powershell 中的 html 对象错误

Question

所以我在 powershell 中做了一些 IE 自动化。

这是我的代码:

$text = "ctl00`$ContentPlaceHolder1`$Login1`$UserName"
$ie = New-Object -ComObject internetexplorer.application
$ie.visible = $true
$ie.navigate($url);
while ($ie.Busy -eq $true)
{

Start-Sleep -Milliseconds 1000;
} 

Write-Host -ForegroundColor Green "Attemptin to login to website."
$ie.Document.getElementById("ctl00`$ContentPlaceHolder1`$Login1`$UserName").value = $username
$ie.Document.getElementById("ctl00`$ContentPlaceHolder1`$Login1`$Password").value = $password
$ie.Document.getElementById("ctl00`$ContentPlaceHolder1`$Login1`$LoginButton").Click()

#while ($ie.Busy -eq $true) 
#{ 
Start-Sleep -Milliseconds 5000; 
#}
$ie.Document.getElementById("ctl00`$ContentPlaceHolder1`$txtAgentID").value = "BKR00822"

我遇到的问题是这一行:

$ie.Document.getElementById("ctl00`$ContentPlaceHolder1`$ddlAgentID").value = "BKR00822"

该行指的是下拉列表。

出于某种原因，它不接受任何属性、值或选择。

这是html的来源:

        <div id="ctl00_ContentPlaceHolder1_pnlOverrideAgentIDEnter">

            <div class="override_agent_text_container">
                Please override the Agent ID below to view policies of another agent.
            </div>
            <table cellpadding="0" cellspacing="0" border="0" class="override_agent_controls_container">
                <tr>
                    <td width="10px">Agent&nbsp;Name:&nbsp;
                    </td>
                    <td>
                        <select name="ctl00$ContentPlaceHolder1$ddlAgentID" onchange="javascript:setTimeout(&#39;__doPostBack(\&#39;ctl00$ContentPlaceHolder1$ddlAgentID\&#39;,\&#39;\&#39;)&#39;, 0)" id="ctl00_ContentPlaceHolder1_ddlAgentID">
                        <option selected="selected" value="">[Select...]</option>
                        <option value="BKR00372">1st National Bank</option>
                        <option value="BKR00012">21ST CENTURY INSURANCE &amp; REINSURANCE BROKERS LIMITED</option>
                        <option value="BKR00613">21ST CENTURY INSURANCE &amp; REINSURANCE BROKERS LIMITED</option>
                        <option value="BKR00824">345-815-2126</option>
                        <option value="BKR00022">ACE INSURANCE BROKERS LIMITED</option>
                        <option value="BKR00783">Agostini Insurance Brokers (St. Lucia) Ltd</option>
                        <option value="BKR00032">AGOSTINI INSURANCE BROKERS LIMITED</option>
                        <option value="BKR00623">AGOSTINI INSURANCE BROKERS LIMITED</option>
                        <option value="BKR00633">AGOSTINI INSURANCE BROKERS LIMITED</option>
                        <option value="BKR00042">AMALGAMATED INSURANCE BROKERS LIMITED</option>
                        <option value="BKR00643">AMALGAMATED INSURANCE BROKERS LIMITED</option>

这是我遇到的错误。大约有 200 个下拉项目。我要找的东西在里面，我没有复制过来:

The property 'value' cannot be found on this object. Verify that the property exists and can be set.
At C:\Users\Sabrin\Desktop\massy-test-web-prog.ps1:25 char:1
+ $ie.Document.getElementById("ctl00`$ContentPlaceHolder1`$ddlAgentID").value = "1 ...
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
   + FullyQualifiedErrorId : PropertyNotFound

感谢您的帮助!

Answer 1

我认为你的问题是时间问题。根据我在 IE 自动化方面的经验，有很多这样的东西。

在等待 IE 页面加载时，这段代码最适合我:

While ($ie.ReadyState -ne 4)
{
    write-host "Session State: $($ie.ReadyState)"
    Start-Sleep -Milliseconds 100
}
Start-Sleep -Milliseconds 200 # extra buffer 

$ie.Busy 不可靠。

此外，

要在下拉列表中选择一个项目，您可能应该使用 selectedIndex 属性:

$ie.Document.getElementById("list").selectedIndex = 69 
$ie.Document.getElementById("list").FireEvent("onchange")