How Can I send selected text to controller from DropdownList

Question

I want to send the selected text field in dropdown to the controller. When I use the code as follows, I can send the id number to the controllers, but the value I selected in the list pass null.

In addition , if there is a registered value in the model, I want this field to be selected in the dropdownlist when the page is opened.

Controller

    public ActionResult Degerlendir(int id ,string CV_STATU)
        {
        using (MULAKATDBEntities1 ent = new MULAKATDBEntities1())
                    {
                        CvViewModel cv = new CvViewModel();
                        var entData = ent.CV.FirstOrDefault(a => a.ID_CV == id);
                        entData.CV_STATU = CV_STATU;
                        ent.SaveChanges();
                     } 
        }

In View

@using (Html.BeginForm("Degerlendir", "Home", FormMethod.Post))
{
<input type="hidden" name="id" value="@Model.Cv.ID_CV" />
 @Html.DropDownListFor(model => model.Cv.CV_STATU,
            new List<SelectListItem> {
            new SelectListItem() { Text = "Secilmedi" },
            new SelectListItem() { Text = "Kabul edildi" },
            new SelectListItem() { Text = "Reddedildi" } },
            new {@id="cv_statu", @class = "form-control" })
<input type="submit" id="btnSubmit" value="KAYDET" class="btn btn-add" />
 }

Answer 1

I am assuming that what you shared on your code for your ActionResult is already the HttpPost Action verb. There should be a proper HttpGet as well.

To solve your issue, make sure the first argument that you set on your DropDownListFor should match on the parameter of your Degerlendir

@Html.DropDownListFor(model => model.CV_STATU,
        new List<SelectListItem> {
        new SelectListItem() { Text = "Secilmedi", Value = "Secilmedi" },
        new SelectListItem() { Text = "Kabul edildi", Value = "Secilmedi" },
        new SelectListItem() { Text = "Reddedildi", Value = "Reddedildi", Selected = true} }, "Please select an option",
        new {@id="cv_statu", @class = "form-control" })

As you notice, I changed your:

@Html.DropDownListFor(model => model.Cv.CV_STATU

To:

@Html.DropDownListFor(model => model.CV_STATU

Because what you set here will set the name attribute on your HTML. This will be binded on your parameter on your ActionResult of Degerlendir particularly your parameter:

string CV_STATU

Lastly, I added Value on your SelectListItem, because that will be passed on your ActionResult whatever you select on your DropDownList. To set the default selected value, just add Selected = true.

Answer 2

Set @name="cv_statu" within the HTML helper htmlAttributes for binding to parameters on POST like this.

Also change the controller method parameter to lowercase cv_statu. Only parameter names passed through URL routes are not case sensitive.