I am new in MVC 4 web development and i am creating a control panel. I have developed a Add user page and submit information in database successfully.
But after submit when i press back button it will show previous form.
i am using redirection the page to same page after submit form.
here is the code to redirect
public ActionResult AdminPanel(RegisterUserModel user)
{
if (ModelState.IsValid) // Check the model state for any validation errors
{
if (user.AddUserToDB(user.username, user.password, user.fullName,user.contactNo,user.COAId)) // Calls the Login class checkUser() for existence of the user in the database.
{
TempData["SuccessMessage"] = "User Added Sucessfully!";
ModelState.Clear();
return Redirect("AdminPanel");
}
else
{
ViewBag.SuccessMessage = "User Not Added";
return View();
}
}
SelectList clientsList = GetClinetList();
ViewBag.clientsList = clientsList;
return View(); // Return the same view with validation errors.
}
I have tried many examples but issue not resolved yet so kindly give my suggesstions
If you don't want the user to be able to see the previous content when clicking back, then you must indicate that content should not be cached by the browser and must revalidate with the origin server
A summary of this behaviour is here - http://blog.55minutes.com/2011/10/how-to-defeat-the-browser-back-button-cache/
You could create a nocache attribute, like this one - https://stackoverflow.com/a/10011896/1538039, and apply it to your controller methods.
Related
I am trying to send product details to user dashboard, if user is login then it should directly show on dashboard and if not then it should be ask for register then on same popup he can edit the amount and pay on next click.
I am trying to send using session however getting error.
Attempt to read property "name" on null
public function addToCart(About $about)
{
if (Auth::check()) {
if(session()->has('cart'))
{
$cart = new Account(session()->get('cart'));
}
else{
$cart= new Account();
}
$cart->add($about);
//dd($cart);
session()->put('cart', $cart);
//return redirect()->back();
return view('amount', compact('cart'));
}}
I'm new to MVC (using 4, framework 4.0) and I understand the basics but this page redirect isn't working as I expect. The application is a login/authentication which if the user successfully logs in it redirects them to the target application. That part works just fine. However the user may forget his/her login credentials, so I have a series of pages that will prompt the user for a registered email address and decoded captcha value. If that information is validated then another page prompts for a series of (up to 3) pre-determined security question answers (in the case of a password forgotten). If the security challenge question is successfully answered the user is redirected to a password change page. At any point in the process the user may click a cancel button which should redirect back to the login page and clear any state variables tracking their progress through the recovery process. The problem is I keep getting stuck on pages that even after a RedirectToAction("SomeAction", "SomeController"); I still stay on the page? The URI even changes on the browser but the page asking for email address or security question stays active. I'm using an ajax $.get() to call various actions for submit and cancel.
view is defined like this:
#using (Html.BeginForm("RecoverUserCredentialsByModel", "Account", FormMethod.Get, new { id = "form1" }))
{
<!--... three input controls and a submit and cancel button-->
<p>
<button id="btnSubmit" onclick="return CheckUserEmail()">Submit</button>
<button id="btnCancel" onclick="return CancelRecovery()">Cancel</button>
</p>
}
<script type="text/javascript">
function CheckUserEmail() {
var emailAddress = document.getElementById("EmailAddress").value;
var pictogramHref = document.getElementById("pictogramHref").src;
var pictogramAnswer = document.getElementById("Pictogram").value;
if (emailAddress != null) {
var url = "/Account/ValidateEmail";
$.get(url, { "emailAddress": emailAddress, "pictogramHref": pictogramHref, "pictogramTranslation": pictogramAnswer }, null);
return true;
}
}
</script>
<script type="text/javascript">
function CancelRecovery() {
var url = "/AuthenticationModule/Account/CancelRecovery";
$.get(url, {}, null);
return true;
}
</script>
Codebehind redirections look like:
/// <summary>
/// Global cancel recovery, clears the stateful session object and redirects back to login view
/// </summary>
/// <returns>ActionResult</returns>
[AllowAnonymous]
public ActionResult CancelRecovery()
{
LoginModel statefulLoginModel = null;
try
{
// Reset everything active and redirect to login view
statefulLoginModel = new LoginModel();
Session["LoginModel"] = statefulLoginModel;
return Redirector(statefulLoginModel);
}
catch (Exception ex)
{
// Log the error and Reset everything active and redirect to login view
FileLogger.Log(ex);
statefulLoginModel = new LoginModel();
Session["LoginModel"] = statefulLoginModel;
return Redirector(statefulLoginModel);
}
}
[AllowAnonymous]
public ActionResult Redirector(LoginModel model)
{
... some code
Session["LoginModel"] = statefulLoginModel;
if (loginState == 0)
{
RedirectToAction("LogOn");
}
}
When it hits the RedirectToAction("LogOn"); the view "RecoverUserInfo" stays active on the browser and no redirection occurs?
What am I doing wrong?
Try this..........
Proper Syntax is return RedirectToAction("ActionName","ControllerName");
In this case if Logon Action is written on the same Controller Then use following Code..
return RedirectToAction("LogOn");
or it is written on another controller then just replace your Action Name and Controller Name in the following code.
return RedirectToAction("ActionName","ControllerName");
I have an MVC project with three roles: Users, Account Managers, and Administrators.
Administrators have their own MVC Area where they have full control over Users and Account Managers. I'm trying to implement functionality to allow Administrators to view the site as any User or Account Manager.
In the Admin Area of the site, I have a View of a list of Users and Account Managers. The list contains a "View Site As User" button for each record.
I have never done anything like this before, but the ViewAs Controller Action is currently set up to create a Session with the selected User's information, like so:
ViewBag.SiteSession = Session["SiteSession"] = new SiteSession()
{
ID = user.ID,
AccountID = user.AccountID,
DisplayName = user.DisplayName,
IsManager = user.IsAdmin,
IsAdmin = false
};
The View relevant to this Action has the Model defined as a string, and nothing else but an iframe with the Model as the src attribute, like so:
#model string
<iframe src="#Model" >
</iframe>
What I'm trying to do is render whichever portion of the site was requested in this iframe. When an Administrator clicks "View As User," I'd like to direct to Home. The URL is generated through this call:
Url.Action("Index", "Home", new { Area = "" }));
The Area is set to nothing to avoid rendering the Admin Area's Home.
Currently, this is not working. I don't know where to even begin, minus what I already have.
I'm looking for any suggestions. All help is greatly appreciated, as this doesn't seem like an easy task.
If you don't know how to help, it would also be appreciated if you could direct this question to somebody that can.
Again, thanks in advance.
The way that I've done this in the past has been to use the concept of an an actual user and an effective user. Most display actions use the effective user to generate their content. Typically I've implemented it as "impersonation" rather than "preview" so the user is actually navigating the site as the user rather than displaying in a separate window. In this case I simply set both in the current session. Things that require admin permission (like switching to/from impersonation) obviously use the real user.
If you wanted to do preview then I'd think about using a parameter on each request to set the effective user. The code would need to understand to add this parameter to all links so that you could navigate in the iframe without messing up navigation in the original interface.
As for removing the area from the url, I think what you have (setting to the empty string) should work. If it's not working you might want to try lowercase area, Url.Action("Index", "Home", new { area = "" }). I'm pretty sure that the RouteValueDictionary that gets created under the hood uses a case insensitive key comparison, though, so it shouldn't matter.
For this task, I ended up creating a separate controller, ViewAsController, which had a controller-wide [Authorize] attribute that only allowed users with the Admin role to access its actions.
In the Start action, a Session object containing the selected User's information is created, like so:
[HttpGet]
public ActionResult Start(int id)
{
var user = db.Users
.First(u => u.ID == id);
Session["SiteSession"] = new SiteSession()
{
//Session data...
};
return PartialView("_IFrame");
}
This Action returns a Partial View that I ended up displaying in a jQuery UI modal dialog window.
Here's the code for that Partial View:
#{
ViewBag.SiteSession = (SiteSession)Session["SiteSession"];
}
<h2>Viewing Site As #ViewBag.SiteSession.DisplayName</h2>
<div>
<iframe src="#Url.Action("Index", "Home", new { Area = "" })"></iframe>
</div>
As you can see, it's extremely bare, and that's exactly what it needs to be. The <iframe> acts as a browser in a browser, allowing the Admin user full access to whichever Actions the selected User would.
For the sake of detail, here's the jQuery that creates the dialog and opens it:
$(function () {
$("#viewAsDialog").dialog({
modal: true,
autoOpen: false,
resizable: true,
draggable: true,
closeOnEscape: false,
height: $(window).height() * .9,
width: 1000,
closeText: '',
close: function () {
$.post("#Url.Action("End", "ViewAs", new { Area = "Admin" })")
.success(function (result) {
});
}
});
});
function viewAs(result) {
$("#viewAsDialog").html(result);
$("#viewAsDialog").dialog("open");
}
You can see here that the dialog is initialized on document-ready, and is not opened until the AJAX call that retrieves the Partial View is successfully completed.
Once the Admin closes the dialog, the server calls the End action in the ViewAs Controller, destroying the session:
[HttpPost]
public ActionResult End()
{
Session["SiteSession"] = null;
return new HttpStatusCodeResult(System.Net.HttpStatusCode.OK);
}
I'm using MVC4 with Entity Framework and like many people I'm new to MVC and trying to get my head around the design patterns.
I have a partial view that displays a list of sessions followed by actionlinks allowing the authenticated member to book into the sessions.
Note: for clarity, I've chopped out most of the code, if a member is booked into a session, it displays "Booked" instead of the action link.
#using OnlineBookings.Website.Models
#{ DateTime currentDate = DateTime.MinValue.Date; }
<form method="post" action="~/Controllers/BookSessionController.cs">
#foreach (SessionsWithBookingInformation s in Model)
{
<p>#s.StartTime.ToString("t")
#s.Description
#Html.ActionLink(
"Book",
"BookSession",
new { sessionId = s.SessionId }
)
</p>
}
</form>
This then displays as part of a larger view:
The actionlinks pass the guid of the session to be booked through to the following function in my controller, which retrieves the memberId from the cookie and uses Entity Framework to create a booking for that member and session.
public ActionResult BookSession(Guid sessionId)
{
using (var db = new OnlineBookingsEntities())
{
// see if the member id is stored in a cookie
if (Request.Cookies["memberId"] != null)
{
var memberId = new Guid(Request.Cookies["memberId"].Value);
db.Bookings.Add(new Booking
{
BookingId = Guid.NewGuid(),
MemberId = memberId,
SessionId = sessionId,
BookingTime = DateTime.Now
});
db.SaveChanges();
}
}
// this refreshes the entire page
/// is there a better way to just replace the actionlink they clicked on?
return RedirectToAction("Index", "Home");
}
All this is working nicely and bookings are being effectively recorded.
But, I'm trying to figure is if the return from the BookSession function can just update the actionlink text.
Ideally, on success, I want to replace the ActionLink in my partial view with the word "Booked" and on failure I want to replace it with the failure condition like "Session full".
Or I could just update my partial view, because that will do the same thing.
Am I missing something simple here? Or, am I barking up entirely the wrong tree?
Your question is great and really well explained, but it's also a little vague since it's a bit of a "What should I do?" question. Here are a few options that might help you develop a solution.
Redisplay the same view. Return whichever view the user was on for them to submit the link. This will look like a simple refresh.
return View();
Submit the request via AJAX and update via a partial view. Put an id tag on a span or similar HTML element with an individual booking's details inside. Submit the request with AJAX, perhaps via #Ajax.ActionLink, and have your action return a partial view.
return PartialView("_OnlineBookingPartial", model);
Once your partial view is returned, update the specific booking with the data returned.
Use AJAX again, but return JSON. Another way might be that you use AJAX again but instead you return JSON and do something with it. You could, for example, return text in which you would replace Book with; i.e. "Session full" or "Booked!".
return new JsonResult
{
Data = "Booked!"
}
Personally, I'd probably use AJAX to update with a non-AJAX (non-Javascript) fallback.
You can do this by using #Ajax.ActionLink and checking if the request is AJAX or not inside your controller action.
if (Request.IsAjaxRequest) {
return PartialView("_OnlineBookingPartial", model);
}
return View();
This means that if the browser has Javascript enabled and supports AJAX, it will be used and the whole process will be seamless and instant for the user. If Javascript is disabled, the page will simply refresh.
I like the way MVC4 manage the new logon screen: it is possible to have a modal dialog showed.
I tried to reproduce the same behavior in the same solution for another view. But it doesn't work because Request.QueryString["content"] is null. I don't know why. In fact, there is an action method called ContextDependentView (generated by the MVC template) where the trick occurred. Here it is:
private ActionResult ContextDependentView()
{
string actionName = ControllerContext.RouteData.GetRequiredString("action");
if (Request.QueryString["content"] != null)
{
ViewBag.FormAction = "Json" + actionName;
return PartialView();
}
else
{
ViewBag.FormAction = actionName;
return View();
}
}
If the value of Request.QueryString["content"] is not null then we display a partial view (modal jQuery) otherwise it is a classic view.
Can someone help me understand why this is not working?
PS: another thread already exists but without any solution.
The login and register links are bound to a click handler in AjaxLogin.js which then adds content=1 in loadAndShowDialog