.net后台页面统一验证是否登录

本文实例为大家分享了.net后台页面统一验证是否登录的具体代码，供大家参考，具体内容如下

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)
      {
    
      }

    }
  }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。