Ajax简单聊天B/S

Ajax简单聊天B/S

 

需要一个ajaxserver页面，一个聊天记录txt文件

js部分

Talk = function () 
{
 }
Talk.prototype =
{
    AjaxPagePath: "AjaxHandler.ashx",
    ShowDivID: "divTalkList",
    CrrentCount: 0,
    UserName:null,
    AppendTalk: function (divid, meg)
    {
        document.getElementById(divid).innerHTML += meg;
    },
    GetTalk: function (talk)
    {
        if (talk == undefined)
        {
            talk = this;
        }
        $.ajax({
            type: "POST",
            url: talk.AjaxPagePath,
            data: { "op": "GetTalk", "Count": talk.CrrentCount, "Date": new Date() },
            success: function (m)
            {
                var ms = m.split('@');
                talk.AppendTalk(talk.ShowDivID, ms[1]);
                talk.CrrentCount = ms[0];
            }
        });
    },
    RefreshTalk: function ()
    {
        var t = this;
        $.ajax({
            type: "POST",
            url: t.AjaxPagePath,
            data: { "op": "RefreshTalk", "Count": t.CrrentCount, "Date": new Date() },
            success: function (m)
            {
                if (m == "1")
                {
                    t.GetTalk(t);
                    
                }
            }
        });
        setTimeout(function ()
        {
           t.RefreshTalk();
        }, 1000);
    },
    SubmitTalk: function ()
    {
        var meg = $("#txtInput").val();
        var t = this;
        $.ajax({
            type: "POST",
            url: t.AjaxPagePath,
            data: { "op": "Talk", "Talk": meg, "UserName": t.UserName, "Date": new Date() },
            success: function ()
            {
                t.GetTalk(t);
            }
        });
    }
}

aspx部分
调用Js

 <script src="Script/jquery-1.4.1.min.js" type="text/javascript"></script>
<script src="Script/talk.js" type="text/javascript"></script>
    <script type="text/javascript">
        var cTalk = new Talk();
        cTalk.CrrentCount = 0;
        cTalk.RefreshTalk();//定时查看是否有新纪录
        cTalk.UserName = "client";
    </script>

 <div id="divTalkList" style="80%; height:40%; border:1px solid #000000; overflow:scroll"></div>
    <div><input type="text" id="txtInput" /><input type="button" value="Submit" onclick="cTalk.SubmitTalk();" />
     <input id="btnRefresh" type="button" value="刷新"  onclick="cTalk.RefreshTalk()" /><!--手动刷新测试用--></div>

 ajaxserver 部分

public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = "text/plain";

 　　　　string talkPath = @"/TextFile.txt";        
        string op = context.Request["op"];
        String rootPath =context.Server.MapPath("~");
        string path1 =rootPath+ talkPath;

        if (op == "Talk")
        {
            string talk =context.Request["UserName"]+":"+ context.Request["Talk"]+System.Environment.NewLine;
            count++;
            File.AppendAllText(path1, talk, System.Text.Encoding.UTF8);
            //context.Response.Write(count);   
        }

        if (op == "RefreshTalk")
        {
            string[] lastMegs = File.ReadAllLines(path1, System.Text.Encoding.UTF8);
            count = lastMegs.Length;
            if (int.Parse(context.Request["Count"]) < count)
            {
                context.Response.Write("1");
            }
            else 
            {
                context.Response.Write("0"); 
            }
        }

        if (op=="GetTalk")
        {
            string takl = GetTalk(path1, int.Parse(context.Request["Count"]));
            context.Response.Write(count+"@"+takl);              
        }      
        
    }

    string GetTalk(string path1, int currentCount)
    {
        string[] lastMegs = File.ReadAllLines(path1, System.Text.Encoding.UTF8);
        count = lastMegs.Length;
        string lastMeg = string.Empty;
        if (currentCount < count)
        {
            for (; currentCount < count; )
            {
                lastMeg += lastMegs[currentCount] + "<br/>";
                currentCount++;
            }
            return lastMeg;
        }
        return null;
    }
 
    public bool IsReusable {
        get {
            return false;
        }
    }

}

 

 

 

标签: ajax 聊天