很多情况,我们的页面加载速度很慢,这时候就需要一个进度条来等待,增加用户友好性.
原理比较简单,在page_load的时候创建一个div,然后判断页面的加载装载状态,完成后消失.下面的代码:
");
            //hc.Response.Write("");
            hc.Response.Write("");
            hc.Response.Write("function document.onreadystatechange()");
            hc.Response.Write(@"{ try  
                                   {
                                    //关键就是这句了,判断页面是否加载完毕
                                    if (document.readyState == 'complete') 
                                    {
                                         delNode('loading');
                                        
                                    }
                                   }
                                 catch(e)
                                    {
                                        alert('页面加载失败');
                                    }
                                                        } 
                            //删除创建的div
                            function delNode(nodeId)
                            {   
                                try
                                {   
                                      var div =document.getElementById(nodeId); 
                                      if(div !==null)
                                      {
                                          div.parentNode.removeChild(div);   
                                          div=null;    
                                          CollectGarbage(); 
                                      } 
                                }
                                catch(e)
                                {   
                                   alert('删除ID为'+nodeId+'的节点出现异常');
                                }   
                            }

                            ");

            hc.Response.Write("");
            hc.Response.Flush();
        }