Transfer value from Controller to Shared View in MVC

Question

I need to send some values from controller to shared view to show in the top of

    [HttpPost]
    [Route("login")]
    public async Task<ActionResult> Login(LogInRequest logInRequest)
    {
        IEnumerable<UserClaim> UserClaims = null;
        User user = null;
        if (ModelState.IsValid)
        {
      user = await GetUserByEmailAndPassword(logInRequest.UserName, logInRequest.Password);
            if (user.Id != 0)
            {
                 showMenu = await ShowLoanMenu(logInRequest);
                if (showMenu)
                {
        ******** I need to send showMenu and user.Name to shared view
             return RedirectToAction(Constants.Views.SearchView, Constants.Views.LoanDriverController);
                }
            }
               .....
              return View(logInRequest);
    }

I don't want to use TempData, viewdata, viewbag or session, how I can send it by querystring or adding to model.

This is one of the layout:

      <ul>
            <li class="logo">
                <img src="~/Content/Images/logo.png" alt="" />
            </li>
            <li class="nav-item">
                  ***  @if(showmenu is true)
                 {
                    <ul>
                        @Html.ActionLink("Loan Driver", "Index", "Home", new { area = "" }, new { @class = "navbar-brand" })
                    </ul>
                }
            </li>
        </ul>

and this is another layout:

 <div class="header">
       <div class="master-container">
        <div class="heading">Garage</div>
        <div class="primary-nav">
            <ul>
                <li>******show name of the person</li>
                <li>@Html.ActionLink("Logout", "logout", "Home")</li>
               </ul>
           </div>
        </div>

Answer 1

In your view you can read a value from the querystring like this:

@Request.QueryString["name"]

Then it's just a matter of including the value you want in the querystring which can be handled easily enough when you do a RedirectToAction, like this:

return RedirectToAction("Details", new { id = id, name = "value" })

Answer 2

I guess you want this for the current request, not for all requests so accepted answer is not the correct way. To share data with views or child controlers within the scope of a single request, easiest way is to put your data to HttpContext.Items. This is shared by all views and child controllers during the same request.

HttpContext.Items["UIOptions"] = new UIOptions { ShowMenu = true }; 

You can abstract this with an extension:

public static class HttpContextExtensions
    {
        public static UIOptions GetUIOptions(this HttpContext httpContext)
        {
            var options = httpContext.Items["UIOptions"] ?? (object) new UIOptions();
            httpContext.Items["UIOptions"] = options;
            return options;
        }
    }

Then in your controller, set options

HttpContext.GetUIOptions().ShowMenu= true

In your view, access it like this:

ViewContext.HttpContext.GetUIOptions()

I usually abstract this further such that you configure it with attributes like

[UIOptions(ShowMenu=true)]
public ActionResult MyAction()
{
    return View();
}

So you write a ActionFilter which checks the attributes on the action and sets the httpContext.GetUIOptions() object's properties using the attribute properties during ActionExecuting phase.

Answer 3

Create one common/general class and define one public static property over there and set it's value from controller and access it in view as below:

GeneralClass:

public static class GeneralUtility
{
    /// <summary>
    /// Username
    /// </summary>
    public static string Username = "";
}

Controller:

GeneralUtility.Username ="sandip";

View:

@if(GeneralUtility.Username=="sandip")
{
    // rest of the logic
}

Answer 4

You need to pass shared model to your layout. Let say SharedModel The definition of model would be

public class SharedModel
{
  public string Name {get; set;}
  public bool IsLoggedIn {get; set;}
}

All other models will need to be inherited from SharedModel For e.g AccountModel

public class AccountModel : SharedModel
{
  public string Password {get; set;}
  public string Username {get; set;}
}

So when you pass specific model to your view, then shared model will also be passed to your shared layout.

 [HttpPost]
    [Route("login")]
    public async Task<ActionResult> Login(LogInRequest logInRequest)
    {
      AccountModel aM = new AccountModel();
      aM.Name = "Murtaza";
      aM.IsLoggedIn = false;
      ....
      ....
      return View(aM):
     }