Question

I want to remove the view state using the method below. My problem is I don’t like it put the code below into almost every page. I like to move it to the masterpage or convert it to a class and run it from the masterpage.
The code below on works on the non-masterpage .
It will have this problem if I put inside the masterpage CS0115: ‘MasterPage.SavePageStateToPersistenceMedium(object)’: no suitable method found to override

#region Disable ViewState
protected override void SavePageStateToPersistenceMedium(object state)
{
}
protected override object LoadPageStateFromPersistenceMedium()
{
    return null;
}
#endregion

Answer 1

    //using the below you will need to change  asp:ImageButton coding method. You need to convert it to a regular submit button. There may be other problems which i don't now yet.

Place the code below on the master page.

     protected override void Render(HtmlTextWriter writer)
    {///Articles/How-to-disable-or-remove-ViewState-Hidden-Field-in-ASP.Net-Page.aspx
        StringBuilder sb = new StringBuilder();
        StringWriter sw = new StringWriter(sb);
        HtmlTextWriter ht = new HtmlTextWriter(sw);
        base.Render(ht);
        string html = sb.ToString();
        //The remove the value and it id from the view status this next line
        html = Regex.Replace(html, "<input[^>]*id=\"(__VIEWSTATE)\"[^>]*>", "<input type=\"hidden\" name=\"__VIEWSTATE\" value=\"\"/>", RegexOptions.IgnoreCase);
        //To completely remove the view state use the line below
       // html = Regex.Replace(html, "<input[^>]*id=\"(__VIEWSTATE)\"[^>]*>", "", RegexOptions.IgnoreCase);
        writer.Write(html);
        sb = null; html = null; ht.Dispose(); sw.Dispose();
    }

Use this technique to detect the clicked button on your aspx page(not the master page). Place this code in the code behind
if (Request.Form[“nonPostBackButton1.y”] != null)
{
Response.Write(“
nonPostBackButton1 is just pressed“);
}

        if (Request.Form["nonPostBackButton2.y"] != null)
        {
            Response.Write("<br/><b>nonPostBackButton2 is just pressed</b>");
        }

This is the sample of the image submit buttons

<input type="image" alt="nonPostBackButton1"  name="nonPostBackButton1"/>&nbsp; Use this method instead of the postback buttons. This is the image submit button 1</p>
<p><input type="image" alt="nonPostBackButton2"  name="nonPostBackButton2"/>&nbsp; Use this method instead of the postback buttons. This is the image submit button 1</p>