A data source must be bound before this operation can be performed.

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MVC

hi i am getting this error A data source must be bound before this operation can be performed,i am getting error on view i.e grid part

this is model code

using FT.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

using System.Web.Mvc;

namespace FT.Models
{
    public class ReportGenerationModel
    {

        List<VmsTypeDetailModel> getreportcategorylist;
        List<AppointmentModel> serachedAppointmentModelList;
        //List<DptWise> DptWiseReport { get; set; }
        public ReportGenerationModel()
        {
            getreportcategorylist = new List<VmsTypeDetailModel>();
            serachedAppointmentModelList = new List<AppointmentModel>();


        }

        //Common Fields
        public int Id { get; set; }
        public string EmployeeId { get; set; }
        public string UserName { get; set; }
        public string TypeMasterName { get; set; }
        public Nullable<System.DateTime> RecurringToDateTime { get; set; }
        public Nullable<System.DateTime> RecurringFromDateTime { get; set; }



        //DPTWise
        public string VisitingDepartmentName { get; set; }
        public string ReasonForVisit { get; set; }
        public string ContactPersonName { get; set; }
        public Nullable<System.TimeSpan> VisitorCheckInTime { get; set; }
        public Nullable<System.TimeSpan> VisitorCheckOutTime { get; set; }
        public string CompanyName { get; set; }


        // public List<VmsTypeDetailModel> ReportcategoryList { get; set; }
        public List<VmsTypeDetailModel> ReportcategoryList
        {
            get
            {
                return getreportcategorylist;
            }
            set
            {
                getreportcategorylist = value;
            }
        }

        public List<AppointmentModel> SerachedAppointmentModelList
        {
            get
            {
                return serachedAppointmentModelList;
            }
            set
            {
                serachedAppointmentModelList = value;
            }
        }

        public AppointmentModel Appointment { get; set; }

        public VisitorModel Visitor { get; set; }
        public List<DptWise> DptWiseReport { get; set; }
    }

    public class DptWise
    {

        public string VisitingDepartmentName { get; set; }
        public string ReasonForVisit { get; set; }
        public string ContactPersonName { get; set; }
        public Nullable<System.TimeSpan> VisitorCheckInTime { get; set; }
        public Nullable<System.TimeSpan> VisitorCheckOutTime { get; set; }
        public string CompanyName { get; set; }

    }
}
</pre>

this is controller code

   public ActionResult VMSReports()//sowji
        {

            ReportGenerationModel reportGenerationModel = new ReportGenerationModel();
            //reportGenerationModel = this._iEmailConfigurationService.GetReportList();
            reportGenerationModel = this._iEmailConfigurationService.GetReportList();

            return View(reportGenerationModel);
        }
        [HttpPost]
        [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult VMSReports(ReportGenerationModel GetreportGenerationModel)
        {
            GetreportGenerationModel.ReportcategoryList = this._iEmailConfigurationService.GetReportList().ReportcategoryList;
            if (GetreportGenerationModel.TypeMasterName == "101")
            {
                List<ReportGenerationModel> reportGenerationModel = this._iEmailConfigurationService.GetReportDetails(GetreportGenerationModel);
                List<DptWise> lstDptwise = new List<DptWise>();
               foreach (ReportGenerationModel item in reportGenerationModel)
                 // foreach(DptWise item in lstDptwise )
                {
                    lstDptwise.Add(new DptWise { CompanyName = item.CompanyName, ContactPersonName = item.ContactPersonName, ReasonForVisit = item.ReasonForVisit, VisitingDepartmentName = item.VisitingDepartmentName, VisitorCheckInTime = item.VisitorCheckInTime, VisitorCheckOutTime = item.VisitorCheckOutTime });
                }
                GetreportGenerationModel.DptWiseReport = lstDptwise;
            }
            return View(GetreportGenerationModel);

        }

view code

@using GridMvc.Html
@{
    ViewBag.Title = "VMSReports";
    Layout = "~/Views/Shared/_LayoutAdmin.cshtml";

   // var grid = new WebGrid(Model.SerachedAppointmentModelList, defaultSort: "Id", rowsPerPage: 9);
    var grid = new WebGrid(Model.DptWiseReport, defaultSort: "VisitingDepartmentName", rowsPerPage: 9);

   // var grid = new WebGrid(Model, rowsPerPage: 9);
}
</pre>
 <div id="gridContent" style="padding: 20px;">
                @grid.GetHtml(
            tableStyle: "gridTable",
            headerStyle: "gridHead",
            footerStyle: "gridFooter",
            rowStyle: "gridRow",
            alternatingRowStyle: "gridAltRow",
            columns:
            grid.Columns(
             grid.Column("DepartmentName", @Resources.Appointment.VisitingDepartmentName, format: @<text>  <span class="display-mode">@item.VisitingDepartmentName</span></text>, style: "col1Width"),
             grid.Column("To", @Resources.Appointment.RecurringToDateTime, format: @<text>  <span class="display-mode">@Model.RecurringToDateTime</span> </text>, style: "col2Width"),
             grid.Column("From", @Resources.Appointment.RecurringFromDateTime, format: @<text>  <span class="display-mode">@Model.RecurringFromDateTime</span></text>, style: "col1Width"),
             grid.Column("Company Address", @Resources.Appointment.CompanyName, format: @<text>  <span class="display-mode">@item.CompanyName</span> </text>, style: "col2Width"),
             grid.Column("ContactPersonName", @Resources.Appointment.ContactPersonName, format: @<text> <span class="display-mode">@item.ContactPersonName</span></text>, style: "col3Width"),
             grid.Column("ReasonForVisit", @Resources.Appointment.ReasonForVisit, format: @<text> <span class="display-mode">@item.ReasonForVisit</span></text>, style: "col3Width"),
              grid.Column("Intime", @Resources.Appointment.VisitorCheckInTime, format: @<text> <span class="display-mode">@item.VisitorCheckInTime</span></text>, style: "col3Width")
             //grid.Column("Export to excel", format: @<text>&lt;button type="submit" class="btn btn-primary pull-right btn-sm RbtnMargin" onclick="location.href='@Url.Action("ViewAppointment", "Appointment", new { aId = Model.AppointmentID })'">@Resources.Appointment.View&lt;/button></text>)
           ))

            </div>