WebApplication/Index.Master.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication
{
    public partial class Index : System.Web.UI.MasterPage
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!this.IsPostBack)
            {
                if (Session["studentid"] != null)
                {
                    nologin.Visible = false;
                    islogin.Visible = true;
                    Literal1.Text = "<span style='color:red'>您好：" + Session["uname"].ToString() + "！</span>";
                }
                if (Session["teacherid"] != null)
                {
                    nologin.Visible = false;
                    islogin.Visible = true;
                    Literal1.Text = "<span style='color:red'>您好：" + Session["uname"].ToString() + "！</span>";
                }
                //bind();
            }
        }

        public string ReturnLink()
        {
            if (Session["studentid"] != null) { return "UserInfo.aspx"; }
            else if (Session["teacherid"] != null) { return "TeacherCenter.aspx"; }
            else { return ""; }
        }

        protected void LinkButton1_Click(object sender, EventArgs e)
        {
            Session["studentid"] = null;
            Session["teacherid"] = null;
            Session["uname"] = null;
            Literal1.Text = "";
            nologin.Visible = true;
            islogin.Visible = false;
            Response.Redirect("Index.aspx");
        }
    }
}