有人可以解释如何解决这个问题吗?
两个更新面板,两个进度控件,两个命令按钮。
当我单击第一个按钮时,我可以看到第一个异步更新的进度。当我单击第二个命令按钮时 - 如果第一个异步操作仍在进行中,则第一个进度条会消失。如何同时显示两个进度控件。
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>UpdateProgress Tutorial</title>
<style type="text/css">
#UpdatePanel1, #UpdatePanel2 {
width:300px; height:100px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<fieldset>
<legend>UpdatePanel1</legend>
<asp:Label ID="Label1" runat="server" Text="Panel initially rendered."></asp:Label>
<br />
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
<asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1">
<ProgressTemplate>
Panel1 updating...
</ProgressTemplate>
</asp:UpdateProgress>
</fieldset>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="UpdatePanel2" runat="server">
<ContentTemplate>
<fieldset>
<legend>UpdatePanel2</legend>
<asp:Label ID="Label2" runat="server" Text="Panel initially rendered."></asp:Label>
<br />
<asp:Button ID="Button2" runat="server" Text="Button" OnClick="Button2_Click" />
<asp:UpdateProgress ID="UpdateProgress2" runat="server" AssociatedUpdatePanelID="UpdatePanel2">
<ProgressTemplate>
Panel2 updating....
</ProgressTemplate>
</asp:UpdateProgress>
</fieldset>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
代码
protected void Button1_Click(object sender, EventArgs e)
{
// Introducing delay for demonstration.
System.Threading.Thread.Sleep(10000);
Label1.Text = "Page refreshed at " +
DateTime.Now.ToString();
}
protected void Button2_Click(object sender, EventArgs e)
{
// Introducing delay for demonstration.
System.Threading.Thread.Sleep(15000);
Label2.Text = "Page refreshed at " +
DateTime.Now.ToString();
}