How To search using int loop

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I try to listing int value from 1 till 30 but until now its not work here is my controller

C#

var lis = new List<int>();
            lis.AddRange(Enumerable.Range(1, 30));
            ViewBag.listku = Enumerable.Range(1, 30).ToString();
            var lispeserta = from item in db.Klaim
                             select item;
            if(!string.IsNullOrEmpty(listku))
            {
                lispeserta = lispeserta.Where(x => x.NoPeserta == listku);
            }


            return View(lispeserta);

and here is my view

C#

@using (Html.BeginForm("Index", "Klaim", FormMethod.Get))
 { 
         <title>search</title> 
    @Html.DropDownList("listku","Semua") <input type="submit" value="Filter" />
}

the error message says "The ViewData item that has the key 'listku' is of type 'System.String' but must be of type 'IEnumerable<SelectListItem>'."
how should I do?

Posted 21-Aug-15 7:01am

Member 11854019

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PIEBALDconsult 21-Aug-15 13:12pm

Enumerable.Range(1, 30).ToString() -- returns a string (and just one string), just as you asked it to.
Use the debugger to see the value of ViewBag.listku , I bet it's not what you expect.

Philippe Mori 21-Aug-15 19:59pm

The error message is clear and say exactly what is the problem. Then looking at the code, it should be trivial to see that the variable is initialized with a string. You have to write appropriate code to have an IEnumerable of SelectListeItem.

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OriginalGriff · Answer 1 · 2015-08-21T08:17:00

Well, you could try comparing the same datatypes!
Assuming that ViewBag.listku and listku are the same thing, the value it contains will be the name of the class - which is going to be along the lines of "System.Linq.Enumerable+<rangeiterator>d__1" rather than the numbers you expect.
Probably you want to do something like this:

C#

var listku = Enumerable.Range(1, 30);
var lispeserta = from item in db.Klaim
                 select item;
    lispeserta = lispeserta.Where(x => listku.Contains(x.NoPeserta));
    return View(lispeserta);

[edit]Gah! Markdown again![/edit]