CODEWITHSUNDEEP
asp.net-mvchtml.dropdownlistforselected
fyasir
fyasir

Reputation: 2970

Html.Dropdownlist selected value not working

In my project, Html.DropdownList could not display its selected value.It displays the initial value of the list.My controller and view codes are given below:

Controller:

public ActionResult Edit(int id = 0)
    {
        PERMISSION permission = permissionManager.Find(id);
        ViewBag.MODULE_ID = new SelectList(moduleManager.GetAll(), "ID", "TITLE",permission.MODULE_ID);
        return View(permission);
    }

View :

@Html.DropDownList("MODULE_ID", (IEnumerable<SelectListItem>)@ViewBag.MODULE_ID, new { @class = "form-control" })

But if I write :

@Html.DropDownList("MODULE_ID", String.Empty)

It works fine.but I have to add the class="form-control".What should be solution?
UPDATE:
I have changed the ViewBag name from ViewBag.MODULE_ID to ViewBag.ModuleList. It may conflicts with the name of the dropdownlist. and now It works fine.

Upvotes: 2

Views: 5338

Answers (3)

Flowra
Flowra

Reputation: 1408

what works for me according to previous solution: in controller:

ViewBag.VCenter = new SelectList(db.VirtualMachinesData.Where(x => x.IsVCenter == true).ToList(), "Id", "IPAddress","80"); ;

in View:

@Html.DropDownList("v", (IEnumerable<SelectListItem>)@ViewBag.VCenter, new { @class = "form-control" })

Important note: the name of dropdownlist -"v"- must be different from the name of viewbag -"VCenter"-, if same names it didn't work.

Upvotes: 0

fyasir
fyasir

Reputation: 2970

I have changed the ViewBag name from ViewBag.MODULE_ID to ViewBag.ModuleList. It may conflicts with the name of the dropdownlist. and now It works fine.

Upvotes: 4

arserbin3
arserbin3

Reputation: 6148

You are adding the form-control class in the wrong parameter. currently it is being added as the option label.

Use this: 

@Html.DropDownList("MODULE_ID", (IEnumerable<SelectListItem>)@ViewBag.MODULE_ID, "-- Select --",  new { @class = "form-control" })

On a side note, you should consider using a ViewModel class and doing away with both the magic string "MODULE_ID" and the ViewBag magic property. A ViewModel class allows you to strongly name things without casting, like this:

@Html.DropDownListFor(model => model.MODULE_ID, Model.Modules, "-- Select --", new { @class = "form-control" })

It's a subtle looking change but everything is compile time checked.

Upvotes: 1

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