public JsonResult AjaxHandler(jQueryDataTableParamModel param)
{
int totalCustomersCount, totalFilteredCustomersCount;
List<Customer> results = db.SearchCustomers(out totalCustomersCount, out totalFilteredCustomersCount, param);
// jQuery DataTables expected values http://datatables.net/usage/server-side
return Json(new
{
iTotalRecords = totalCustomersCount,
iTotalDisplayRecords = totalFilteredCustomersCount,
sEcho = param.sEcho,
aaData = results.Select(t => t.GetDataTableRow()).ToArray()
}, JsonRequestBehavior.AllowGet);
}
public List<Customer> SearchCustomers(out int totalCustomersCount, out int totalFilteredCustomersCount, jQueryDataTableParamModel param)
{
// Note: This data access design is not efficient, consider refactoring to a stored procedure before scaling.
IQueryable<Customer> customers = base.Customers.Where(t => (t.CompanyName.Equals(param.CompanyName) || param.CompanyName.Equals(null))
&& (t.ModifiedDate >= param.LastModifiedDateStart || param.LastModifiedDateStart.Equals(null))
&& (t.ModifiedDate <= param.LastModifiedDateEnd || param.LastModifiedDateEnd.Equals(null))
);
totalCustomersCount = customers.Count();
customers = customers.Where(t =>
// Master keyword search
t.CustomerId.ToString().Equals(param.sSearch)
|| t.CompanyName.Contains(param.sSearch)
|| t.EmailAddress.Contains(param.sSearch)
|| t.FirstName.Contains(param.sSearch)
|| t.MiddleName.Contains(param.sSearch)
|| t.LastName.Contains(param.sSearch)
|| t.Suffix.Contains(param.sSearch)
|| t.ModifiedDate.ToString().Contains(param.sSearch)
|| t.Phone.Contains(param.sSearch)
|| t.SalesPerson.Contains(param.sSearch)
|| t.Title.Contains(param.sSearch)
|| param.sSearch == null
);
if (param.aaSortingCols.Count() > 0)
{
var orderedQuery = (param.aaSortingCols[0][1] > 0) ?
customers.OrderBy(HelperMethods.CustomerOrderByHelper(param.aaSortingCols[0])) :
customers.OrderByDescending(HelperMethods.CustomerOrderByHelper(param.aaSortingCols[0]));
for (int i = 1; i < param.aaSortingCols.Count(); i++)
{
orderedQuery = (param.aaSortingCols[i][1] > 0) ?
orderedQuery.ThenBy(HelperMethods.CustomerOrderByHelper(param.aaSortingCols[0])) :
orderedQuery.ThenByDescending(HelperMethods.CustomerOrderByHelper(param.aaSortingCols[0]));
}
customers = orderedQuery.AsQueryable();
totalFilteredCustomersCount = customers.Count();
}
else
{
totalFilteredCustomersCount = totalCustomersCount;
}
return customers.Skip(param.iDisplayStart).Take(param.iDisplayLength).ToList();
}
