MVC5----User Login and Verification code

Write and record the learning process

Landing

Add Add in Models

 Public classLoginviewmodel {[Required (errormessage="*")] [Display (Name="Agency number")]         Public stringUserName {Get;Set; } [Required (ErrorMessage="*"] [DataType (Datatype.password)] [Display (Name="Password")]         Public stringPassWord {Get;Set; } [Required (ErrorMessage="*")] [Display (Name="Verification Code")]         Public stringcodeimg {Get;Set; }  Public stringerrormsg {Get;Set; } }

Views Code:

Which errormsg me to display the error message, other good methods do not know ...

@using (Html.BeginForm ("Login","Admin",New{ReturnUrl = Viewbag.returnurl}, FormMethod.Post,New{@class ="Form-horizontal", role ="form"}) {@Html. AntiForgeryToken () @Html. ValidationSummary (true)            <divclass="Login_mid_right"> <divclass="Login_mid_right_ul"> <divclass="Form-group">@Html. labelfor (M= M.username,New{@class ="col-md-3 Control-label" })                        <divclass="col-md-8">@Html. textboxfor (M= M.username,New{@class ="Form-control" })                        </div> @Html. validationmessagefor (M =m.username)</div> <divclass="Form-group">@Html. labelfor (M= M.password,New{@class ="col-md-3 Control-label" })                        <divclass="col-md-8">@Html. passwordfor (M= M.password,New{@class ="Form-control" })                        </div> @Html. validationmessagefor (M =M.password)</div> <divclass="Form-group">@Html. labelfor (M= M.codeimg,New{@class ="col-md-3 Control-label" })                        <divclass="col-md-4">@Html. textboxfor (M= M.codeimg,New{@class ="Form-control" })                                                    </div> @Html. validationmessagefor (M =m.codeimg)&nbsp;&nbsp; class="codeimg"title="can't see Clearly, click Refresh"alt="can't see Clearly, click Refresh"Src="/extensions/codeimg.ashx"onclick="javascript:this.src=this.src+ '? rnd= ' + math.random ();"/> </div> <divclass="Form-group"> <divclass="col-md-offset-3 col-md-9"> <input type="Submit"Value="Login" class="BTN-LG Btn-default"/> </div> </div> <divclass="Form-group"> <divclass="col-md-offset-3 col-md-9">@Html. validationmessagefor (M=m.errormsg)</div> </div> </div> </div>        }

Login verification, in the corresponding controllers:

 Public classAdmincontroller:controller {PrivateSimondbcontext db =NewSimondbcontext (); //        //GET:/admin/         PublicActionResult Index () {returnView (); }         PublicActionResult Login () {returnView (); }         PublicActionResult loginout () {session.clear ();            Session.Abandon (); returnRedirecttoaction ("Login","Admin"); } [HttpPost] PublicActionResult Login ([Bind (Include ="username,password,codeimg")] Loginviewmodel Login,stringreturnUrl) {            //return View ();            if(modelstate.isvalid) {inti =9; if(session["Checkcode"]. ToString ()! =Login. Codeimg.toupper ()) {Modelstate.addmodelerror ("errormsg","The verification code is not correct! "); }                Else{i=Authentication (login. UserName, Common.Helper.Encryption.SHA256 (login.                PassWord)); }                if(i = =0)                {                    //Cookies//HttpCookie cookie = new HttpCookie ("User"); //cookies. Values.add ("UserName", login.                    UserName); //Response.Cookies.Add (cookie); //Sessionsession["UserName"] =Login.                    UserName; returnRedirecttoaction ("Index","Admin"); }                Else if(i = =1) {Modelstate.addmodelerror ("errormsg","the user has been disabled! "); }                Else{modelstate.addmodelerror ("errormsg","The password or user name is wrong! "); }            }            returnView ("Login"); }        /// <summary>        ///Login Verification/// </summary>        /// <param name= "UserName" ></param>        /// <param name= "Pass" ></param>        /// <returns>        ///0: Login Successful///1: The user has been disabled///9: Wrong password or user name/// </returns>         Public intAuthentication (stringUserName,stringPass) {            intres =0; Adminmanager am= db. Adminmanager.singleordefault (c = C.username = =userName); if(AM = =NULL)            {                return 9; }            if(AM.) Flag! ="1")            {                return 1; }            if(AM.) PassWord! =Pass) {                return 9; }            returnRes; }    }

Do the landing, on other pages need to add to verify whether to login, add Userauthorizeattribute

 Public classUserauthorizeattribute:authorizeattribute {protected Override BOOLAuthorizecore (HttpContextBase HttpContext) {if(HttpContext = =NULL)            {                Throw NewArgumentNullException ("HttpContext"); }            if(httpcontext.current.session["UserName"] ==NULL)            {                               return false; }            return true; }    }

Add [Userauthorize] on a controller that requires validation

MVC5----User Login and Verification code