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MVC SelectList error

MVC SelectList error

Rich

14yAsked May 14, 2012, 6:36 PM3.5k.NET

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' 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")

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Jignesh Trivedi14y ago
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.
Rich14y ago
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 Trivedi14y ago
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.