Html.Enumdropdownlistfor: Showing a Default Text

Html.EnumDropdownListFor: Showing a default text

Try to change the Index of LicenseTypes start from 1 not 0 like below:

public enum LicenseTypes
{
    Trial = 1,
    Paid = 2
}

Then you can use Range attribute to validate the selected license type like below:

public class YourViewModel
{
     //Other properties
     [Range(1,int.MaxValue,ErrorMessage = "Select a correct license")]
     public LicenseTypes LicenseTypes { get; set; }
}

Finally, in your view:

   @Html.EnumDropDownListFor(m => m.LicenseTypes,"Select a license",new { @class = "form-control"})
   @Html.ValidationMessageFor(m => m.LicenseTypes)

ASP MVC 5 @Html.EnumDropDownListFor Defaults to first Item

The solution for this is to make the model enum property a nullable type:

public class MyViewModel
{
   public string searchTerm { get; set; }
   public EmploymentType? EmploymentType { get; set; }
}

This way the property allows for null entries and by default it will be null.

How to add a default item to an EnumDropDownList in MVC?

Your model property is probably not Nullable. That means it will always be initialized to the first value of the enum.

If your model property looks like this:

public MyEnum { get; set; }

Change it to this:

[Required] //Require one of the values is selected i.e. value is not null
public Nullable<MyEnum> { get; set; }

This is a very general problem related to requiring value types have a value set. An easy way is to make it Nullable and check it is not null. As otherwise the value type will just have its default value.

Setting default value to Html.DropDownListFor

If you want to pass default value for the dropdown list than you can do is pass default viewmodel/model with default value

Example :

public ActionResult New()
{
    MyViewModel myViewModel = new MyViewModel ();
    myViewModel.OfficeAddressCountry = default value; 
    //Pass it to the view using the `ActionResult`
    return ActionResult( myViewModel);
}

or you can try this

 var list = new SelectList(Db.Countries, "CountryCode", "CountryName")
 list.Add(new SelectListItem(){Value = 1,Text = "Deafult Item",Selected = true };)
 ViewBag.ListOfCountries = list;

EnumDropDownListFor with Enum string value

With Andy's anwser, i wrote a helper but not sure it's the best way to do that. If any body have a better solution

public static MvcHtmlString EnumDropDownListWithStringFor<TModel, TEnum>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TEnum>> expression, string optionLabel, object htmlAttributes)
{
    var selectListItem = Enum.GetNames(Nullable.GetUnderlyingType(typeof(TEnum))).Select(p => new SelectListItem() { Value = p, Text = p }).ToList();
    return SelectExtensions.DropDownListFor(htmlHelper, expression, selectListItem, optionLabel, htmlAttributes);
}

How to set the selected value in EnumDropDownListFor?

As far as I know just make sure the value you want to be selected is set in your Model before you call

//Controller:
...
myModel.TestEnum = TestEnum.name2;
...

//On your view
...
@Html.EnumDropDownListFor(model => model.TestEnum);
...

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