对于加载时间比较长的ASP.NET页面，我们可以在客户端浏览器中显示进度条来显示页面正在装载。下面就是具体的实现过程：
- 新建项目，名字为WebPortal，在项目类型中选择Visual C#项目或者Visual Basic项目都可；
- 在模板类型中选择ASP.NET Web应用程序；
- 位置里输入：http://localhost/WebPortal；
- 添加新项：名字为ShowProgress的Web窗体。
- 在您的Web窗体ShowProgress.aspx上添加任何其他的Web服务器控件。
- 在ShowProgress.aspx上单击右键，点“查看代码”，在最上面输入：
Visual C# .NET代码 using System.Threading;
Visual Basic .NET代码 Imports System.Threading
- 在Page_Load事件里输入： Visual C# .NET代码 Response.Write("
<div id='mydiv' >");
Response.Write("_");
Response.Write("</div>
");
Response.Write("
<script>mydiv.innerText = '';</script>
");
Response.Write("
<script language=javascript>;");
Response.Write("var dots = 0;var dotmax = 10;function ShowWait()");
Response.Write("{var output; output = '正在装载页面';dots++;if(dots>=dotmax)dots=1;");
Response.Write("for(var x = 0;x <dots;x++){output += '·';}mydiv.innerText = output;}");
Response.Write("function StartShowWait(){mydiv.style.visibility = 'visible'; ");
Response.Write("window.setInterval('ShowWait()',1000);}");
Response.Write("function HideWait(){mydiv.style.visibility = 'hidden';");
Response.Write("window.clearInterval();}");
Response.Write("StartShowWait();</script>
");
Response.Flush();
Thread.Sleep(10000);
Visual Basic .NET代码 Response.Write("
<div id='mydiv' >")
Response.Write("_")
Response.Write("</div>
")
Response.Write("
<script>mydiv.innerText = '';</script>
")
Response.Write("
<script language=javascript>;")
Response.Write("var dots = 0;var dotmax = 10;function ShowWait()")
Response.Write("{var output; output = '正在装载页面';dots++;if(dots>=dotmax)dots=1;")
Response.Write("for(var x = 0;x <dots;x++){output += '·';}mydiv.innerText = output;}")
Response.Write("function StartShowWait(){mydiv.style.visibility = 'visible'; ")
Response.Write("window.setInterval('ShowWait()',1000);}")
Response.Write("function HideWait(){mydiv.style.visibility='hidden';")
Response.Write("window.clearInterval();}")
Response.Write("StartShowWait();</script>
")
Response.Flush()
Thread.Sleep(10000)
- 在ShowProgress.aspx窗体的html的中输入：
<script>
HideWait();
</script>
- 点在浏览器中查看即可。
