C# 页面基类

using  System;
using  System.Data;
using  System.Configuration;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Web.UI.HtmlControls;
using  System.ComponentModel;
using  System.IO;
using  System.Text;
using  System.Text.RegularExpressions;
using  System.Collections;

namespace  UserManager
{
    [DesignerCategory( " ASPXCodeBehind " )]
     public   class  PageBase : System.Web.UI.Page
    {
         protected   override   void  OnLoad(EventArgs e)
        {
            Context.Response.Cache.SetCacheability(HttpCacheability.NoCache);
             /// /首次加载,检查权限;再次加载,检查是否登录或超时
               if  ((CheckPermission()  &&   ! IsPostBack)  ||  (IsPostBack  &&  Session[ " loginuser_id " ]  !=   null ))
            {
                 base .OnLoad(e);
            }
             if  ( ! this .IsPostBack)
            {
                 base .OnLoad(e);
            }
        }

         ///   <summary>
         ///  将对象保存到Session中
          ///   </summary>
         ///   <param name="name"> 键名 </param>
         ///   <param name="value"> 键值 </param>        
         protected   virtual   void  SaveToSession( string  name,  object  value)
        {
             if  (Session[name]  ==   null )
            {
                Session.Add(name, value);
            }
             else
            {
                Session[name]  =  value;
            }
        }

         ///   <summary>
         ///  将对象从Session中移出
          ///   </summary>
         ///   <param name="name"> 键名 </param>
         protected   virtual   void  RemoveSession( string  name)
        {
             if  (Session[name]  !=   null )
            {
                Session.Remove(name);
            }
        }

         ///   <summary>
         ///  获取Session值
          ///   </summary>
         ///   <param name="name"> 键名 </param>
         ///   <returns> 键值 </returns>
         protected   virtual   object  GetFromSession( string  name)
        {
             return  Session[name];
        }

         ///   <summary>
         ///  将对象保存到ViewState中
          ///   </summary>
         ///   <param name="name"> 键名 </param>
         ///   <param name="value"> 键值 </param>
         protected   virtual   void  SaveToViewState( string  name,  object  value)
        {
             if  (ViewState[name]  ==   null )
            {
                ViewState.Add(name, value);
            }
             else
            {
                ViewState[name]  =  value;
            } 
        }

         ///   <summary>
         ///  获取ViewState值
          ///   </summary>
         ///   <param name="name"> 键名 </param>
         ///   <returns> 键值 </returns>
         protected   virtual   object  GetFromViewState( string  name)
        {
             return  ViewState[name];
        }

         ///   <summary>
         ///  将对象从ViewState中移出
          ///   </summary>
         ///   <param name="name"> 键名 </param>
         protected   virtual   void  RemoveViewState( string  name)
        {
             if  (ViewState[name]  !=   null )
            {
                ViewState.Remove(name);
            }
        }

         ///   <summary>
         ///  弹出提示信息
          ///   </summary>
         ///   <param name="msg"> 信息内容 </param>
         protected   virtual   void  ShowMessage( string  msg)
        {
            ClientScript.RegisterStartupScript(GetType(),  " ___asp2TrainingShowMessage " ,
                                                  " <script language=\ " javascript\ " >var str=\ ""  +
                                                 msg.Replace( " \\ " ,  " \\\\ " ).Replace( " \r\n " ,  "   " ).Replace( " \ "" ,  "' ") +
                                                  " \ " ;alert(str.replace( /< br >/ g, ' \\n ' ).replace( /< BR >/ g, ' \\n ' )); </ script > " );
        }

         ///   <summary>
         ///  向页面写入脚本
          ///   </summary>
         ///   <param name="key"> Key </param>
         ///   <param name="content"> 内容 </param>
         protected   virtual   void  RegisterJavaScript( string  key, string  content)
        {
             if  (key  ==   null   ||  key.Equals( "" ))
            {
                key  =   " ___asp2TrainingFunctionJavascript " ;
            }

             if  (content  ==   null )
            {
                content  =   "" ;
            }

            ClientScript.RegisterStartupScript(GetType(), key,  " <script> "   +  content  +   " </script> " );
        }

         ///   <summary>
         ///  检查用户权限
          ///   </summary>
         protected   virtual   bool  CheckPermission()
        {
             if  (Session[ " userModuleList " ]  !=   null )
            {
                ArrayList userModuleList  =  (ArrayList)Session[ " userModuleList " ];
                 string  path  =  Request.Path.Substring(Request.ApplicationPath.Length  +   1 );
                 if  ( ! userModuleList.Contains(path))
                {
                    Response.Redirect(Request.ApplicationPath  +   " /NoPermission.aspx " );
                     return   false ;
                }
                 else
                {
                     return   true ;
                }
            }
             else
            {
                Response.Write( " <script language=\ " javascript\ " >alert('您未登录或长时间未操作,请重新登录');window.top.location = ' "   +  Request.ApplicationPath  +   " ';</script> " );
                 return   false ;
            }
        }

         protected   int  LoginUser_Id
        {
             get  
            {
                 if  (Session[ " loginuser_id " ]  ==   null )
                {
                     return   0 ;
                }
                 else
                {
                     return   int .Parse(Session[ " loginuser_id " ].ToString());
                }
            }
        }

         protected   string  LoginUser_Address
        {
             get  
            {
                 return  Page.Request.UserHostAddress;
            }
        }
    }
}

把一些,如页面跳转,消息提示,页面加载验证(是否登录等信息)--可以放到基类中