C# DropDown List default value

Question

I am using this code to input values from a database table to a dropdown list:

<div class="editor-field">
        @Html.DropDownListFor(model => model.TourImageID, new SelectList(Model.Images, "ImageID", "Filename", Model.TourImageID))
</div>

What i am trying to do is add an item to the top of the list, that is not present in the database table.

Something like DROPDOWN LIST VALUES = (DEFAULT-ITEM) + (DATABASE-TABLE-ITEMS)

is that possible? if so, how?

Answer 1

If your Model.Images is of type SelectList , you can do something like this in your controller:

var query = UnitOfWork.GlobalImageLibraryRepository.Images.Select(x => new { x.ImageID, x.Filename });

viewModel.Images = new SelectList(query.AsEnumerable(), "ImageID", "Filename");
viewModel.Images.Insert(0, new SelectListItem { Value = "0", Text = "--Select--" });

I've assumed that you have a method in your GlobalImageLibraryRepository class that returns IQueryable<Images> like this:

public IQueryable<Images> Images { get { return dbcontext.Images; } }

So after all that, your view will look like this:

<div class="editor-field">
        @Html.DropDownListFor(model => model.TourImageID, (SelectList)Model.Images, Model.TourImageID))
</div>