VB.NET创建进度条的方法

本篇内容主要讲解“VB.NET创建进度条的方法”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“VB.NET创建进度条的方法”吧!

1.创建进度条：

复制代码 代码如下:

<DIV id="Lay1" ><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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;& nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;正在检索数据，请稍候...</font></b>
<table align="center">
<tr>
<td>
<div ><span id="progress1">&nbsp;</span>
<span id="progress2">&nbsp;</span> <span id="progress3">&nbsp;</span> <span id="progress4">
&nbsp;</span> <span id="progress5">&nbsp;</span> <span id="progress6">&nbsp;</span>
<span id="progress7">&nbsp;</span> <span id="progress8">&nbsp;</span> <span id="progress9">
&nbsp;</span> <span id="progress10">&nbsp;</span> <span id="progress11">&nbsp;</span>
<span id="progress12">&nbsp;</span> <span id="progress13">&nbsp;</span><span id="progress14">&nbsp;</span><span id="progress15">&nbsp;</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

复制代码 代码如下:

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

复制代码 代码如下:

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

复制代码 代码如下:

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

到此，相信大家对“VB.NET创建进度条的方法”有了更深的了解，不妨来实际操作一番吧！这里是亿速云网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！