VB.NET进度条的方法代码


            1.创建进度条：复制代码 代码如下:<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 colorvar 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 Thebut_find.Attributes.Add("onClick", "Lay1.style.visibility='';progress_update();")End IfEnd Sub3.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 Stringjb = "<script language='JavaScript'>" + strValue + "</script>"objPage.RegisterStartupScript("jdt_ok", jb)End Sub4.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