页面加载数据量比较大,想在页面接在完成前加一个“数据加载中”,请问如何在asp.net中实现
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给你一定实例吧
实例之让页面等待注意建一个页面demo_waittest.aspx文件拷贝代码即可
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="demo_waittest.aspx.cs" Inherits="codeexample_demo_waittest" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title> 无标题页 </title>
</head>
<body >
实例之让页面等待
<form id="form1" runat="server">
<div id="popupLoad" style="display:none; z-index: 100; left: 0px; width: 600px; position: absolute; top: 40px; height: 300px; font-size: xx-large; vertical-align: middle; text-align: center;" >
<!--等待提示的信息--> 等待提示的信息 </div>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" style="display:inline"/>
<div id="ReportDiv"> <asp:GridView ID="GridView1" runat="server">
</asp:GridView>
</div>
<script language="javascript" type="text/javascript">
</script>
</form>
</body>
</html>
[code=C#]using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;public partial class codeexample_demo_waittest : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
this.Button1.Attributes.Add("onclick", "document.getElementById('popupLoad').style.display='inline';return true;");
}
protected void Button1_Click(object sender, EventArgs e)
{
DataTable dt = new DataTable();
dt.Columns.Add("id");
dt.Columns.Add("field1"); System.Random rd = new Random();
for (int i = 0; i < 20000; i++)
dt.Rows.Add(new object[] { i + 1, rd.Next(99999) }); dt.AcceptChanges();
this.GridView1.DataSource = dt;
this.GridView1.DataBind(); //Page.RegisterStartupScript("js", " <script> document.getElementById('popupLoad').style.dispaly='none'; </script> ");
}
}
[/code]
//进度条
Response.Write("<div id='mydiv' style='font-size:9pt'>");
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 = '数据加载中,请稍候';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.visibility = 'visible'; ");
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(8000);
不过是System.Threading.Thread.Sleep(8000);