This documentation is archived and is not being maintained.

HtmlElementCollection Class

Defines a collection of HtmlElement objects.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

Public NotInheritable Class HtmlElementCollection _
	Implements ICollection, IEnumerable
Dim instance As HtmlElementCollection

The following code example uses HtmlElementCollection objects to print out a textual representation of the Document Object Model (DOM) of a page.

Private Sub PrintDomBegin()
    If (WebBrowser1.Document IsNot Nothing) Then 
        Dim ElemColl As HtmlElementCollection

        Dim Doc As HtmlDocument = WebBrowser1.Document
        If (Not (Doc Is Nothing)) Then
            ElemColl = Doc.GetElementsByTagName("HTML")
            Dim Str As String = PrintDom(ElemColl, New System.Text.StringBuilder(), 0)

            WebBrowser1.DocumentText = Str
        End If 
    End If 
End Sub 

Private Function PrintDom(ByVal ElemColl As HtmlElementCollection, ByRef ReturnStr As System.Text.StringBuilder, ByVal Depth As Integer) As String 
    Dim Str As New System.Text.StringBuilder()

    For Each Elem As HtmlElement In ElemColl
        Dim ElemName As String

        ElemName = Elem.GetAttribute("ID")
        If (ElemName Is Nothing Or ElemName.Length = 0) Then
            ElemName = Elem.GetAttribute("name")
            If (ElemName Is Nothing Or ElemName.Length = 0) Then
                ElemName = "<no name>" 
            End If 
        End If

        Str.Append(CChar(" "), Depth * 4)
        Str.Append(ElemName & ": " & Elem.TagName & "(Level " & Depth & ")")

        If (Elem.CanHaveChildren) Then
            PrintDom(Elem.Children, ReturnStr, Depth + 1)
        End If

        Str.Remove(0, Str.Length)

    PrintDom = ReturnStr.ToString()
End Function


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0