HtmlElement.Parent Property (System.Windows.Forms)

Parent Property

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Microsoft Visual Studio 2010/.NET Framework 4

Other versions are also available for the following:

.NET Framework Class Library

HtmlElement..::.Parent Property

Gets the current element's parent element.

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

Syntax

Visual Basic

Public ReadOnly Property Parent As HtmlElement

public HtmlElement Parent { get; }

Visual C++

public:
property HtmlElement^ Parent {
    HtmlElement^ get ();
}

member Parent : HtmlElement

Property Value

Type: System.Windows.Forms..::.HtmlElement
The element above the current element in the HTML document's hierarchy.

Remarks

The Parent property enables discovery of an element's context. It is most useful inside of event handlers such as Click, which can fire for any element anywhere in the document's object hierarchy.

The Parent property of the HTML element (the top of an HTML document) points back to itself. If you call Parent inside a loop, verify that the loop's break condition compares the type of the current element and the type of the Parent property, or else your code may execute an infinite loop.

Examples

The following code example finds all of the IMG tags in a document, and uses the Parent property to test whether the IMG is hyperlinked to another page; if it is, the code assigns the URL to the ALT attribute of the IMG tag, so that users can mouse over the image to see where it will take them.

Visual Basic

Private Sub AddUrlToTooltip()
    If (WebBrowser1.Document IsNot Nothing) Then
        With WebBrowser1.Document
            For Each Elem As HtmlElement In .GetElementsByTagName("IMG")
                If (Elem.Parent.TagName.Equals("A")) Then
                    Dim AltStr As String = Elem.GetAttribute("ALT")
                    If (Not (AltStr Is Nothing) And (AltStr.Length <> 0)) Then
                        Elem.SetAttribute("ALT", AltStr & " - points to " & Elem.Parent.GetAttribute("HREF"))
                    Else
                        Elem.SetAttribute("ALT", "Points to " & Elem.Parent.GetAttribute("HREF"))
                    End If
                End If
            Next
        End With
    End If
End Sub

        private void AddUrlToTooltip()
        {
            if (webBrowser1.Document != null)
            {
                foreach (HtmlElement elem in webBrowser1.Document.GetElementsByTagName("IMG"))
                {
                    if (elem.Parent.TagName.Equals("A"))
                    {
                        String altStr = elem.GetAttribute("ALT");
                        if (!(altStr == null) && (altStr.Length != 0))
                        {
                            elem.SetAttribute("ALT", altStr + " - points to " + elem.Parent.GetAttribute("HREF"));
                        }
                        else
                        {
                            elem.SetAttribute("ALT", "Points to " + elem.Parent.GetAttribute("HREF"));
                        }
                    }
                }
            }
        }

Version Information

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

Reference

HtmlElement Class

System.Windows.Forms Namespace

Other Resources

parentElement Property