.net 后台页面统一验证是否登录

首先新写一个PageBase类

using System;
using System.Collections.Generic;
using System.Web;

namespace DepartmentMIS.Web.myclass
{
    public class PageBase : System.Web.UI.Page
    {
        public PageBase()
        {
            this.Load += new EventHandler(BasePage_Load);
        }

        private void BasePage_Load(object sender, EventArgs e)
        {
            if (Session["UserNo"] == null || Session["UserNo"].ToString() == "")
            {
                Response.Redirect("~/Login.aspx");
            }
        }
    }
}

Login页面后台部分代码

  protected void btnLogin_Click(object sender, EventArgs e)
        {
            if (rblRole.SelectedValue == "1")
            {
                DataSet ds = AdminBLL.GetList("userName = '" + tbxUserName.Text.Trim() + "' and password = '" + tbxPassword.Text.Trim()+"' and isDeleted = 0");
                if (ds.Tables[0].Rows.Count == 1)
                {
                    int id = Convert.ToInt32(ds.Tables[0].Rows[0]["id"]);
                    Session["UserNo"] = ds.Tables[0].Rows[0]["id"];
                    Session["UserName"] = ds.Tables[0].Rows[0]["userName"];
                    Response.Redirect("admin/adminIndex.aspx");
                }
                else
                {
                    Response.Write("<script>alert('用户名或密码错误！')</script>");
                }
            }
            if (rblRole.SelectedValue == "2")
            {
                DataSet ds = StuBLL.GetList("stuNo = '" + tbxUserName.Text.Trim() + "' and password = '" + tbxPassword.Text.Trim() + "' and isDeleted = 0");
                if (ds.Tables[0].Rows.Count == 1)
                {
                    int id = Convert.ToInt32(ds.Tables[0].Rows[0]["id"]);
                    Session["UserNo"] = ds.Tables[0].Rows[0]["id"];
                    Session["UserName"] = ds.Tables[0].Rows[0]["stuName"];
                    Response.Redirect("student/stusIndex.aspx");
                }
                else
                {
                    Response.Write("<script>alert('用户名或密码错误！')</script>");
                }
            }

以stuWishChoices页面为例，继承PageBase类

using System.Web.UI.WebControls.WebParts;
using System.Data.SqlClient;
using System.Collections;

namespace cbmis.ProDocumentMng
{
    public partial class DocumentList : BasePage //继承
    {
            protected void Page_Load(object sender, EventArgs e)
            {
       
            }

        }
    }
}