如何在ASPX网站的下拉列表中选择特定项目 [英] How to select an specific item on a drop down list on ASPX site
问题描述
我希望它就像用户单击牙科一样。但是，当我运行以下代码时，没有任何反应。
我希望它就像用户单击牙科一样。但是，当我运行以下代码时，没有任何反应。
我希望它就像用户单击牙科一样。但是，当我运行以下代码时，什么也没发生。
I want it to be as if the user had clicked on "Dental." However, when I run the following code, nothing happens. I want it to be as if the user had clicked on "Dental." However, when I run the following code, nothing happens. I want it to be as if the user had clicked on "Dental." However, when I run the following code, nothing happens.
'Public Sub IE_Search_and_Extract()
'Dim URL As String
'Dim IE As SHDocVw.InternetExplorer
'Dim HTMLdoc As HTMLDocument
'Dim response As String
'response = MsgBox("Login ", vbYesNo + vbQuestion, "login")
'If response = vbYes Then
' URL = " "
'Else
'End If
'Set IE = Get_IE_Window(URL)
'If IE Is Nothing Then
' Set IE = New SHDocVw.InternetExplorer
'End If
' With IE
' SetForegroundWindow .hwnd
' .navigate URL
' .Visible = True
' While .Busy Or .readyState <> READYSTATE_COMPLETE
' DoEvents
'Wend
' '.document.getElementById("btnLogin").Click
' ' While .Busy Or .readyState <> READYSTATE_COMPLETE
' DoEvents
' Wend
Application.Wait (Now + TimeValue("0:00:5"))
Set HTMLdoc = .document
End With
'Dim post As Object, elem As Object
'For Each post In HTMLdoc.getElementsByClassName("cboItem")
' If InStr(post.innerText, "Dental") > 0 Then post.Click: Exit For
'Next post
'End Sub
推荐答案
此特定网页未使用< select> 和< option> ; 。这向我暗示了他们正在使用一些自定义JavaScript来模拟下拉列表，其中使用了图示的< div> 和< span> 元素。此外，他们使用 onselect 而不是 onclick 来触发事件处理程序。
This particular web page isn't using <select> and <option>. That suggests to me that they are using some custom JavaScript to simulate a drop-down list using the illustrated <div> and <span> elements. In addition, they are using onselect rather than onclick to trigger event handlers.
我无法复制您的测试用例。但是，我确实做了一个自己的测试用例，并且我认为它是可行的。简而言之，将 post.Click 替换为 post.onselect 。您的代码的问题在于，它试图触发目标< span> onclick 处理程序$ c>！
I can't replicate your test case. However, I did make a test case of my own, and I think it works. In short, replace post.Click with post.onselect. The problem with your code was that it was trying to trigger an onclick handler that didn't exist on the target <span>!
<html>
<head>
<script type="text/javascript">
function clk() { alert('Dental clicked'); } // *** So I could see if Click had an effect
function sel() { alert('Dental selected'); } // *** Simulate the given testcase
</script>
</head>
<body>
<div class="cboGroupGrid">
<span class="cboItem" option="0"></span>
<span class="cboItem" option="1" onselect="sel();" onclick="clk();">Dental</span>
<span class="cboItem" option="2">Health</span>
<span class="cboItem" option="3">Unknown Product</span>
</div>
</body></html>
VBA
在以下代码中， '''是我注释掉的东西，因为我没有它们，而且按照我的理解，它们对于任务不是必需的。
VBA
In the code below, ''' are things I commented out because I didn't have them and they weren't essential to the task as I understand it.
Public Sub IE_Search_and_Extract()
Dim URL As String
Dim IE As SHDocVw.InternetExplorer
Dim HTMLdoc As HTMLDocument
Dim response As String
'''response = MsgBox("Login ", vbYesNo + vbQuestion, "login")
'''If response = vbYes Then
''' URL = " "
'''Else
'''End If
URL = "prashant.htm" ' ** Local testcase
'''Set IE = Get_IE_Window(URL) ' ** I don't have the code for this function
'''If IE Is Nothing Then
Set IE = New SHDocVw.InternetExplorer
'''End If
With IE
'''SetForegroundWindow .Hwnd ' ** I don't have this function
.navigate URL
.Visible = True
While .Busy Or .readyState <> READYSTATE_COMPLETE
DoEvents
Wend
'.document.getElementById("btnLogin").Click
' While .Busy Or .readyState <> READYSTATE_COMPLETE
' DoEvents
' Wend
'Application.Wait (Now + TimeValue("0:00:5"))
Set HTMLdoc = .document
End With
Dim post As Object, elem As Object
For Each post In HTMLdoc.getElementsByClassName("cboItem")
If InStr(post.innerText, "Dental") > 0 Then ' ** Use a block If, not inline.
'post.Click ' ** This does work, and triggers clk()
post.onselect ' ** This triggers sel()
Exit For
End If
Next post
End Sub
风格建议：如果某件物品中有多个物品然后或 Else 块，请始终使用多行形式。这样，对于：是否结束 Then 块就不会产生歧义。
Style suggestion: If you have more than one thing in a Then or Else block, always use the multiline form. That way there's no ambiguity about whether the : ends the Then block or not.
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