一个ASP.NET的进度条

1.创建进度条：

<DIV id="Lay1" style="Z-INDEX: 1; LEFT: 1%; VISIBILITY: hidden; WIDTH: 99%; CURSOR: crosshair; POSITION: absolute; TOP: 32px; HEIGHT: 95%; BACKGROUND-COLOR: #ffffff"><FONT face="宋体"></FONT><FONT face="宋体"></FONT><FONT face="宋体"></FONT><FONT face="宋体"></FONT><br>

<b><font color="#800080" size="2">      & nbsp;          正在检索数据，请稍候...</font></b>

<table align="center">

<tr>

<td>

<div style="BORDER-RIGHT: black 1px solid; PADDING-RIGHT: 2px; BORDER-TOP: black 1px solid; PADDING-LEFT: 2px; FONT-SIZE: 8pt; PADDING-BOTTOM: 2px; BORDER-LEFT: black 1px solid; PADDING-TOP: 2px; BORDER-BOTTOM: black 1px solid"><span id="progress1"> </span>

<span id="progress2"> </span> <span id="progress3"> </span> <span id="progress4">

 </span> <span id="progress5"> </span> <span id="progress6"> </span>

<span id="progress7"> </span> <span id="progress8"> </span> <span id="progress9">

 </span> <span id="progress10"> </span> <span id="progress11"> </span>

<span id="progress12"> </span> <span id="progress13"> </span><span id="progress14"> </span><span id="progress15"> </span>

</div>

</td>

</tr>

</table>

<script language="javascript">

var progressEnd = 15; // set to number of progress <span>'s.

var progressColor = 'blue'; // set to progress bar color

var progressInterval = 300; // set to time between updates (milli-seconds)

var progressAt = progressEnd;

var progressTimer;

function progress_clear() {

for (var i = 1; i <= progressEnd; i++) document.getElementById('progress'+i).style.backgroundColor = 'transparent';

progressAt = 0;

}

function progress_update() {

progressAt++;

if (progressAt > progressEnd) progress_clear();

else document.getElementById('progress'+progressAt).style.backgroundColor = progressColor;

progressTimer = setTimeout('progress_update()',progressInterval);

}

function progress_stop() {

clearTimeout(progressTimer);

progress_clear();

}

//progress_update(); // start progress bar

</script>

</DIV>

2.设置查询按钮属性

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

'在此处放置初始化页的用户代码

If Not IsPostBack The

but_find.Attributes.Add("onClick", "Lay1.style.visibilITy='';progress_update();")

End If

End Sub

3.注册javascript脚本

Public Sub scriptjdt(ByVal objPage As System.web.UI.Page, ByVal strValue As String)

Dim jb As String

jb = "<script language='JavaScript'>" + strValue + "</script>"

objPage.RegisterStartupScript("jdt_ok", jb)

End Sub

4.在查询按钮单击事件中调用

Private Sub but_find_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles but_find.Click

'查询数据代码

'----------------

Me.scriptjdt(Me, "Lay1.style.visibilITy='hidden';progress_stop();") '关闭进度条代码

End Sub