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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 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 |
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