.net web加载时出现正在加载的效果

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方法一：
1、添加引用
using System.Threading;
2、在页面加载时
protected void Page_Load(object sender, EventArgs e)
{////////////////////以下是进度条
Response.Write("<div style='COLOR: red; POSITION: absolute; ' 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 = '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();
Thread.Sleep(1000);
////////////////////////////////////////
}
3、在后台脚本添加
<script language="javascript">

HideWait();
</script>

方法二：
首先建一个HTML面，源码为：
<!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" id="mainWindow" >
<head >
<title >无标题页 </title >
<script language="javascript" type="text/javascript" >
function SetPorgressBar(pos)
{
//设置进度条居中
var screenHeight = window["mainWindow"].offsetHeight;
var screenWidth = window["mainWindow"].offsetWidth;
ProgressBarSide.style.width = Math.round(screenWidth / 4);
ProgressBarSide.style.left = Math.round(screenWidth / 3);
ProgressBarSide.style.top = Math.round(screenHeight / 2);
ProgressBarSide.style.height = "21px";
ProgressBarSide.style.display = "";

//设置进度条百分比
ProgressBar.style.width = pos + "%";
ProgressText.innerHTML = "正在加载,请稍后....." + pos + "%";
}

//完成后隐藏进度条
function SetCompleted()
{
ProgressBarSide.style.display = "none";
MyTable.style.display="none";
}
</script >
</head >
<body >
<!-- <div id="mydiv" style="width: 224px" >数据处理中.... </div >-- >
<div id="ProgressBarSide" style="position:absolute;height:21px;width:100px;color:Silver;border-width:1px;border-style:Solid;display:none" >
<div id="ProgressBar" style="position:absolute;height:21px;width:0%;background-color:PaleTurquoise" > </div >
<div id="ProgressText" style="position:absolute;height:21px;width:100%;text-align:center" > </div >

</div >
</body >
</html >

在你要显示的页面page_load，代码：
if (!Page.IsPostBack)
{
beginProgress();

for (int i = 1; i <= 100; i++)
{
setProgress(i);

//此处用线程休眠代替实际的操作，如加载数据等
System.Threading.Thread.Sleep(20);
}

finishProgress();
}

函数：
/// <summary >
///显示进度条
/// </summary >

private void beginProgress()
{
//根据ProgressBar.htm显示进度条界面
string templateFileName = Path.Combine(Server.MapPath("."), "ProgressBar.htm");
StreamReader reader = new StreamReader(@templateFileName,System.Text.Encoding.GetEncoding("GB2312"));
string html = reader.ReadToEnd();
reader.Close();
Response.Write(html);
Response.Flush();
}

private void setProgress(int percent)
{
string jsBlock = " <script >SetPorgressBar( "" + percent.ToString() + " "); </script >";
Response.Write(jsBlock);
Response.Flush();
}

private void finishProgress()
{
string jsBlock = " <script >SetCompleted(); </script >";
Response.Write(jsBlock);
Response.Flush();
}

方法三：

1. 进度条模板文件 ProgressBar.htm
1<HTML>
2<head>
3<title></title>
4<script language="JavaScript">
5//设置进度条进度
6function SetPorgressBar(msg, pos)
7{
8 ProgressBar.style.width= pos +"%";
9 WriteText("Msg1",msg +" 已完成"+ pos +"%");
10}
11
12//设置进度条完成信息
13function SetCompleted(msg)
14{
15 if(msg=="")
16 WriteText("Msg1","完成。");
17 else
18 WriteText("Msg1",msg);
19}
20
21// 更新文本显示信息
22function WriteText(id, str)
23{
24 var strTag = '<font face="Verdana, Arial, Helvetica" size="2" color="#ea9b02"><B>' + str + '</B></font>';
25 if (document.all) document.all[id].innerHTML = strTag;
26}
27</script>
28</head>
29<body>
30<div id="Msg1"><font face="Verdana, Arial, Helvetica" size="2" color="#ea9b02"><b>正在加载

</b></font></div>
31<div id="ProgressBarSide" style="color:Silver;border-width:1px;border-style:Solid;width:300px;">
32 <div id="ProgressBar" style="background-color:#3366FF; height:21px; width:0%;"></div>
33</div>
34</body>
35</HTML>

2. Default.ASPx

1 protectedvoid Page_Load(object sender, EventArgs e)
2 {
3 // 根据 ProgressBar.htm 显示进度条界面
4 string templateFileName = Path.Combine(Server.MapPath("."), "ProgressBar.htm");
5 StreamReader reader =new StreamReader(@templateFileName,System.Text.Encoding.GetEncoding("gb2312"));
6 string HTML = reader.ReadToEnd();
7 reader.Close();
8 Response.Write(HTML);
9 Response.Flush();
10 System.Threading.Thread.Sleep(200);
11
12 // 根据处理任务处理情况更新进度条
13 string jsBlock;
14 for (int i =1; i <=100; i++)
15 {
16 System.Threading.Thread.Sleep(10);
17 jsBlock ="<script>SetPorgressBar('"+"A"+ i.ToString() +"','"+ i.ToString() +"'); </script>";
18
19 Response.Write(jsBlock);
20 Response.Flush();
21 }
22
23 // 处理完成
24 jsBlock ="<script>SetCompleted('处理完成。'); </script>";
25 Response.Write(jsBlock);
26 Response.Flush();
27 }

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使用HTML,CSS快速导出数据到Excel | .net文件上传的各种操作及创建文件夹和删除 ...

2012-08-12 22:15
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