Dropdownlist is not working on my asp.net mvc?

Hi Team

I am trying to use this control on asp.net mvc, its throwing this error " System.InvalidOperationException: 'There is no ViewData item of type 'IEnumerable' that has the key 'SelectedCountryId'.'

@Html.DropDownListFor(m=>m.SelectedCountryId, this.ViewBag.CountryList as SelectList, new {@class = "form-control"})

/** Controler**/
// Selection for countries in the world.
public ActionResult DropDownSelect()
{
EditTrainingRegFormViewModel model = new EditTrainingRegFormViewModel();
model.SelectedCountryId = 0;
this.ViewBag.CountryList = this.GetCountryList();
return this. View(model);
}
private List LoadData()
{
List lst = new List();
try
{
string line = string.Empty;
string srcFilePath = "Content/files/country_list.txt";
var rootPath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().CodeBase);
var fullPath = Path.Combine(rootPath, srcFilePath);
string filePath = new Uri(fullPath).LocalPath;
StreamReader src = new StreamReader(new FileStream(filePath, FileMode.Open, FileAccess.Read));
// while to read the file
while((line = src.ReadLine()) !=null) {
EditTrainingRegFormViewModel infoLst = new EditTrainingRegFormViewModel();
string[] info = line.Split(',');
//Setting
infoLst.Country_Id = Convert.ToInt32(info[0].ToString());
infoLst.Country_Name = info[1].ToString();
lst.Add(infoLst);
}
src.Dispose();
src.Close();
}catch(Exception ex)
{
Console.Write(ex);
}
return lst;
}
// List for countries.
private IEnumerable GetCountryList()
{
SelectList listcn = null;
try
{
var list = this.LoadData().Select(p => new SelectListItem
{
Value = p.Country_Id.ToString(),
Text = p.Country_Name
});
listcn = new SelectList(list, "Value", "Text");
}catch(Exception ex)
{
// throw ex;
}
return listcn;
}
// Model.cs
public class EditTrainingRegFormViewModel
{
public string Title { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Position { get; set; }
public string Company { get; set; }
public string Address { get; set; }
[Display(Name = "Choose country")]
public int ? SelectedCountryId { get; set; }
public string Code { get; set; }
public string City { get; set; }
public string State { get; set; }
public string Cell_Number { get; set; }
public List<string> Dietary_requirement { get; set; }
public string Email { get; set; }
public int Country_Id { get; set; }
public string Country_Name { get; set; }
}

1 Reply

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Jignesh Kumar6y ago
Hi Gcobani,

Please change in cshtml file,
@Html.DropDownListFor(m=>m.SelectedCountryId, new SelectList(ViewBag.CountryList, "Country_Id", "Country_Name"), "Please select",, new {@class = "form-control"})