Dropdownlist value always returns zero in asp.net mvc

Question

This is the sample of the model class

[Required(ErrorMessage = "Department is required")]
[Display(Name = "Department")]
public int SelectedValue { get; set; }


[Required(ErrorMessage = "Department is required")]
[Display(Name = "Department")]
public List<Department> RoleList { get; set; }

This is the view

<div class="col-md-10">
    @Html.DropDownListFor(m => m.RoleList, new SelectList(Model.RoleList,"ID", "RoleName","1"), "Please Choose a Department", new { htmlAttributes = new { @class = "form-control"} })
    @Html.ValidationMessageFor(model => model.SelectedValue, "",new { @class = "text-danger"})
</div>

The list is populated perfectly from the database. Now when i select the item on the list, the select value has to be sent to the controller

public async Task<ActionResult> Register(RegisterViewModel model)
{
    int Selectedvalue = model.SelectedValue;
    if (ModelState.IsValid && (model.SelectedValue).ToString() != "0")
    {

Here i have made a selection

Error

We can't see your error.

Matt Spinks
– Matt Spinks

2017-12-06 16:48:38 +00:00
Commented Dec 6, 2017 at 16:48 — Matt Spinks
– Matt Spinks, Commented Dec 6, 2017 at 16:48
@MattSpinks , it has been solved

Alsong Dun Dunstan Philander
– Alsong Dun Dunstan Philander

2017-12-06 17:28:50 +00:00
Commented Dec 6, 2017 at 17:28 — Alsong Dun Dunstan Philander
– Alsong Dun Dunstan Philander, Commented Dec 6, 2017 at 17:28

Emre Kabaoglu · Accepted Answer · 2017-12-06 17:01:32Z

3

You should change it

@Html.DropDownListFor(m => m.RoleList, new SelectList(Model.RoleList,"ID", "RoleName","1"), "Please Choose a Department", new { htmlAttributes = new { @class = "form-control"} })

To

@Html.DropDownListFor(m => m.SelectedValue, new SelectList(Model.RoleList,"ID", "RoleName","1"), "Please Choose a Department", new { htmlAttributes = new { @class = "form-control"} })

The first parameter of the DropDownListFor should be selected value in model. In your case, this property is Model.SelectedValue not Model.RoleList.

edited Dec 6, 2017 at 17:01

answered Dec 6, 2017 at 16:56

Emre Kabaoglu

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1 Comment

Fran Over a year ago

In addition you can remove the Required attribute from RoleList becuase it is not POST'ed to the server and the Display attribute because are displaying that property, you are displaying the property of SelectedValue

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