查询 加载时间过长添加提示信息

1.页面后台添加using System.Threading;的引用。

2.在需要添加提示的按钮事件里面添加如下代码：

　　      Response.Write("<div id='mydiv' >");
            Response.Write("_");
            Response.Write("</div>");
            Response.Write("<script>mydiv.innerText = '';</script>");
            Response.Write("<script language=javascript>;");
            Response.Write("var dots = 0;var dotmax = 10;function ShowWait()");
            Response.Write("{var output; output = '正在装载页面';dots++;if(dots>=dotmax)dots=1;");
            Response.Write("for(var x = 0;x < dots;x++){output += '·';}mydiv.innerText = output;}");
            Response.Write("function StartShowWait(){mydiv.style.display = 'block'; ");
            Response.Write("window.setInterval('ShowWait()',1000);}");
            Response.Write("function HideWait(){mydiv.style.display = 'none';");
            Response.Write("window.clearInterval();}");
            Response.Write("StartShowWait();</script>");
            Response.Flush();
            Thread.Sleep(5000);

3.在前台HTML代码中添加如下代码：

　　　　<script>
               HideWait();
　　　　</script>