js loading 加载效果实现代码,这个是在 asp.net 下的输出 j 代码,实现页面加载效果。
Javascript 是一种由 Netscape 的 LiveScript 发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言,主要目的是为了解决服务器端语言,比如 Perl,遗留的速度问题,为客户提供更流畅的浏览效果。
- protected void Page_Load(object sender, EventArgs e)
- {
- ShowLoading();
- System.Threading.Thread.Sleep(10000);
- ClientScript.RegisterClientScriptBlock(typeof(string), "", "<script>document.body.onload=function(){removeLoadMsg();}</script>");
- }
- /// <summary>
- /// 显示页面正在加载中效果
- /// </summary>
- public void ShowLoading()
- {
- StringBuilder s = new StringBuilder();
- s.Append(" <script language=JavaScript type=text/javascript>\n");
- s.Append(" var t_id = setInterval(animate,20);\n");
- s.Append(" var pos=0;var dir=2;var len=0;\n");
- s.Append(" function animate(){\n");
- s.Append(" var elem = document.getElementById('progress');\n");
- s.Append(" if(elem != null) {\n");
- s.Append(" if (pos==0) len += dir;\n");
- s.Append(" if (len>32 || pos>79) pos += dir;\n");
- s.Append(" if (pos>79) len -= dir;\n");
- s.Append(" if (pos>79 && len==0) pos=0;\n");
- s.Append(" elem.style.left = pos;\n");
- s.Append(" elem.style.width = len;\n");
- s.Append(" }}\n");
- s.Append(" function removeLoadMsg() {\n");
- s.Append(" this.clearInterval(t_id);\n");
- s.Append(" var targelem = document.getElementById('loader_container');\n");
- s.Append(" targelem.style.display='none';\n");
- s.Append(" targelem.style.visibility='hidden';\n");
- s.Append(" }\n ");
- s.Append("</script>\n");
- s.Append("<style>");
- s.Append("#loader_container {text-align:center; position:absolute; top:40%; width:100%; left: 0;}\n");
- s.Append("#loader {font-family:Tahoma, Helvetica, sans; font-size:11.5px; color:#000000; background-color:#FFFFFF; padding:10px 0 16px 0; margin:0 auto; display:block; width:130px; border:1px solid #5a667b; text-align:left; z-index:9999;}\n");
- s.Append("#progress {height:5px; font-size:1px; width:1px; position:relative; top:1px; left:0px; background-color:#8894a8;}\n");
- s.Append("#loader_bg {background-color:#e4e7eb; position:relative; top:8px; left:8px; height:7px; width:113px; font-size:1px;}\n");
- s.Append("</style>\n");
- s.Append("<div id=loader_container>\n");
- s.Append("<div id=loader>\n");
- s.Append("<div align=center>页面正在加载中...</div>\n");
- s.Append("<div id=loader_bg><div id=progress> </div></div>\n");
- s.Append("</div></div>\n ");
- //HttpContext.Current.Response.Write(s.ToString());
- HttpContext.Current.Response.Write(s.ToString());
- //HttpContext.Current.Response.Flush();
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