using System;

namespace Hmg.DBAccess
{
 /// <summary>
 /// UserBasePage 的摘要说明。
 /// </summary>
 public class UserBasePage : System.Web.UI.Page
 {
  public UserBasePage() {}

  protected override void OnInit (EventArgs e)
  {
   if(!IsSession())
   {
    //指定登陆页
    Response.Redirect("~/Reg/Select.aspx");
   }
  }

  private bool IsSession()
  {
   if(Session["UserNumber"]!=null && Session["UserRole"]!=null)
    return true;
   else
    return false;
  }
 }
}

Visual C# .NET代码
using 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);

在ShowProgress.aspx窗体的html的中输入：
<script>
HideWait();
</script>

点在浏览器中查看即可。

一直想学习Java，可不知道怎么入门，郁闷中