The following code example demonstrates how to override the OnAttributeRender method to check whether a size attribute is rendered for any of the elements that are rendered by this text writer. If a size attribute is rendered, the code checks whether its value is 8 point. If so, the OnAttributeRender method returns true, allowing the attribute and its value to render. If the value is other than 8 point, the OnAttributeRender method returns false, and the attribute and its value are not rendered. If the key parameter of the OnAttributeRender method does not match the Size attribute, the base functionality of the OnAttributeRender method is called, as defined in the XhtmlTextWriter class.

This code example is part of a larger example provided for the XhtmlTextWriter class.

' Override the OnAttributeRender method to 
' allow this text writer to render only eight-point 
' text size.
Overrides Protected Function OnAttributeRender(ByVal name As String, _
  ByVal value As String, _
  ByVal key As HtmlTextWriterAttribute _
) As Boolean
   If key = HtmlTextWriterAttribute.Size Then
      If String.Compare(value, "8pt") = 0 Then
         Return True
      Else
         Return False
      End If 
   Else
      Return MyBase.OnAttributeRender(name, value, key)
   End If
End Function

// Override the OnAttributeRender method to 
// allow this text writer to render only eight-point 
// text size.
protected override bool OnAttributeRender(string name, 
  string value, 
  HtmlTextWriterAttribute key) 
{
    if (key == HtmlTextWriterAttribute.Size)
    {
        if (String.Compare(value, "8pt") == 0)
        {
            return true;
        }
        else
        {
           return false;
        } 
     }
     else
     {
         return base.OnAttributeRender(name, value, key);
     }

 }

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

.NET Framework

Reference