[Solved] Send CheckBox values from Partial View to Controller returns null in ASP.Net MVC

i want to post list back to the controller.

1: i have bind a table from list in partial view.

2: binded list is with a bool variable which is false when list rendered in partial view and after clicking on checkbox that value became change.

3: i am posting it again to the controller to save my record again in database.

But after posting back to the controller list became null.

@model JNCU_Apps.Models.SemesterCenterStudentDetailsModel
@{
    ViewBag.Title = "Center Wise Candidate List";
}

<div id="divGrid">
    <table>
        <thead>
            <tr>
                <th>Sl. No</th>
                <th>&nbsp;</th>
                <th>Enrollment No.</th>
                <th>Registration No.</th>
                <th>Roll No.</th>
                <th>Name</th>
                <th>Father Name</th>
                <th>Date of Birth</th>
                <th>college Name</th>
                <th>Course Name</th>
            </tr>
        </thead>
        <tbody>
            @for (int t = 0; t < Model.studentList.Count; t++)
            {  
                <tr>
                    <td>@(t = t + 1)</td>
                    <td>
                        @Html.HiddenFor(model => Model.studentList[t].candidateId)
                        @Html.CheckBoxFor(model => model.studentList[t].isAbsent)
                         @Html.HiddenFor(model => Model.studentList[t].isAbsent)

                    </td>
                    <td>@Html.DisplayFor(model => Model.studentList[t].enrollNumber) @Html.HiddenFor(model => Model.studentList[t].enrollNumber) </td>
                    <td>@Html.DisplayFor(model => Model.studentList[t].registrationNumber) @Html.HiddenFor(model => Model.studentList[t].registrationNumber) </td>
                    <td>@Html.DisplayFor(model => Model.studentList[t].rollNumber) @Html.HiddenFor(model => Model.studentList[t].rollNumber)</td>
                    <td>@Html.DisplayFor(model => Model.studentList[t].candidateName)</td>
                    <td>@Html.DisplayFor(model => Model.studentList[t].fatherName) </td>
                    <td>@Html.DisplayFor(model => Model.studentList[t].dob) </td>
                    <td>@Html.DisplayFor(model => Model.studentList[t].collegeName) </td>
                    <td>@Html.DisplayFor(model => Model.studentList[t].courseName)</td>
                </tr>
            }
        </tbody>

    </table>
</div>
this is partial view

  function bindStudentList() {
        var _exmType = $("#examtype").val();
        var _Course = $("#transid").val();
        var _Subjectid = $("#Subtransid").val();
        var _PaperID = $("#ddlPaperList").val();

        $.ajax({
            url: '@Url.Action("BindStudentListCenterWise", "Exam")',
            data: { exmType: _exmType, course: _Course, Subjectid: _Subjectid, PaperID: _PaperID },
            type: 'GET',
            dataType: 'HTML'
        }).success(function (returndata) {
            $('#Div_Data').html(returndata);


        }).error(function (xhr, status) {
            $('#Div_Data').html('');

        })
    }
    //this is function by which i am binding data

        public ActionResult BindStudentListCenterWise(string exmType, string course, string Subjectid, string PaperID)
        {
            string centerCode = Convert.ToString(Session["collegeCode"]);
            AdmissionSemester objSem = new AdmissionSemester();
            JNCU_Apps.Models.SemesterCenterStudentDetailsModel model = new JNCU_Apps.Models.SemesterCenterStudentDetailsModel();
            model.studentList = objSem.GetSemesterCenterWiseStudentList(exmType, centerCode, course, Subjectid, PaperID);
            if (model.studentList != null)
            {
                return PartialView("_StudentAttendance", model);
            }
            else
            {
                return Content("No Record Found");
            }
        }
        //this is action

        public ActionResult StudentAttendance(SemesterCenterStudentDetailsModel model)
        {
            AdmissionSemester objSem = new AdmissionSemester();

            ViewBag.Courses = objSem.getCoursesDropDownList();
            System.Text.StringBuilder sbQual = new StringBuilder();
            sbQual.Append("<StudentAttendance>");


            foreach (var s in model.studentList)
            {
                sbQual.Append("<Attendance>");
                sbQual.Append("<candidateId>" + s.candidateId + "</candidateId>");
                sbQual.Append("<rollNumber>" + s.rollNumber + "</rollNumber>");
                sbQual.Append("<isAbsent>" + s.isAbsent + "</isAbsent>");

                sbQual.Append("</Attendance>");
            }

            sbQual.Append("</StudentAttendance>");
            model.CandidateXML = sbQual.ToString();
            model.centerCode = Convert.ToString(Session["collegeCode"]);
            model.ipAddress = ipAddress.getIPAddress();
            var res = objSem.InsertAttendance(model.ExamTypeId, model.CourseId, model.SubjectID, model.PaperID, model.CandidateXML, model.ipAddress, model.centerCode);
            if (res.Flag == 1)
            {
                ViewBag.Msg = res.Msg;
                return View();

            }
            else
            {
                ViewBag.Msg = res.Msg;
                return View();
            }

        }
        //this is post action in which i want to get list again.