Get captcha effects and background code

Client js+html Code

<script type= "Text/javascript" > var tcode = 0;//Timer return code//Get Verification Code function getverifycodeaction () {            var email = $ ("#email"). Val ();            if (!checkemail (email)) {$ ("#area_error"). AddClass ("Log-tips"). Show (). text (emailformatisfault);//Mailbox Format error                    } else {$.ajax ({type: "Post", Async:false,                    URL: "/handler/sendmsgtomail.ashx", data: {op:12, email:email},                        Success:function (Result) {var data = parseint (result); Switch (data) {Case 1: $ ("#area_error"). AddClass ("Log-tips"). Sh ow (). text (checkverifycode);//The verification code has been sent, please pay attention to check the $ ("#btnSendCode"). Removeattr ("onclick");//Remove Send verification code                The Click event Tcode = SetInterval ("Resend ()", 1000);//Set timer, 60 seconds after allowing to send again                Break                                Case-1: $ ("#area_error"). AddClass ("Log-tips"). Show (). text (fillemail);//Please enter your email                            Break                                Case-2: $ ("#area_error"). AddClass ("Log-tips"). Show (). text (mailnotreg);//Mailbox not registered                            Break                                Case-3: $ ("#area_error"). AddClass ("Log-tips"). Show (). text (operateexception);//Operation exception                            Break                                Case-4: $ ("#area_error"). AddClass ("Log-tips"). Show (). text (operateexception);//Operation exception                            Break                                Case-5: $ ("#area_error"). AddClass ("Log-tips"). Show (). text (onceminute);//can only be sent once per minute                            Break Default: $ ("#area_error"). ADDCLass ("Log-tips"). Show (). text (operateexception);//operation exception break;            }                    }                });        } return false;            }//Click to enter next function GoNext () {$ ("#area_error"). Removeclass ("Log-tips"). Text (""). Hide ();            var email = $ ("#email"). Val ();                if (!checkemail (email)) {$ ("#area_error"). AddClass ("Log-tips"). Show (). text (emailformatisfault);//mailbox format is incorrect            return false;            } var Vcode = $ ("#verify"). Val ();                if (Vcode = = "") {$ ("#area_error"). AddClass ("Log-tips"). Show (). text (fillverifycode);//Please enter a verification code            return false;                }//Determine if the verification code is correct $.ajax ({type: "post", url: "/handler/members.ashx", Data: {op:14, Email:email, Vcode:vcode}, Success:function (Result) {if (R        Esult = = "1") {                $ ("#area_error"). AddClass ("Log-tips"). Show (). text (vcodeisnotavailable);//Verification Code expired} if (result = = "1") {window.location = "forgot_password.aspx?email=" + Email + "&                    Vcode= "+ Vcode;        }                }            });            }//Timer function resend () {var wait60second= "60 seconds after re-send";            var totalcount = $ ("#hf_timecount"). Val ();            TotalCount = TotalCount-1;            $ ("#hf_timecount"). Val (TotalCount);            if (TotalCount = = 0) {resetsendmail ();            } else {$ ("#btnSendCode"). Text (Wait60second.replace ("TotalCount")); }        }
Reattach Send mailbox Event function Resetsendmail () {clearinterval (tcode);            $ ("#hf_timecount"). Val ("60");            $ ("#btnSendCode"). Text ("Get Verification Code");        $ ("#btnSendCode"). attr ("onclick", "getverifycodeaction ()"); } </script>
<input id= hf_timecount "value=" type= "hidden"/>
<input type= "text" name= "email" id= "email"/>
<button type= "button" id= "Btnsendcode" onclick= "Getverifycodeaction ()" > Get Verification Code </button>
<input type= "Text" name= "Verify" id= "Verify"/>
<input type= "button" id= "Btn_next" value= "Next" onclick= "GoNext ()"/>

　　

Service-Side code:

<summary>//e-mail///</summary>//<param name= "context" ></param>            <returns></returns> public String SendMail (HttpContext context) {try {if (!string.                IsNullOrEmpty (Cookieshelper.getcookie ("Send_mail_limit")) {return "-5";//can only be sent once per minute } string email = context.                request["email"]; if (string. IsNullOrEmpty (email) | | ! Commonhelper.isvalidemail (email)) {return "-1";//value is null}/ /determine if the message exists in the BLL. Web.member bllmember = new BLL.                Web.member ();                int mailcount = bllmember.getcountbyemail (email);                Models.Web.Member Member = bllmember.getmodelbyemail (email);                if (Mailcount = = 0 | | member = = NULL) {return "-2";//does not exist} StrinG Vcode = Commonhelper.randcode (8);                Models.Web.VerifyCode model = new Models.Web.VerifyCode ();                Model.v_code = Vcode;                Model.v_createdate = DateTime.Now;                Model.v_enddate = DateTime.Now.AddHours (2);                Model.v_status = 0;                Model.v_email = email; Bll. Web.verifycode BLLVC = new BLL.                Web.verifycode ();                int no = Bllvc.append (model);                    if (No > 0) {string sendText = ""; String TempPath = context.                    Server.MapPath ("~/emailtemp/modifypwd.txt"); using (StreamReader sr = new StreamReader (TempPath)) {SendText = Sr.                    ReadToEnd (); } SendText = Sendtext.replace ("{username_ch}", member.                    Persnalname); SendText = Sendtext.replace ("{username_en}", member.                    Persnalname); SendText = Sendtext.replace("{Vcode}", Vcode);                    Commonhelper.sendemail (email, sendText, Resource.Lang.RetrievePassword);                Cookieshelper.setcookie ("Send_mail_limit", "SendMail", 1.00);                } else {return "-3";//verification code generated an exception, please try again!            } return "1";//Success} catch (Exception) {return "-4";//exception }        }

　　

Get captcha effects and background code