CODEWITHSUNDEEP
c#.netasp.net-mvc
user2206329
user2206329

Reputation: 2842

how to add a selectlistitem to a selectlist

I have the following select list

 public SelectList StaffList { get; set; }

I am assigning it the following,

inspectorCorrespondences.StaffList = new SelectList(userDetails, "Id", "FullName");

but I want to add in another SelectList item

 var systemGeneratedUser = new SelectListItem() { Value = "-1", Text = "System Generated" };

how do I do that?

Upvotes: 2

Views: 8071

Answers (2)

David
David

Reputation: 218877

According to the documentation, it looks like you need to initialize the SelectList with the values instead of adding them. Passing an enumerable of SelectListItem to the constructor appears to be the expected way.

It looks like you're already doing that in the sense that userDetails is already an enumeration? If so, what type of enumeration is it? You may need to add a line or two of code to transform it to an enumeration of SelectListItem objects, add yours to that, and then use that to initialize the SelectList. Maybe something like this:

var listItems = userDetails.Select(u => new SelectListItem { Value = u.Id, Text = u.FullName }).ToList();
listItems.Add(new SelectListItem() { Value = "-1", Text = "System Generated" });
// or perhaps .Insert() at position 0 instead?
inspectorCorrespondences.StaffList = new SelectList(listItems, "Value", "Text");

Upvotes: 2

NullRef
NullRef

Reputation: 106

This isn't necessarily the most elegant solution, but you'll need to cast the SelectList's items to a list of SelectListItems if you want to add another SelectListItem.

        var myItems = new List<SelectListItem>();

        myItems.Add(new SelectListItem() { Text = "AA", Value = "11" } );

        var mySelectList = new SelectList(myItems);

        ((List<SelectListItem>)mySelectList.Items).Add(new SelectListItem() { Text = "BB", Value = "22" });

Upvotes: 3

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