Completely remove ViewState for specific pages

Question

I have a site that features some pages which do not require any post-back functionality. They simply display static HTML and don\'t even have any associated code. H

Answer 1

You could override Render and strip it out with a Regex.

Sample as requested. (NB: Overhead of doing this would almost certainly be greater than any possible benefit though!)

[edit: this function was also useful for stripping all hidden input boxes for using the HTML output as a word doc by changing the MIMEType and file extension]

protected override void Render(HtmlTextWriter output)
{
    StringWriter stringWriter = new StringWriter();

    HtmlTextWriter textWriter = new HtmlTextWriter(stringWriter);
    base.Render(textWriter);

    textWriter.Close();

    string strOutput = stringWriter.GetStringBuilder().ToString();

    strOutput = Regex.Replace(strOutput, "<input[^>]*id=\"__VIEWSTATE\"[^>]*>", "", RegexOptions.Singleline);

    output.Write(strOutput);
}

Answer 2

In the <% @page... directive at the top of the page, add EnableViewState="False". That will prevent the ViewState for that particular page.