聊天室.aspx:<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="聊天室.aspx.cs" Inherits="_10_25.聊天室" %>
<!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></title>
<style type="text/css">
#ltmessage
{
height: 189px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div>
<table>
<tr><td colspan="4">在線聊天：<img src="pic.aspx" />人</td></tr>
<tr><td colspan="4"><div id="ltmessage" runat="server"></div></td></tr>
<tr><td colspan="3">請輸入你的姓名：</td><td><asp:TextBox ID="name" runat="server"
Width="228px"></asp:TextBox></td></tr>
<tr><td>請選擇表情：</td>
<td><asp:DropDownList ID="DropDownList1" runat="server"
onselectedindexchanged="DropDownList1_SelectedIndexChanged">
<asp:ListItem Value="悲傷">悲傷</asp:ListItem>
<asp:ListItem Value="暈">暈</asp:ListItem>
<asp:ListItem>高興</asp:ListItem>
</asp:DropDownList>
</td></tr>
<tr><td colspan="3">請輸入你的消息：</td><td>
<asp:TextBox ID="message" runat="server"
Height="116px" Width="224px"></asp:TextBox></td></tr>
<tr><td colspan="3"><asp:Button ID="Button1" runat="server" Text="發送消息"
οnclick="Button1_Click" /></td><td>
<asp:Button ID="Button2" runat="server" Text="清除日誌" οnclick="Button2_Click" /></td></tr>
</table>
</div>
</form>
</body>
</html>
聊天室.aspx.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace _10_25
{
public partial class 聊天室 : System.Web.UI.Page
{
Dictionary<string, string> img;
protected void Page_Load(object sender, EventArgs e)
{
img= new Dictionary<string, string>();
if (!IsPostBack)
{
ltmessage.InnerHtml = Application["ms"].ToString() + "<br/>";
}
}
protected void Button1_Click(object sender, EventArgs e)
{
switch (DropDownList1.SelectedValue)
{
case "高興":
img["圖片"] = "<img src=img/高興.gif/ width='20px'>";
break;
case "悲傷":
img["圖片"] = "<img src=img/悲傷.gif/ width='20px'>";
break;
case "暈":
img["圖片"] = "<img src=img/暈.gif/ width='20px'>";
break;
}
Application.Lock();
Application["ms"] = Application["ms"] + "<br/>" + name.Text + ":" + message.Text + img["圖片"];
Application.UnLock();
string msg = Application["ms"].ToString();
ltmessage.InnerHtml = msg;
if (msg.Length >= 500)
{
Application["ms"] = "";
}
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
}
protected void Button2_Click(object sender, EventArgs e)
{
ltmessage.InnerHtml = "";
}
}
}
global.asax:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.SessionState;
namespace _10_25
{
public class Global : System.Web.HttpApplication
{
protected void Application_Start(object sender, EventArgs e)
{
Application["count"] = 0;
Application["ms"] = "";
}
protected void Session_Start(object sender, EventArgs e)
{
Application["count"] = Convert.ToInt32(Application["count"]) + 1;
}
protected void Application_BeginRequest(object sender, EventArgs e)
{
}
protected void Application_AuthenticateRequest(object sender, EventArgs e)
{
}
protected void Application_Error(object sender, EventArgs e)
{
}
protected void Session_End(object sender, EventArgs e)
{
Application["count"] = Convert.ToInt32(Application["count"]) - 1;
}
protected void Application_End(object sender, EventArgs e)
{
}
}
}
pic.aspx.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace _10_25
{
public partial class pic : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
using (System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(20, 20))
{
using(System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap))
{
g.Clear(System.Drawing.Color.White);
g.DrawString(Application["count"].ToString(), new System.Drawing.Font("宋體", 20), System.Drawing.Brushes.Blue, 0, 0);
}
bitmap.Save(Response.OutputStream , System.Drawing.Imaging.ImageFormat.Jpeg);
}
}
}
}