015. asp.net实现简易聊天室
通过Application和Session来实现简单的聊天室和在线用户数统计
Global.asax代码:
<%@ Application Language="C#" %>
<script runat="server">
void Application_Start(object sender, EventArgs e)
{
Application["count"] = ;
// 在应用程序启动时运行的代码
//建立用户列表
string user = "";//用户列表
Application["user"] = user;
Application["userNum"] = ;//用户数
string chats = "";//聊天记录
Application["chats"] = chats;
//当前的聊天记录数
Application["current"] = ;
}
void Application_End(object sender, EventArgs e)
{
// 在应用程序关闭时运行的代码
Application["user"] = "";
Application["chats"] = "";
}
void Application_Error(object sender, EventArgs e)
{
// 在出现未处理的错误时运行的代码
}
void Session_Start(object sender, EventArgs e)
{
//在新会话启动时运行的代码
Application.Lock();
Application["count"] = (int)Application["count"] + ;
Application.UnLock();
}
void Session_End(object sender, EventArgs e)
{
//在会话结束时运行的代码。
// 注意: 只有在 Web.config 文件中的 sessionstate 模式设置为
// InProc 时，才会引发 Session_End 事件。如果会话模式
//设置为 StateServer 或 SQLServer，则不会引发该事件。
Application.Lock();
Application["count"] = (int)Application["count"] - ;
Application.UnLock();
}
</script>
web.config代码:
<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0"/>
<sessionState mode="InProc"></sessionState>
</system.web> </configuration>
Login.aspx代码:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Login.aspx.cs" Inherits="Login" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>登录</title>
<style type="text/css">
.style1
{
width: 377px;
height: 209px;
}
.style2
{
width: 89%;
height: 162px;
}
.style3
{
height: 29px;
}
.style4
{
height: 39px;
}
.style5
{
height: 39px;
width: 103px;
}
.style6
{
height: 29px;
width: 103px;
text-align: right;
}
.style7
{
width: 103px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div> </div>
<asp:Label ID="lblCount" runat="server" Text="Label"></asp:Label>
<table align="center" cellpadding="0" cellspacing="0" class="style1" >
<tr>
<td>
<table align="center" cellpadding="0" cellspacing="0" class="style2">
<tr>
<td class="style5">
</td>
<td class="style4" colspan="2">
</td>
</tr>
<tr>
<td class="style6">
昵称：</td>
<td class="style3">
<asp:TextBox ID="TextBox1" runat="server" Width="113px"></asp:TextBox>
</td>
<td class="style3">
<asp:Button ID="btnLogin" runat="server" Font-Size="9pt" OnClick="btnLogin_Click"
Text="登录" />
<asp:Button ID="btnExit" runat="server" Font-Size="9pt" OnClick="btnExit_Click" Text="退出" />
</td>
</tr>
<tr>
<td class="style7">
</td>
<td colspan="2">
</td>
</tr>
</table>
</td>
</tr>
</table>
</form>
</body>
</html>
Login.aspx.cs代码:
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)
{
lblCount.Text = "您是第" + Application["count"].ToString() + "位访客";//网站人数统计 int P_int_judge = ;
P_int_judge = Convert.ToInt32(Request["value"]); //value的值就是P_int_judge的值
if (!IsPostBack) //IsPostBack 获取一个值，该值指示页是第一次呈现还是为了响应回发而加载
{
if (P_int_judge == )
Response.Write("<script>alert('该用户已经登录！')</script>");
}
}
protected void btnLogin_Click(object sender, EventArgs e)
{
Application.Lock();
int P_int_num; //在线人数
string P_str_name; //登录用户
string P_str_names; //已在线的用户名
string[] P_str_user; //用户在线数组
P_int_num = int.Parse(Application["userNum"].ToString());
if (TextBox1.Text == "")
{
Response.Write("<script>alert('用户名不能为空')</script>");
TextBox1.Focus();
}
else
{
P_str_name = TextBox1.Text.Trim();
P_str_names = Application["user"].ToString();
P_str_user = P_str_names.Split(',');
for (int i = ; i <= P_int_num - ; i++)
{
if (P_str_name == P_str_user[i].Trim())
{
int P_int_judge = ;
Response.Redirect("Login.aspx?value=" + P_int_judge);
}
}
if (P_int_num == )
Application["user"] = P_str_name.ToString();
else
Application["user"] = Application["user"] + "," + P_str_name.ToString();
P_int_num += ;
Application["userNum"] = P_int_num;
Session["userName"] = TextBox1.Text.Trim();
Application.UnLock();
Response.Redirect("Chat.aspx");
}
}
protected void btnExit_Click(object sender, EventArgs e)
{
Page.ClientScript.RegisterStartupScript(GetType(),"", "<script>window.opener=null;window.open('','_self');window.close();closeCurrentWindow</script>",true);
}
}
chat.aspx代码:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Chat.aspx.cs" Inherits="Default2" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
</div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:ListBox ID="lbList" runat="server" Height="345px" Width="180px"></asp:ListBox> <asp:TextBox ID="txtContent" runat="server" Height="345px" TextMode="MultiLine" Width="380px"></asp:TextBox>
<br />
<asp:Timer ID="Timer1" runat="server" Interval="1000" ontick="Timer1_Tick">
</asp:Timer> </ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:TextBox ID="txtMessage" runat="server" Width="316px"></asp:TextBox>
<asp:Button ID="btnSend" runat="server" onClick="btnSend_Click" Text="发送" />
<asp:Button ID="btnExit" runat="server"
Text="退出" onclick="btnExit_Click" />
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
Chat.aspx.cs代码:
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq; public partial class Default2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{ }
protected void Timer1_Tick(object sender, EventArgs e)
{
txtContent.Text = "";
int P_int_current = Convert.ToInt32(Application["current"]); //current当前聊天记录的总数
ArrayList ItemList = new ArrayList();
Application.Lock();
string P_str_names; //已在线的用户名
string[] P_str_user; //用户在线数组
int P_int_num = Convert.ToInt32(Application["userNum"]);
P_str_names = Application["user"].ToString();//用户名, 其实是一个以 , 分割的字符串的组织形式
P_str_user = P_str_names.Split(',');
for (int i = (P_int_num - ); i >= ; i--)
{
if (P_str_user[i].ToString() != "")
ItemList.Add(P_str_user[i].ToString());
}
lbList.DataSource = ItemList;
lbList.DataBind(); //绑定用户名
string P_str_chats = Application["chats"].ToString();
string[] P_str_chat = P_str_chats.Split(',');
//往文本框中写入聊天记录
for (int i = P_str_chat.Length - ; i >= ; i--)
{
if (P_int_current == )
{
txtContent.Text = P_str_chat[i].ToString();
}
else
{
txtContent.Text = txtContent.Text + "\n" + P_str_chat[i].ToString();
}
}
Application.UnLock();
UpdatePanel1.Update(); //UpdatePanel用来实现局部更新
}
protected void btnSend_Click(object sender, EventArgs e)
{
if (Session["userName"] == null || Session["userName"].ToString().Length<=)
{
return;
}
int P_int_current = Convert.ToInt32(Application["current"]);
Application.Lock();
if (P_int_current == || P_int_current > )
{
P_int_current = ;
Application["chats"] = Session["userName"].ToString() + "说：" + txtMessage.Text.Trim() + "(" + DateTime.Now.ToString() + ")";
}
else
{
Application["chats"] = Application["chats"].ToString() + "," + Session["userName"].ToString() + "说：" + txtMessage.Text.Trim() + "(" + DateTime.Now.ToString() + ")";
}
P_int_current += ;
Application["current"] = P_int_current;
Application.UnLock();
UpdatePanel2.Update();//更新局部面板
}
protected void btnExit_Click(object sender, EventArgs e)
{
Application.Lock();
string P_str_userName = Application["user"].ToString();
Application["user"] = P_str_userName.Replace(Session["userName"].ToString(), "");
Session["userName"] = ""; //清空session
string astr = Application["user"].ToString();
Application.UnLock();
Response.Redirect("Login.aspx");//退出后转到登录界面
}
}
Login.aspx截图:
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" 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