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VB.NET進度條的方法代碼

2024-07-10 13:16:19
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來源:轉載
供稿:網友
1.創建進度條:

復制代碼 代碼如下:


<DIV><FONT face="宋體"></FONT><FONT face="宋體"></FONT><FONT face="宋體"></FONT><FONT face="宋體"></FONT><br>
<b><font color="#800080" size="2">      & nbsp;          正在檢索數據,請稍候...</font></b>
<table>
<tr>
<td>
<div><span> </span>
<span> </span> <span> </span> <span>
 </span> <span> </span> <span> </span>
<span> </span> <span> </span> <span>
 </span> <span> </span> <span> </span>
<span> </span> <span> </span><span> </span><span> </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.設置查詢按鈕屬性

復制代碼 代碼如下:


Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'在此處放置初始化頁的用戶代碼
If Not IsPostBack The
but_find.Attributes.Add("onClick", "Lay1.style.visibility='';progress_update();")
End If
End Sub


3.注冊javascript腳本

復制代碼 代碼如下:


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.在查詢按鈕單擊事件中調用

復制代碼 代碼如下:


Private Sub but_find_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles but_find.Click
'查詢數據代碼
'----------------
Me.scriptjdt(Me, "Lay1.style.visibility='hidden';progress_stop();") '關閉進度條代碼
End Sub

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