登录页面
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;
public partial class Login : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
//1.判断用户名密码是否正确,2.给服务器写cookie 存用户名但是不存密码
if (txtloginId.Text != "")
{
HttpCookie user = new HttpCookie("user");
user["name"] = txtloginId.Text;
user.Expires = DateTime.Now.AddDays(5);
Response.Cookies.Add(user);//写到Respon中,由他写入浏览器
//2.存登录时间
HttpCookie loginTime = new HttpCookie("time");
loginTime["lastTime"] = DateTime.Now.ToShortDateString();
user.Expires = DateTime.Now.AddDays(5);
Response.Cookies.Add(loginTime);
//3.跳转页面
Response.Redirect("Main.aspx");
}
}
}
(登录页面没有问题)
主页面
(还包含发送消息和展示消息,此处主要接收用户名和登录时间)
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;
public partial class Main : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
HttpCookie user = Request.Cookies["user"];
if (user != null)
{
String name = user["name"];
lblLoginDate.Text = name + " welcome ";
}
HttpCookie loginTime = Request.Cookies["time"];
if (loginTime != null)
{
String time = loginTime["lastTime"];
lblLoginDate.Text = lblLoginDate.Text +"login time"+ time;
}
}
}
发送消息
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;
public partial class SendMessage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnSendMessage_Click(object sender, EventArgs e)
{
HttpCookie user = Request.Cookies["user"];
if (user != null)
{
string name = user["name"].ToString() ;
string mess = txtMessage.Text.ToString();
Application.Lock();
Application["name"]= name;
Application["mess"] = mess;
Application.UnLock();
}
}
}
展示消息
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;
public partial class ShowMessage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Application.Lock();//一定要写
string name = Application["name"].ToString();
string mess = Application["mess"].ToString();
Application.UnLock();
txtShowMessage.Text += name + "说:" + mess+"\n";
}
}
刚开始没写Lock和UnLock,一直报错“未将对象引用设置到对象的实例”,搜半天都说是取不到值,没改好突然想到Lock和UnLock,加上之后消息可以显示了但是需要刷新而且只显示最新一条