Retrieves a single HtmlElement using the element's ID attribute as a search key.
(in System.Windows.Forms.dll)
Visual Basic (Declaration)
Public Function GetElementById ( _
id As String _
) As HtmlElement
Dim instance As HtmlDocument
Dim id As String
Dim returnValue As HtmlElement
returnValue = instance.GetElementById(id)
public HtmlElement GetElementById(
string id
)
public:
HtmlElement^ GetElementById(
String^ id
)
public function GetElementById(
id : String
) : HtmlElement
If there are multiple elements in the document with the same ID value, GetElementById will return the first one it finds.
The following code example retrieves a named TABLE from a document, counts up the number of rows, and displays the result in the Web page. The code example requires that you have a WebBrowser control in your project named WebBrowser1, and that you have loaded a Web page with a TABLE whose ID attribute is Table1.
Private Function GetTableRowCount(ByVal TableID As String) As Integer
Dim Count As Integer = 0
If (WebBrowser1.Document IsNot Nothing) Then
Dim TableElem As HtmlElement = WebBrowser1.Document.GetElementById(TableID)
If (TableElem IsNot Nothing) Then
For Each RowElem As HtmlElement In TableElem.GetElementsByTagName("TR")
Count = Count + 1
Next
Else
Throw (New ArgumentException("No TABLE with an ID of " & TableID & " exists."))
End If
End If
GetTableRowCount = Count
End Function
private Int32 GetTableRowCount(string tableID)
{
Int32 count = 0;
if (webBrowser1.Document != null)
{
HtmlElement tableElem = webBrowser1.Document.GetElementById(tableID);
if (tableElem != null)
{
foreach (HtmlElement rowElem in tableElem.GetElementsByTagName("TR"))
{
count++;
}
}
else
{
throw(new ArgumentException("No TABLE with an ID of " + tableID + " exists."));
}
}
return(count);
}
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
Reference