MVC SelectList error

Question

I have a SelectList that I have passed into a form in my view. When I try to post it I get this error:

There is no ViewData item of type 'IEnumerable<SelectListItem>' that has the key 'roleName'.

Code in Controller:

ViewBag.roleName = new SelectList(Roles.GetAllRoles().Where(rn =>

rn != "Administrator" && rn != "Special"));

Code in View:

@Html.DropDownList("roleName", ViewBag.roleName as SelectList, "Select")

Jignesh Trivedi · Answer

Hi Text And Value fileds are you actual Proper name. you can also try.. Example: If you Role class public class Role { public int RoleId{get;set;} public string RoleName{get;set;} } then statement becomes.... var k= Roles.GetAllRoles().Where(rn => rn != Administrator && rn != Special); IList list = k.Select(r => new SelectListItem() { Text = r.RoleName Value = r.RoleId }).ToList(); return new SelectList(list Value Text); Hope this help.

Rich · Answer

What shoud the value and text fields be. I am having trouble figuring that out being that I used the Roles.GetAllRoles() method. I tried RoleName but that didn't work.

Jignesh Trivedi · Answer

hi Yor code look correct but I think you miss to pass value filed and text field. example. ViewBag.roleName = new SelectList(Roles.GetAllRoles().Where(rn => rn != Administrator && rn != Special) ValueFiled TextFiled ); Here Valuefield and Textfield name of the property of roles class. hope this help.