如何用VB.net直接操作Internet Explorer_Server(IES)窗口里的网页元素

Question

能不能用IES构造HtmlDocument对象?就像WebBrowser.Document对象一样.
具体怎么实现,主要是想像用WebBrowser.Document对象那样操作IE浏览器里的网页元素,而不使用内置浏览器控件.

Answer 1

引用com
Microsoft internet controls
microsoft html object library

Dim SWs As New SHDocVw.ShellWindows
        Dim ie As SHDocVw.InternetExplorer
       
        For Each ie In SWs
            Dim doc As mshtml.HTMLDocument
            doc = TryCast(ie.Document, mshtml.HTMLDocument)
            If Not doc Is Nothing Then
                MsgBox(doc.body.innerHTML)
            End If
        Next

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Answer 2

    Function IESHTMLDocument(ByVal Hwnd As Integer) As HtmlDocument
        Dim SWs As New SHDocVw.ShellWindows
        Dim ie As SHDocVw.InternetExplorer
        For Each ie In SWs
            Dim doc As mshtml.HTMLDocument
            doc = TryCast(ie.Document, mshtml.HTMLDocument)
            If ie.HWND = Hwnd And doc IsNot Nothing Then
                Return doc
            End If
        Next
        Return Nothing
    End Function
使用以上代码时出现异常:
无法将类型为“mshtml.HTMLDocumentClass”的 COM 对象强制转换为类类型“System.Windows.Forms.HtmlDocument”。表示 COM 组件的类型实例不能强制转换为不表示 COM 组件的类型；不过，只要基础 COM 组件支持对接口 IID 的 QueryInterface 调用，就能将这些实例强制转换为接口。
如何返回HTMLDocument?

Answer 3

Function IESHTMLDocument(ByVal Hwnd As Integer) As  mshtml.HTMLDocument

只能用com对象

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Answer 4

mshtml.HTMLDocument如何遍历所有元素,包括属性?
mshtml.HTMLDocument.all只能取到length属性.

Answer 5

Dim ele As mshtml.IHTMLElement

For Each ele In doc.all

Console.WriteLine(ele.id)

Next

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Answer 6

问题已解决,但像标签窗口(IE7和IE8)窗口按窗口句柄取对象时是不是可以做成一个对象数组呢?