   For Each _form As HtmlElement In _htmlpage.Forms

      'Get all <input> elements in the current Form
      Dim _inputs As HtmlElementCollection = _form.GetElementsByTagName("INPUT")

      'Start from the last element of the collection
      For x As Integer = _inputs.Count - 1 To 0 Step -1

         'A submit element has been found, so look for the "wanted" element
         If _inputs(x).GetAttribute("type") = "submit" Then
            For Each _input As HtmlElement In _inputs

              'When found, set its new value
               If _input.GetAttribute("class") = "igte_TMCEditInContainer" Then
                  _input.SetAttribute("value", "example")
                  _found = True
                  Exit For
               End If
            Next
            Exit For
         End If
      Next
      If _found = True Then Exit For
   Next
End If

VB.NET Webbrowser，htmlelement 通过没有 ID 的元素获取文本框

VB.NET Webbrowser, htmlelement getting a textbox by element that has no ID

vb.net

webbrowser-control