Remove viewstate to improve website performance

Rewrite the render method to remove viewstate and improve website performance.

System. Io. stringwriter html = New  System. Io. stringwriter (); system. Web. UI. htmltextwriter TW = New  System. Web. UI. htmltextwriter (HTML );  Base  . Render (TW );  String Temp = Html. tostring ();  String S1 = String . Empty, S2 = String . Empty, S3 =String . Empty, S4 = String . Empty, S5 = String . Empty, S6 = String  . Empty;  Int I = 0  ;  Int J = 0  ; I = Temp. indexof ( "  <Form  " );  If (I> 0  ) {J = Temp. indexof ( "  >  "  , I); S1 = Temp. substring ( 0  , I); S2 = Temp. substring (J + 1 , Temp. Length-j- 1  );} I = S2.indexof ("  <Input type = \ "Hidden \" name = \ "_ viewstate \" id = \ "_ viewstate \"  "  );  If (I> 0  ) {J = S2.indexof ( "  >  "  , I); S3 = S2.substring ( 0  , I); S4 = S2.substring (J +1 , S2.length-j- 1  );} I = S4.indexof ( "  <Input type = \ "Hidden \" name = \ "_ eventvalidation \" id = \ "_ eventvalidation \"  "  );  If (I> 0  ) {J = S4.indexof ( "  >  " , I); S5 = S4.substring ( 0  , I); S6 = S4.substring (J + 1 , S4.length-j- 1  ); Temp = S1 + S3 + S5 + S6 ;}  Else  {Temp = S1 + S3 + S4;} temp = Temp. Replace ( "  </Form> " , ""  ); Temp = Temp. Replace ( "  \ R \ n  " , ""  ); TW. Close (); response. Write (temp ); 

Reference: http://www.cnblogs.com/cmsdn/archive/2011/12/12/2285137.html