HtmlElement.InsertAdjacentElement Methode

public:
 System::Windows::Forms::HtmlElement ^ InsertAdjacentElement(System::Windows::Forms::HtmlElementInsertionOrientation orient, System::Windows::Forms::HtmlElement ^ newElement);

public:
 System::Windows::Forms::HtmlElement ^ InsertAdjacentElement(System::Windows::Forms::HtmlElementInsertionOrientation orientation, System::Windows::Forms::HtmlElement ^ newElement);

public System.Windows.Forms.HtmlElement InsertAdjacentElement(System.Windows.Forms.HtmlElementInsertionOrientation orient, System.Windows.Forms.HtmlElement newElement);

public System.Windows.Forms.HtmlElement? InsertAdjacentElement(System.Windows.Forms.HtmlElementInsertionOrientation orientation, System.Windows.Forms.HtmlElement newElement);

public System.Windows.Forms.HtmlElement? InsertAdjacentElement(System.Windows.Forms.HtmlElementInsertionOrientation orient, System.Windows.Forms.HtmlElement newElement);

member this.InsertAdjacentElement : System.Windows.Forms.HtmlElementInsertionOrientation * System.Windows.Forms.HtmlElement -> System.Windows.Forms.HtmlElement

member this.InsertAdjacentElement : System.Windows.Forms.HtmlElementInsertionOrientation * System.Windows.Forms.HtmlElement -> System.Windows.Forms.HtmlElement

Public Function InsertAdjacentElement (orient As HtmlElementInsertionOrientation, newElement As HtmlElement) As HtmlElement

Public Function InsertAdjacentElement (orientation As HtmlElementInsertionOrientation, newElement As HtmlElement) As HtmlElement

Parameters

Retouren

De HtmlElement die zojuist is ingevoegd. Als het invoegen is mislukt, wordt dit geretourneerd null.

Voorbeelden

In het volgende codevoorbeeld wordt boven aan elke pagina een DIV element ingevoegd dat gebruikers buiten de ADatum.com-server weergeven. Het voorbeeld vereist dat uw formulier een besturingselement met de WebBrowser naam WebBrowser1bevat. Uw voorbeeld moet ook de naamruimte System.Text.RegularExpressionsimporteren.

public void AddDivMessage()
{
    Uri currentUri = new Uri(webBrowser1.Url.ToString());
    String hostName = null;

    // Ensure we have a host name, and not just an IP, against which to test.
    if (!(currentUri.HostNameType == UriHostNameType.Dns))
    {
        DnsPermission permit = new DnsPermission(System.Security.Permissions.PermissionState.Unrestricted);
        permit.Assert();

        IPHostEntry hostEntry = System.Net.Dns.GetHostEntry(currentUri.Host);
        hostName = hostEntry.HostName;
    }
    else
    {
        hostName = currentUri.Host;
    }

    if (!hostName.Contains("adatum.com"))
    {
        AddTopPageMessage("You are viewing a web site other than ADatum.com. " +
            "Please exercise caution, and ensure your Web surfing complies with all " +
            "corporate regulations as laid out in the company handbook.");
    }
}

private void AddTopPageMessage(String message)
{
    if (webBrowser1.Document != null)
    {
        HtmlDocument doc = webBrowser1.Document;

        // Do not insert the warning again if it already exists. 
        HtmlElementCollection returnedElems = doc.All.GetElementsByName("ADatumWarningDiv");
        if ((returnedElems != null) && (returnedElems.Count > 0))
        {
            return;
        }

        HtmlElement divElem = doc.CreateElement("DIV");
        divElem.Name = "ADatumWarningDiv";
        divElem.Style = "background-color:black;color:white;font-weight:bold;width:100%;";
        divElem.InnerText = message;

        divElem = doc.Body.InsertAdjacentElement(HtmlElementInsertionOrientation.AfterBegin, divElem);
    }
}

Private Sub AddDivMessage()
    Dim CurrentUri As New Uri(WebBrowser1.Url.ToString())
    Dim HostName As String

    ' Ensure we have a host name, and not just an IP, against which to test.
    If (Not CurrentUri.HostNameType = UriHostNameType.Dns) Then
        Dim Permit As New DnsPermission(System.Security.Permissions.PermissionState.Unrestricted)
        Permit.Assert()

        Dim HostEntry As IPHostEntry = System.Net.Dns.GetHostEntry(CurrentUri.Host)
        HostName = HostEntry.HostName
    Else
        HostName = CurrentUri.Host
    End If

    If (Not HostName.Contains("adatum.com")) Then
        AddTopPageMessage("You are viewing a web site other than ADatum.com. " & _
            "Please exercise caution, and ensure your web surfing complies with all " & _
            "corporate regulations as laid out in the company handbook.")
    End If
End Sub

Private Sub AddTopPageMessage(ByVal Message As String)
    If (WebBrowser1.Document IsNot Nothing) Then
        With WebBrowser1.Document
            ' Do not insert the warning again if it already exists.
            Dim ReturnedElems As HtmlElementCollection = .All.GetElementsByName("ADatumWarningDiv")
            If (Not (ReturnedElems Is Nothing) And (ReturnedElems.Count > 0)) Then
                Exit Sub
            End If

            Dim DivElem As HtmlElement = .CreateElement("DIV")
            DivElem.Name = "ADatumWarningDiv"
            DivElem.Style = "background-color:black;color:white;font-weight:bold;width:100%;"
            DivElem.InnerText = Message

            DivElem = .Body.InsertAdjacentElement(HtmlElementInsertionOrientation.AfterBegin, DivElem)
        End With
    End If
End Sub

Opmerkingen

Roep deze methode pas aan nadat de DocumentCompleted gebeurtenis op het WebBrowser besturingselement is opgetreden. Als u deze methode aanroept, kan dit resulteren in een uitzondering, omdat het document niet klaar is met laden.

Of een waarde HtmlElementInsertionOrientation geldig is, is afhankelijk van het type element. Is bijvoorbeeld AfterBegin geldig als het element een DIV, maar niet als het een SCRIPT of IMG een element is, waarvan geen van beide onderliggende elementen kan bevatten.

Zie ook

• methode insertAdjacentElement