Classe HtmlTextWriter (System.Web.UI)

' Overrides the Render method to write a <span> element
' that applies styles and attributes.     
Protected Overrides Sub Render(ByVal writer As HtmlTextWriter)

    ' Set attributes and values along with attributes and styles
    ' attribute defined for a <span> element.
    writer.AddAttribute(HtmlTextWriterAttribute.Onclick, "alert('Hello');")
    writer.AddAttribute("CustomAttribute", "CustomAttributeValue")
    writer.AddStyleAttribute(HtmlTextWriterStyle.Color, "Red")
    writer.AddStyleAttribute("CustomStyle", "CustomStyleValue")
    writer.RenderBeginTag(HtmlTextWriterTag.Span)

    '  Create a space and indent the markup inside the 
    ' <span> element.
    writer.WriteLine()
    writer.Indent += 1

    writer.Write("Hello")
    writer.WriteLine()

    ' Controls the encoding of markup attributes
    ' for an <img> element. Simple known values 
    ' do not need encoding.
    writer.AddAttribute(HtmlTextWriterAttribute.Alt, _
        "Encoding, ""Required""", _
        True)
    writer.AddAttribute("myattribute", _
        "No &quot;encoding &quot; required", _
        False)
    writer.RenderBeginTag(HtmlTextWriterTag.Img)
    writer.RenderEndTag()
    writer.WriteLine()

    ' Create a non-standard markup element.
    writer.RenderBeginTag("Mytag")
    writer.Write("Contents of MyTag")
    writer.RenderEndTag()
    writer.WriteLine()

    ' Create a manually rendered <img> element
    ' that contains an alt attribute.
    writer.WriteBeginTag("img")
    writer.WriteAttribute("alt", "A custom image.")
    writer.Write(HtmlTextWriter.TagRightChar)
    writer.WriteEndTag("img")

    writer.WriteLine()

    writer.Indent -= 1
    writer.RenderEndTag()

End Sub 'Render

        // Overrides the Render method to write a <span> element
        // that applies styles and attributes. 
        protected override void Render(HtmlTextWriter writer) 
        {     
            // Set attributes and values along with attributes and styles  
            // attribute defined for a <span> element.
            writer.AddAttribute(HtmlTextWriterAttribute.Onclick, "alert('Hello');");
            writer.AddAttribute("CustomAttribute", "CustomAttributeValue");
            writer.AddStyleAttribute(HtmlTextWriterStyle.Color, "Red");
            writer.AddStyleAttribute("Customstyle", "CustomStyleValue");
            writer.RenderBeginTag(HtmlTextWriterTag.Span);
            // Create a space and indent the markup inside the 
            // <span> element.
            writer.WriteLine();
            writer.Indent++;
            writer.Write("Hello");
            writer.WriteLine();

            // Controls the encoding of markup attributes
            // for an <img> element. Simple known values 
	        // do not need encoding.
            writer.AddAttribute(HtmlTextWriterAttribute.Alt, 
                "Encoding, \"Required\"", 
                true);
            writer.AddAttribute("myattribute", 
                "No &quot;encoding &quot; required", 
                false);
            writer.RenderBeginTag(HtmlTextWriterTag.Img);
            writer.RenderEndTag();
            writer.WriteLine();

            // Create a non-standard markup element.
            writer.RenderBeginTag("MyTag");
            writer.Write("Contents of MyTag");
            writer.RenderEndTag();
            writer.WriteLine();

            // Create a manually rendered <img> element
            // that contains an alt attribute.
            writer.WriteBeginTag("img");
            writer.WriteAttribute("alt", "A custom image.");
            writer.Write(HtmlTextWriter.TagRightChar);
            writer.WriteEndTag("img");
            writer.WriteLine();

            writer.Indent--;
            writer.RenderEndTag();

        }