简单的Session登录

Login前台页面

    <form id="form1" action ="" method="post">

        <input type="text" name="txtN" />

        <input type="password" name="txtP" />

        <input type="submit" value="登陆" />

    </form>

 Login后台页面

 protected void Page_Load(object sender, EventArgs e)

        {

            if (Request.HttpMethod.ToLower() == "post")

            {

                string strN = Request.Form["txtN"];

                string strP = Request.Form["txtP"];

                //登录成功

                if (strN == "admin" && strP == "123")

                {

                    //将用户名存入Session中

                    //Context.Session

                    Session["cname"] = strN;

                    //让浏览器重定向到首页

                    Response.Redirect("SessionIndex.aspx");

                }

            }

        }

 index后台页面

  protected void Page_Load(object sender, EventArgs e)

        {

            if (Session["cname"] != null && !string.IsNullOrEmpty(Session["cname"].ToString()))

            {

                Response.Write("欢迎您登录~~：" + Session["cname"].ToString());

            }

            else

            {

                Response.Write("<script>alert('您还没有登录~~！');window.location='SessionLogin.aspx';</script>");

                Response.End();

            }

        }

 为了防止浏览器禁用Cookie时无法正常访问我们需要在Web.config中添加如下代码

//<system.web>添加如下代码，让浏览器能正常访问

      <sessionState cookieless="AutoDetect"></sessionState>