An exception of type 'System.ArgumentNullException' occurred in System.Web.Mvc.dll but was not handled in user code

[indian143]

Hi, I am using DropdownListFor in my MVC cshtml page, but I am getting the above error:

@Html.DropDownListFor(model => model.PKModeOfServiceLKPId, new SelectList(Model.ModeOfServiceLKPList, "PKModeOfServiceLKPId", "Description") , new { @class = "form-control input-sm", style = "width:300px;", @id = "idDDLForModeOfServiceCode"})

But I am getting the values in the Model as below;

    public List GetMCMSSFCrosswalkList()
    {
        using (BHPRVEntities pe = new BHPRVEntities())
        {

            var prov = pe.Usp\_Get\_MCMSSFCategoryCrosswalkList();
            return prov.Select(p => new MCMSSFCrosswalk()
            {
                Id = p.Id,
                Description = p.MCMSSFCrosswalkDescription,
                MCModeOfServiceCode=p.ModeOfServiceCode,
                FKServFuncCatMCModeOfServiceId = p.FKServFuncCatMCModeOfServiceId,
                ModeOfServiceCode=p.ModeOfServiceCode,
                ServiceFunctionCategoryCode=p.ServiceFunctionCategoryCode,
                ServiceFunctionCategoryDescription=p.ServiceFunctionCategoryDescription,
                CreatedDate = ((p.CreatedDate != null) && (!DBNull.Value.Equals(p.CreatedDate))) ? p.CreatedDate : null,
                CreatedBy = p.CreatedBy,
                ModifiedDate = ((p.ModifiedDate != null) && (!DBNull.Value.Equals(p.ModifiedDate))) ? p.ModifiedDate : null,
                ModifiedBy = p.ModifiedBy,                    
                IsValid = ((p.IsValid == null) || (DBNull.Value.Equals(p.IsValid))) ? true : p.IsValid,
                ModeOfServiceLKPList=GetListOfModeOfServices(),
                MCModeOfServiceLKPList = GetListOfMCModeOfServices(),
                ServiceFunctionCategoryLKPList = GetListOfServiceFunctionCategories()
            }).ToList();
        }
    }

My Model is as below:

public class MCMSSFCrosswalk
{
    private List listOfModeOfServiceLKP = new List();
    private List listOfMCModeOfServiceLKP = new List();
    private List listOfServiceFunctionCategoryLKP = new List();

    public int Id { get; set; }
    public string Description { get; set; }
    public string RevenueCode { get; set; }
    public string ProcedureCode { get; set; }

[Richard Deeming]

If the breakpoint isn't getting hit, then you haven't called the method. What does the code in your action method look like?

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