updatepanel 刷新 gridview太慢的解决方法,当包含dropdownlist控件时

转载:

忘了从哪里找到的,是一个国外网站.

只要在</form>后面使用以下代码,就可以加速刷新.

 

 
   
      
  < 
  script  
  language 
  ="javascript" 
   type 
  ="text/javascript" 
  > 
  

         
  function 
   disposeTree(sender, args) {
             
  var 
   elements  
  = 
   args.get_panelsUpdating();
             
  for 
   ( 
  var 
   i  
  = 
   elements.length  
  - 
    
  1 
  ; i  
  >= 
    
  0 
  ; i 
  -- 
  ) {
                 
  var 
   element  
  = 
   elements[i];
                 
  var 
   allnodes  
  = 
   element.getElementsByTagName( 
  ' 
  * 
  ' 
  ),
                length  
  = 
   allnodes.length;
                 
  var 
   nodes  
  = 
    
  new 
   Array(length)
                 
  for 
   ( 
  var 
   k  
  = 
    
  0 
  ; k  
  < 
   length; k 
  ++ 
  ) {
                    nodes[k]  
  = 
   allnodes[k];
                }
                 
  for 
   ( 
  var 
   j  
  = 
    
  0 
  , l  
  = 
   nodes.length; j  
  < 
   l; j 
  ++ 
  ) {
                     
  var 
   node  
  = 
   nodes[j];
                     
  if 
   (node.nodeType  
  === 
    
  1 
  ) {
                         
  if 
   (node.dispose  
  && 
    
  typeof 
   (node.dispose)  
  === 
    
  " 
  function 
  " 
  ) {
                            node.dispose();
                        }
                         
  else 
    
  if 
   (node.control  
  && 
    
  typeof 
   (node.control.dispose) 
  === 
    
  " 
  function 
  " 
  ) {
                            node.control.dispose();
                        }

                         
  var 
   behaviors  
  = 
   node._behaviors;
                         
  if 
   (behaviors) {
                            behaviors  
  = 
   Array.apply( 
  null 
  , behaviors);
                             
  for 
   ( 
  var 
   k  
  = 
   behaviors.length  
  - 
    
  1 
  ; k  
  >= 
    
  0 
  ; k 
  -- 
  ) {
                                behaviors[k].dispose();
                            }
                        }
                    }
                }
                element.innerHTML  
  = 
    
  "" 
  ;
            }

        }
        Sys.WebForms.PageRequestManager.getInstance().add_pageLoading(disposeTree);

 
  </ 
  script 
  >