HtmlElementInsertionOrientation Enumeration


The .NET API Reference documentation has a new home. Visit the .NET API Browser on to see the new experience.

Defines values that describe where to insert a new element when using InsertAdjacentElement.

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

public enum HtmlElementInsertionOrientation

Member nameDescription

Insert the element after the current element, but before all other content in the current element.


Insert the element after the current element, but after all other content in the current element.


Insert the element before the current element.


Insert the element after the current element.

The following code example inserts a DIV element into the top of every page that users view outside of the server. The example requires that your form contains a WebBrowser control named WebBrowser1. Your example must also import the namespace 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);

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

	if (!hostName.Contains(""))
		AddTopPageMessage("You are viewing a web site other than " +
			"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)) 

              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);

.NET Framework
Available since 2.0
Return to top