HtmlElement.InsertAdjacentElement Método

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 orient, 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

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

Parámetros

Devoluciones

Elemento HtmlElement que se acaba de insertar. Si se ha producido un error en la inserción, se devolverá null.

Ejemplos

En el ejemplo de código siguiente se inserta un DIV elemento en la parte superior de cada página que los usuarios ven fuera del servidor de ADatum.com. El ejemplo requiere que el formulario contenga un WebBrowser control denominado WebBrowser1. El ejemplo también debe importar el espacio de nombres System.Text.RegularExpressions.

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

Comentarios

No llame a este método hasta después de que se haya producido el DocumentCompleted evento en el WebBrowser control. Llamar a este método antes de entonces puede dar lugar a una excepción, ya que el documento no habrá terminado de cargarse.

Si un valor de HtmlElementInsertionOrientation es válido dependerá del tipo del elemento. Por ejemplo, AfterBegin es válido si el elemento es , DIVpero no si es un SCRIPT elemento o IMG , ninguno de los cuales puede contener elementos secundarios.

Se aplica a

Consulte también

• insertAdjacentElement (método)