Viewstate optimization guidelines

1.Use light controls instead of heavy  controls 

  List of Light controls                     

      Lable
      TextBox
      LinkButton
      CheckBox
      RadioButton

Heavy Controls

    DataGrid
    DataList
    Repeater
    ListBox

2.In cases where the page does not need to post back at all, viewstate can be completely eliminated from the page using EnableViewstate="False" in PageDirective


3.Move viewstate to bottom of the page.The reason is  The page would be much more search engine friendly and it would render faster in the browser

4.Disable viewstate for label controls if you are not changing the value of it in code behind .

5.Disable the viewstate for static pages (Which is not having any server controls)
6.I was careful to say that it is "generally" safe to disable view state if you populate the contents of a control each time a page is requested.

Move viewstate to bottom of the page

                                     Recently i have got a problem with in my application..That  is index page having 44,0000(nearly 9 pages ) characters length of viewstate .Hmmm.....I would like to move all the .net stuff __VIEWSTATE to the bottom of the page.

      

                                        The reason is That  page would be much more search engine friendly and it would render faster in the browser.So i have implemented fuctionality to render the viewstate on bottom of the page .I have overrided the "RenderControl" event in master page.here is the code

/// 


/// Code for  moving the  Viewstate to bottom of the page 

/// 

/// 


public override void RenderControl(HtmlTextWriter writer)

{

using (System.IO.StringWriter stringWriter = new System.IO.StringWriter())

{

using (HtmlTextWriter htmlWriter = new HtmlTextWriter(stringWriter))

{

base.Render(htmlWriter);

string html = stringWriter.ToString();

int beginPoint = html.IndexOf("<input type=\"hidden\" name=\"__VIEWSTATE\"")

{

int endPoint = html.IndexOf("/&gt;", beginPoint) + 2;

string viewstateInput = html.Substring(beginPoint, endPoint - beginPoint);

html = html.Remove(beginPoint, endPoint - beginPoint);

int formEndStart = html.IndexOf("") - 1;

if (formEndStart &gt;= 0)

{

html = html.Insert(formEndStart, viewstateInput);

}

}



writer.Write(html);

}

}



}

Copy this code and paste into master page .run the application .Now you can see _viewstate renders in bottom of the page .