CODEWITHSUNDEEP
asp.net-mvc
user1161137
user1161137

Reputation: 1117

DropDownListFor not selecting default

I'm having problems trying to get a preselected value to work. I've tried to include Selected in the SelectListItem but it doesn't pre-select. Any clues as to why it's not matching up? Thanks for any help.

RetailerId is int. (it's not defined as enumerable)

Retailer is an enum, for example: 

public enum Retailer
{
  Sears = 10, 
  Macys = 20
}

Here is the View code :

 @Html.DropDownListFor(x => x.RetailerId,
                    Enum.GetValues(typeof(Retailer)).Cast<Retailer>()
                    .OrderBy(o => o.GetDescription())
                    .Select(o => new SelectListItem() { Text = o.GetDescription(), Value = o.ToString(), Selected = (o.ToInt() == Model.RetailerId) }), 
                    new { @data_placeholder = "Select Retailer", @class = "form-control" })

Upvotes: 1

Views: 78

Answers (1)

user3559349
user3559349

Reputation:

Your generating a collection of SelectListItem where the Value is either "Sears" or "Macys" which cannot be bound to property RetailerId which is an int.

Note that the Selected property of SelectListItem is ignored when binding to a model property. Internally the method sets the Selected property based on the value of the property your binding to, and since its an int, it does not match any of your options values and the first option is selected because something has to be.

You can make this work by modifying the .Select clause to

.Select(o => new SelectListItem() { Text = o.GetDescription(), Value = ((int)o).ToString() }),

Alternatively, change the model property to

public Retailer RetailerId { get; set; }

an the .Select clause to

.Select(o => new SelectListItem() { Text = o.GetDescription(), Value = o.ToString() }),

Upvotes: 3

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