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
