Using DataTables ServerSide with .Net MVC

Using DataTables ServerSide with .Net MVC

burgoyneburgoyne Posts: 6Questions: 2Answers: 0

So I am trying to get my table loaded server side. I will show my code, with the errors I am receiving.
Controller Method:

[HttpPost("Admin/Postings")]
        public JsonResult GetAllUsers()
        {
            JsonResult result = new JsonResult(new { });

                // Initialization.   
                string search = Request.Form.GetValues("search[value]")[0];
                string draw = Request.Form.GetValues("draw")[0];
                string order = Request.Form.GetValues("order[0][column]")[0];
                string orderDir = Request.Form.GetValues("order[0][dir]")[0];
                int startRec = Convert.ToInt32(Request.Form.GetValues("start")[0]);
                int pageSize = Convert.ToInt32(Request.Form.GetValues("length")[0]);
                // Loading.   
                List<PostingViewModel> data = _adminServices.GetAllPostings();
                // Total record count.   
                int totalRecords = data.Count;
                data = data.Skip(startRec).Take(pageSize).ToList();
                var modifiedData = data.Select(d =>
                    new
                    {
                        d.BrandLogo,
                        d.Title,
                        d.BrandName,
                        d.LocationName,
                        d.NumberOfApplications.New
                    }
                );

                result = Json(new
                {
                    draw = Convert.ToInt32(draw),
                    recordsTotal = totalRecords,
                    //recordsFiltered = recFilter,
                    data = modifiedData
                }, JsonRequestBehavior.AllowGet);

            // Return info.   
            return result;
        }

GetValues() error: IFormCollection does not contain a definition for GetValues and no accessible extension method GetValues accepting a first argument of type IFormCollection could be found

_adminServices error: Cannot implicitly convert type 'System.Threading.Tasks.Task<System.Collections.Generic.IEnumerable<DataModel.Models.Posting>>' to 'System.Collections.Generic.List<ViewModels.ViewModels.PostingViewModel>'

Here is my GetAllPostings() method (no errors):

public async Task<IEnumerable<Posting>> GetAllPostings()
        {
            try
            {
                IQueryable<Posting> query = _unitOfWork
                    .PostingRepository
                    .All("Location", "Location.Company", "Category", "Applications", "LanguageTag")
                    .OrderBy(e => e.Title);

                IEnumerable<Posting> postings = await _unitOfWork
                    .PostingRepository
                    .Materialize(query);

                return postings;
            }
            catch (Exception ex)
            {
                throw new ServiceException(ServiceExceptionType.UnexpectedError, ex.Message, ex);
            }
        }

I can post up my models if required. My table works fine on client side, but I am needing to switch to server side now. Any help is appreciated!

Answers

  • freecexfreecex Posts: 25Questions: 4Answers: 0

    Convert modified data in

    var data = modifieddata.Skip(skip).Take(pageSize).ToList();

    and pass it to view. (skip and page size come from view)

  • burgoyneburgoyne Posts: 6Questions: 2Answers: 0

    @freecex Sorry, I'm not sure what you mean by "Convert modified data in"

    What line should I be putting: var data = modifieddata.Skip(skip).Take(pageSize).ToList(); ?

  • freecexfreecex Posts: 25Questions: 4Answers: 0

    Sorry...t9.

    After
    var modifiedData = data.Select(d =>
    new
    {
    d.BrandLogo,
    d.Title,
    d.BrandName,
    d.LocationName,
    d.NumberOfApplications.New
    }
    );

    before json result,
    put
    var DTLIST= modifieddata.Skip(skip).Take(pageSize).ToList();

    and

    result = Json(new
    {
    draw = Convert.ToInt32(draw),
    recordsTotal = totalRecords,
    //recordsFiltered = recFilter,
    data = DTLIST
    }, JsonRequestBehavior.AllowGet);

  • burgoyneburgoyne Posts: 6Questions: 2Answers: 0

    Thanks @freecex

    Do you have any ideas on solving my errors? The GetValues and ToList errors are what's stopping me from running the program.

  • sasocsasoc Posts: 5Questions: 1Answers: 0

    Hi,

    This discussion helped me to setup MVC Controller correctly for server side pagination:

    https://datatables.net/forums/discussion/27216/how-to-get-the-parameters-on-mvc-controller-send-by-ajax-serverside-datatable-1-10

    See the fatih's post in this discussion.

    Cheers,
    Sašo

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