Question on Grid Datasource Read with Array Parameters

[Kolie]

Hi I am looking into building products using KendoUI MVC as potential tool in future. I have been messing around in the trial and for the most part it is fairly straight forward. I have run into one issue as follows.

I have a controller for a Contact. It has one view in particular, ViewDetails

1.public  ActionResult ViewDetails(long[] contactId)
2.{
3.    ViewData["contactId"] = contactId;
4.    return View();
5.}

It takes a list of contacts passed in as an array, assigns it to the viewdata and returns the View. This view has a KendoUI Grid in it and the code is as follows

01.@{
02.    ViewBag.Title = "ViewDetails";
03.    Layout = "~/Views/Shared/_Layout.cshtml";
04.}
05.
06.<h2>ViewDetails</h2>
07.
08.
09.@(
10.
11.        @Html.Kendo().Grid<DetailGridViewModel>()
12.             .Name("Grid")
13.             .Columns(columns =>
14.                          {
15.                              columns.Bound(p => p.ContactId).Hidden();
16.                              columns.Bound(p => p.ContactNumber);
17.                              columns.Bound(p => p.ContactName);
18.                              columns.Bound(p => p.Date).Width(130).Format("{0:d}");
19.                              columns.Bound(p => p.ContactStatus);
20.                              columns.Bound(p => p.Type);
21.                              columns.Command(command =>
22.                                                  {
23.
24.                                                  }).Width(200);
25.
26.                          })
27.
28.
29.        .Sortable( )
30.        .Resizable(resize => resize.Columns(true))
31.        .Filterable()
32.        .DataSource(dataBinding =>
33.                         dataBinding.Ajax().Aggregates(agg => { agg.Add(com => com.Value).Sum();
34.                                                                agg.Add(p => p.ContactCost).Sum();
35.                         }).Read(read => read.Action("_SelectDetails", "Contacts").Data(obj => new {contactId = ViewData["contactId"]}))))
36.

The problem I am having occurs on line 35. When I try to assign the Data for "contactId", in the resulting javascript it appears that the only data is System.Int64[] like it called ToString on the data instead of taking the array and passing its contents as multiple named parameters.

The select function of course fails as there is not a proper contactId parameter passed, it is as follows for reference

01.public ActionResult _SelectDetails([DataSourceRequest] DataSourceRequest request,long[] contactId)
02.{
03.    List<DetailGridViewModel> finalList = new List<DetailGridViewModel>();
04.    foreach (var conId in contactId)
05.    {
06.        var con = _contactService.GetContactById(conId);
07.        IEnumerable<DetailGridViewModel> coms = con.Select(x => new DetailGridViewModel(x));
08.        finalList.AddRange(coms);
09.    }
10.
11.    return Json(finalList.ToDataSourceResult(request));
12.}

Thanks for your assistance. This is one of the few snags I have seen reviewing the product, I hope to get it resolved so I can continue my evaluation in a timely fashion!

[Vladimir Iliev]

Hi Kolie,

 
Basically passing array from controller to JavaScript variable on the View is not directly related to the KendoUI but is a general programming task. You can use the following approach to stringify correctly the array:

.Read(read => read.Action("_SelectDetails", "Contacts").Data(obj => Html.Raw(Json.Encode(ViewData["contactId"]))))

 Kind Regards,
Vladimir Iliev
Telerik