JQGrid is not loading data in MVC 5? - asp.net-mvc

Question

I am using jqgrid and table is working correctly. But no data is loading and it continuesly displaying "loading...". It worked correctly but i maybe due to some reason it is not working now.
public JsonResult GetDetails()
{
Database1Entities db = new Database1Entities();
var jsondata = new
{
total = 1,
page = 1,
records = db.Employees.ToList().Count.ToString(),
rows = db.Employees.Select(a => new {
a.Id,a.Name,a.Designation,a.Address,a.Salary
})
};
return Json(jsondata, JsonRequestBehavior.AllowGet);
}
JQGrid function is below:
$(document).ready(function () {
$("#Grid").jqGrid({
url: '/Home/GetDetails',
datatype: 'json',
myType: 'GET',
colNames: ['id','Name', 'Designation', 'Address', 'Salary'],
colModel: [
{ key: false, name: 'Id', index: 'Id', },
{ key: false, name: 'Name', index: 'Name', editable: true },
{ key: false, name: 'Designation', index: 'Designation', editable: true },
{ key: false, name: 'Address', index: 'Address', editable: true },
{ key: false, name: 'Salary', index: 'Salary', editable: true }
],
jsonReader: {
root: 'rows',
page: 'page',
total: 'total',
records: 'records',
id: '0',
repeatitems: false
},
pager: $('#pager'),
rowNum: 10,
rowList: [10, 20, 30],
width: 600,
viewrecords: true,
multiselect: true,
sortname: 'Id',
sortorder: "desc",
caption: 'Employee Records',
loadonce: true,
}).navGrid('#pager', { edit: true, add: true, del: true },
{
zIndex: 100,
url: '/Home/Edit',
closeOnEscape: true,
closeAfterEdit: true,
recreateForm: true,
afterComplete: function (response) {
if (response.responseText)
{
alert(response.responseText);
}
}
},
{
zIndex: 10,
url: '/Home/Add',
closeOnEscape: true,
closeAfterEdit: true,
recreateForm: true,
afterComplete: function (response) {
if (response.responseText) {
alert(response.responseText);
}
}
},
{
zIndex: 100,
url: '/Home/Delete',
closeOnEscape: true,
closeAfterEdit: true,
recreateForm: true,
afterComplete: function (response) {
if (response.responseText) {
alert(response.responseText);
}
}
}
);
});
If i add something, it works and data is inserted into database but the main problem is not data is shown in JQGrid. What is the problem?