- writer (HtmlTextWriter)
An HtmlTextWriter object that represents the output stream for rendering HTML content.
The Render(HtmlTextWriter) method is used by control developers to extend the functionality of the UpdatePanel control.
The Render(HtmlTextWriter) method writes the rendered content of the UpdatePanel control to the browser by using the supplied HtmlTextWriter object. When you override the Render(HtmlTextWriter) method in a derived class, make sure to call the Render(HtmlTextWriter) method of the base class so that the child controls of the UpdatePanel control are rendered.
Assembly: System.Web.Extensions (Module: System.Web.Extensions)