The parameters dictionary contains a null entry for parameter 'id' of non-nullable type 'System.Int32' for method

Question

I am getting this error when I try to post Via action link. I have a default map route.

The parameters dictionary contains a null entry for parameter 'id' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult Rent_Approval(Kendo.Mvc.UI.DataSourceRequest, Int32)' in .....

Here is my action link

@Html.ActionLink("Send For Approval","Rent_Approval", "RentRequisition", new { id = "#=RentID#" }, new { @onclick = "OnIndexCall(this)" })

Here is my action method

    public ActionResult Rent_Approval([DataSourceRequest] DataSourceRequest request, int id)
    {
        var record = db.RentRequisitions.FirstOrDefault(p => p.RentID == id);
        try
        {
            if (record != null)
            {
                record.Status = Enum.GetName(typeof(OperationStatuses), 4);
                db.Requisitions.Attach(record);
                db.Entry(record).State = System.Data.Entity.EntityState.Modified;
                db.SaveChanges();
            }

            var model = new List<RentRequisition> { record };

            return RedirectToAction("Index");
        }

Answer 1

Your syntax for the link doesn't look correct to me. Reference your view model to get the param values in the link's params

try...

@Html.ActionLink("Send For Approval","Rent_Approval", "RentRequisition", new { id = Model.RentID}, new { @onclick = "OnIndexCall(this)" })

Hope that helps