我想每次点击提交按钮的时候 都会弹出一个框框,提示页面正在加载...请稍后
不知各位大侠,可有参考代码
不知各位大侠,可有参考代码
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<script language="javascript">
window.onload = function() {pageLoading();}function pageLoading()
{
var a = document.getElementById("loading");
a.parentNode.removeChild(a);
}
var loadingHtml='<div id="loading" style="position:absolute;width:100%;height:100%;left:0px;top:0px;background-color:#ffffff;filter:alpha (opacity=60);">' +
'<div style="text-align:center;padding-top:200px;">' +
'<div style="background-color:#F5F4F1;width:300;border:1px solid #756A4F;padding:20;">' +
'<img src="images/system/loading.gif" hspace="8" align="absmiddle"><span style=font-size:12px;> 正在加载数据,请稍候....</span>' +
'</div></div></div>';
document.write(loadingHtml);
</script>
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Threading;
namespace AjaxTest
{
/**//// <summary>
/// WebForm2 的摘要说明。
/// </summary>
public class WebForm2 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.Label Label1;
private void Page_Load(object sender, System.EventArgs e)
{
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.visibility = 'visible'; ");
Response.Write("window.setInterval('ShowWait()',1000);}");
Response.Write("function HideWait(){mydiv.style.visibility = 'hidden';");
Response.Write("window.clearInterval();}");
Response.Write("StartShowWait();</script>");
Response.Flush();//这一句是最关键的
} private void Button1_Click(object sender, System.EventArgs e)
{
//当点击按钮时,假设请求需要较长时间(这里设置为10秒)
System.Threading.Thread.Sleep(10000);
this.Label1.Text = "终于加载完成啦";
} Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/**//// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.Button1.Click += new System.EventHandler(this.Button1_Click);
this.Load += new System.EventHandler(this.Page_Load); }
#endregion
}
}页面文件:<%@ Page language="c#" Codebehind="WebForm2.aspx.cs" AutoEventWireup="false" Inherits="AjaxTest.WebForm2" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>WebForm2</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
<script>
HideWait();
</script>
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<FONT face="宋体">
<asp:Button id="Button1" style="Z-INDEX: 101; LEFT: 480px; POSITION: absolute; TOP: 200px" runat="server"
Text="Button"></asp:Button>
<asp:Label id="Label1" style="Z-INDEX: 102; LEFT: 632px; POSITION: absolute; TOP: 240px" runat="server">Label</asp:Label></FONT>
</form>
</body>
</HTML>