[b]第一： [/b]private void Button1_Click( object sender, System.EventArgs e )   {     Response.Redirect( Request.Url.ToString( ) ); } [b]第二： [/b]private void Button2_Click( object sender, System.EventArgs e )   {     Response.Write( "     <script language=javascript>window.location.href=document.URL;     </script>" ); } [b]第三： [/b]private void Button3_Click( object sender, System.EventArgs e )   {     Response.AddHeader( "Refresh","0" ); } [b]第四： [/b]private void Button6_Click( object sender, System.EventArgs e )   {     //好像有些不对？     //Response.Write( "     <script language=javascript>window.location.reload( );     </script>" ); } [b]第五：(需替换<>) [/b]<script><!-- var limit="3:00" if ( document.images ) {     var parselimit=limit.split( ":" )parselimit=parselimit[0]*60+parselimit[1]*1 } function beginrefresh( ) {     if ( !document.images )returnif ( parselimit==1 )window.location.reload( )else     {         parselimit-=1curmin=Math.floor( parselimit/60 )cursec=parselimit% 60if ( curmin!=0 )curtime=curmin+"分"+cursec+"秒后重刷本页！"elsecurtime=cursec+ "秒后重刷本页！"window.status=curtimesetTimeout( "beginrefresh( )",1000 )     } } window. style="Z-INDEX: 102; LEFT: 408px; POSITION: absolute; TOP: 232px" ms_positioning="text2D"> <P><FONT size="3">自动刷新页面</FONT></P> </DIV> [b]第六： [/b]<meta http-equiv="refresh" content="300; url=target.html">