mvc4 asp.net dropDownList Insert NULL

Question

5.00/5 (1 vote)

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I search a lot here and find something like this to make dropdown list

this is my controller:
This pass my data for dropDownList...

C#

public ActionResult Create()
  {
      var dba = new WHFMDBContext();
      var query = dba.Categories.Select(c => new { c.Id, c.Name });
      ViewBag.Id = new SelectList(query.AsEnumerable(), "Id", "Name", 3);
      return View();
  }

C#

[HttpPost]
        [InitializeSimpleMembership]
        public ActionResult Create(Profits profits)
        {
            var user = db.UserProfiles.FirstOrDefault(x => x.UserId == WebSecurity.CurrentUserId);
            var profit = new Profits
            {
               Value= profits.Value,
               Description = profits.Description,
               DateInput =profits.DateInput,
               CategoryName =profits.CategoryName,// ???
                User = user,

            };
            db.Profits.Add(profit);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

My View :

HTML

@using (Html.BeginForm()) {
    @Html.ValidationSummary(true)

    <fieldset>
        <legend>Profits</legend>
            
        <div class="editor-field">
           @Html.DropDownList("Id", (SelectList) ViewBag.Id, "--Select One--") 
            </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.CategoryName.Id)
            @Html.ValidationMessageFor(model => model.CategoryName.Id)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.Value)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Value)
            @Html.ValidationMessageFor(model => model.Value)
        </div>

This insert data to database but CategoryName_Id is NULL what am I missing ?
and CategoryName =profits.CategoryName this is a foreign key to Categories in Profits `public Categories CategoryName { get; set; }`

Posted 5-Mar-13 7:47am

krasi89

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Comments

Jameel VM 6-Mar-13 0:51am

Please post the Profit class code also

Ahamed Azeem 6-Mar-13 3:11am

check the profits table included to the category table or if yes update your model file and rebuild it

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Ismael Almonte · Answer 1 · 2013-03-08T16:45:00

Looks to me like the problem is with the editor not the drop down. the drop down is setting Profits.Id, the editor should be setting the Profits.CategoryName.Id to whatever the user entered on the text, maybe it fails because you are not sending a model to the view.

Try sending an empty Profits to the model:

public ActionResult Create()
  {
      var dba = new WHFMDBContext();
      var query = dba.Categories.Select(c => new { c.Id, c.Name });
      ViewBag.Id = new SelectList(query.AsEnumerable(), "Id", "Name", 3);
      Profits model = new Profits();
      model.CategoryName = new CategoryName();
      return View(model);
  }

Also should'nt you have the dropdown for the category name id?

C#

@Html.DropDownListFor(model => model.CategoryName.Id,(SelectList) ViewBag.Id, "--Select One--" )