MVC 4 How Pass Data Correctly from Controller to View

MVC 4 how pass data correctly from controller to view

You should create a ViewModel with all of your data needed and then pass that down to the view.

public class ViewModel 
{
   public List<int> Melt1 { get; set; }

   public void LoadMeltProperties() 
   {

       if (Melt1 == null) 
       {
          Melt1 = new List<int>();
       }

       Melt1 = (from item in db.tbl_dppITHr
       where item.ProductionHour >= StartShift && item.ProductionHour <= EndDate
       select item).Sum(x => x.Furnace1Total).ToList();
   }

   public ViewModel Load()
   {
       LoadMeltProperties();
       return this;
   }
}

public ActionResult YourControllerAction() 
{
      var vm = new ViewModel().Load();
      return View("ViewName", vm);
}

Then in your View you can use a strongly typed model rather than dynamic

@model ViewModel

You can then iterate over your ViewModel properties via:

foreach(var melt in Model.Melt1) {
     // do what you require
}

EDIT NEW Pass data from the controller to the view using HttpPost

It would be easier for you to create a View Model and put the data in it and >return to View with the filled ViewModel Object this could look sth like this

The View Model

   public class PartialTableEcpModel
   {
      public List<string> Days {get; set;}
      //And so on

  }

The Controller

   public ActionResult PartialTabelaEcp(string json)
   { 
       PartialTableEcpModel tableModel = new PartialTableEcpModel();
       tableModel.Days = new List<string>() {"Day1", "Day2", Day3};
       var nr_days= 31;
       ViewBag.days= nr_days;
       return PartialView("_TableEve", tableModel);
   }

The Razor View

   @model PartialTableEcpModel 
   @foreach(var day in Model.Days)
   {
    <p>@day</p>//or whatever
   }

so it is again for a Get request

For Edit

you have to set the @model thing at the top of the RazorView.cshtml to your model, then the Model property in your is the Model you push in the Controller

Passing data from a controller to a view (MVC)

in your foreach you need to use the variable that you have defined. In this situation I don't think you need the helper. Try changing your code to

@foreach(var invalid in ViewBag.InvalidParts){
    <text>
        <h2>@invalid</h2> 
    </text>
}

MVC 4 - Pass Data from View = Controller

Posting as an answer as this is too long to comment. I have tried to recreate and it is all working here so I thought I would post what I have so you can compare with what you are doing:

I am assuming that Kauf.Value is a string here...

Controller

[HttpGet]
public ActionResult Create()
{
    // Setup model before passing in
    var model = new Bond();
    return View(model);
}

[HttpPost]
public ActionResult Create(Bond position)
{
    string theValue = position.Kauf.Value;
    // At this point "theValue" contains a valid item
    return View(position);
}

View

@model MvcExperiments.Models.Bond

@using(@Html.BeginForm())
{
    <div class="editor-field">
        @Html.EditorFor(model => model.Kauf.Value)
        @Html.ValidationMessageFor(model => model.Kauf.Value)
    </div>

    <p>
        <input type="submit" value="Save" />
    </p>    
}

How to pass Session data from controller to View (MVC)

If it is for saving with entity, there is no need to pass it to the view and send it back to server. You can use it directly in your HttpPost action method.

[HttpPost]
public ActionResult Create(Review review)
{  
    if (ModelState.IsValid) 
    {
        if(Session["LoggedUserID"]==null)
        {
           return Content("Session LoggedUserID is empty");
        }

        review.UserID = Convert.ToInt32(Session["LoggedUserID"]);   
        db.Reviews.Add(review);
        db.SaveChanges();

        return RedirectToAction("Index");
    }
    return View(review);        
}

I also added an If condition to check whether Session["LoggedInUserID"] is null before reading it to an int variable( UserID property). Ideally you may move this out of the action method to check whether user is logged in or not (May be an action filter like this)

ASP MVC 4 - binding and passing data from view to controller in repeating controls

Unfortunately could not post it earlier due to reputation regulations.

Finally resolved this issue due to good explanation at:
HTML.ActionLink method

When you try to pass an argument from Url.Action or Html.ActionLink - you have to specify explicitly the final "null" argument responsible for html arguments.

In my case the following code works correctly:

slightly changed controller action (now receives just name instead of commitee object itself)

public ActionResult CommiteePage(string commiteeName)
{ 
    return View("CommiteePage", SecureFolder.Commitees.First(o=>o.Name == commiteeName));
}

and changed syntax for html calling this action:

@foreach (var commitee in Model.Commitees)
{
    <a href="@Url.Action("CommiteePage", "SecureFolder", new { commiteeName=commitee.Name }, null)">
        <div class="commiteeButtonImageContainer">@commitee.Name</div>
        <img src="~/Images/CommiteeButtonImage.png"/>
    </a>
}

Now view correctly passes the name of selected commitee to controller so that I can redirect to corresponding commitee view.

Thank you all for helping to resolve this issue!

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