ASP. NET Practice ①--application Chat Room

Have not written code for several years, re-practice code, do notes in this memo.

aspx page JS code:

<script type= "Text/javascript" > Function showmsg () {//timed refresh get chat content var data = "{}            "; $.ajax ({type: "POST", DataType: "JSON", ContentType: "Application/json;                    Charset=utf-8 ", url:" Webservice1.asmx/getmessagecontent ", success:function (Result) {                    var msgdiv = document.getElementById ("Messageshowdiv");                    msgdiv.innerhtml = "";                    msgdiv.innerhtml = RESULT.D;                Keep the scroll bar at the bottom msgdiv.scrolltop = msgdiv.scrollheight;        }})} var timer1 = Window.setinterval ("ShowMsg ()", 2000); Window.clearinterval (timer1) function showonlineusers () {var users = document.getElementById ("            Onlineusersshow "); $.ajax ({type: "POST", DataType: "JSON", ContentType: "Application/jsoN;charset=utf-8 ", url:" Webservice1.asmx/getonlineusers ", success:function (Result)                    {users.innerhtml = ""; var str = result.d.substring (0,result.d.lastindexof ("|")).                    Split ("|");                    var userstr = "";                    $.each (str, function (I, Val) {userstr + = val + "<br/>";                }) users.innerhtml = Userstr;        }})} var timer2 = Window.setinterval ("Showonlineusers ()", 10000); Window.clearinterval (timer2) function sendmsg () {var txt = document.getElementById ("Txtmessage            ");                if (Txt.value.length > 0) {var msgdata = "{Msg: '" + $ ("#txtMessage"). Val () + "'}";                    $.ajax ({data:msgdata, type: "POST", DataType: "JSON", ContentType: "ApplicatioN/json;                        Charset=utf-8 ", url:" Webservice1.asmx/sendmsg ", success:function (Result) {                            if (Result.d = = "true") {showmsg ();                        Txt.value = ""; } else if (result.d = = "Outtime") {alert ("Login timeout, please login again!")                            ");                        window.location.href = ' _login.aspx ';                        } else {alert ("Communication sent Error:" + RESULT.D);                    }}, Error:function (e) {alert (E.D);            }                });            } else {alert ("Please enter content to send again ..."); }} </script>

　　

　　

ASMX code:

[WebMethod (Description = "Get chat history", EnableSession = True)] public string getmessagecontent () {if ( application["message"] = = null) {return ' no chat information currently.            ";            } int length = Convert.ToInt32 (session["messagelength"]); return application["Message"]. ToString ().        Substring (length);            } [WebMethod (Description = "Send chat content", EnableSession = True)] public string sendmsg (string Msg) {            Verify that the user is logged in timeout if (session["UserName"] = = null) {return ' outtime ';                } try {//user [TIME]: content String message = Msg.trim (); String username = session["username"].                ToString ();                String datenow = DateTime.Now.ToLongTimeString ();                String msg = Username + "[" + Datenow + "]:" + message + "<br/>";                Application.Lock (); application["Message"] = Application["Message"].                ToString () + msg;                Application.UnLock ();            Return "true"; } catch (Exception ex) {return ex.            ToString (); }} [WebMethod (Description = "Get online user")] public string getonlineusers () {if (applic            ation["onlinepersons"] = = null) {return ""; } return application["Onlinepersons"].        ToString (); }

Post-Login CS code:

        protected void Btnlogin_click (object sender, EventArgs e)        {            //record user name            session["username"] = username. Value;            Increase Online user            application.lock ();            application["Online"] + = Username. Value + "|";            Application.UnLock ();            Record the length of chat messages that exist at logon, only show chat messages that occur after login            session["messagelength"] = 0;            Application.Lock ();            session["messagelength"] = application["Message"]. ToString (). Length;            Application.UnLock ();            Jump page            Response.Redirect ("_showmessage.aspx");        }

　　

Source Code Link: http://pan.baidu.com/s/1o7WuTGu

ASP. NET Practice ①--application Chat Room