asp.net在线WEB聊天室(基于Application实现)

【实例截图】

【核心代码】

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

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        
    }
    protected void btn_Send_Click(object sender, EventArgs e)
    {
        int P_int_current = Convert.ToInt32(Application["current"]);
        Application.Lock();
        if (P_int_current == 0 || P_int_current > 20)
        {
            P_int_current = 0;
            Application["chats"] = Session["userName"].ToString()   "说:"   txt_Message.Text.Trim()   "("   DateTime.Now.ToString()   ")";
        }
        else
        {
            Application["chats"] = Application["chats"].ToString()   ","   Session["userName"].ToString()   "说："   txt_Message.Text.Trim()   "("   DateTime.Now.ToString()   ")";
        }
        P_int_current  = 1;
        Application["current"] = P_int_current;
        Application.UnLock();
        txt_Message.Text = "";
        txt_Message.Focus();
    }
    protected void btn_Quit_Click(object sender, EventArgs e)
    {
        Application.Lock();
        string P_str_userName = Application["user"].ToString();
        Application["user"] = P_str_userName.Replace(Session["userName"].ToString(), "");
        Application.UnLock();
        Response.Write("<script>window.close();</script>");
    }
}