Assembly: System.Web (in System.Web.dll)
The method renders the begin tag and end tag of the TextBox control to the HtmlTextWriter object for output on the client. If the TextMode property is set to MultiLine, the content of the TextBox control is rendered as an HTML <textarea> element.
The method is used primarily by control developers extending the functionality of the TextBox control.
The following code example demonstrates how to override the method in a custom server control so that the TextBox control is always displayed with an image.
This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.