Custom Ajax Binding does not work properly - asp.net-mvc

Question

I have following code for Custom Ajax Binding. This has following problems even though it is displaying data for the first page.
• The request.Sorts is coming as NULL in to the Orders_Read method
• The request.PageSize is coming as 0 to the Orders_Read method
• The request.Page is coming as 1 to the Orders_Read method (even if I click on the page 2)
What changes need to be done here to get proper sort and pagesize values?
Note: I am using MVC Wrapper for Kendo Grid.
VIEW
#Scripts.Render("~/bundles/jquery")
<script type ="text/javascript">
$(document).ready(function (){
$('#Submit1').click(function () {
alert('1');
$('#grid12').data('kendoGrid').dataSource.read();
});
});
</script>
#model KendoPratapSampleMVCApp.Models.Sample
#{
ViewBag.Title = "CustomAjaxbind";
}
<h2>CustomAjaxbind</h2>
#using (Html.BeginForm("PostValues", "CustomAjaxBinding", FormMethod.Post))
{
<input id="Submit1" type="button" value="SubmitValue" />
#(Html.Kendo().Grid<KendoPratapSampleMVCApp.Models.Sample>()
.Name("grid12")
.EnableCustomBinding(true)
.Columns(columns => {
columns.Bound(p => p.SampleDescription).Filterable(false).Width(100);
columns.Bound(p => p.SampleCode).Filterable(false).Width(100);
columns.Bound(p => p.SampleItems).Filterable(false).Width(100);
})
.Pageable()
.Sortable()
.Scrollable()
.AutoBind(false)
.Filterable()
.HtmlAttributes(new { style = "height:430px;" })
.DataSource(dataSource => dataSource
.Ajax()
.PageSize(2)
.Read(read => read.Action("Orders_Read", "CustomAjaxBinding"))
)
)
}
Controller
public class CustomAjaxBindingController : Controller
{
//
// GET: /CustomAjaxBinding/
public ActionResult Index()
{
return View("CustomAjaxbind");
}
public ActionResult Orders_Read([DataSourceRequest(Prefix = "grid12")]DataSourceRequest request)
{
string sortField = "SampleDescription";
string sortDirection = string.Empty;
if (request.Sorts != null)
{
foreach (SortDescriptor sortDescriptor in request.Sorts)
{
sortField = sortDescriptor.Member;
if (sortDescriptor.SortDirection == ListSortDirection.Ascending)
{
sortDirection = "Ascending";
}
else
{
sortDirection = "Descending";
}
}
}
int total = 1;
int myPageSize = 2;
if(request.PageSize !=0)
{
myPageSize = request.PageSize;
}
IEnumerable<Sample> currentSamples = GetSubsetEmployees(request.Page - 1, myPageSize, out total, sortField, sortDirection);
var result = new DataSourceResult()
{
Data = currentSamples,
Total = total // Total number of records
};
return Json(result);
}
public IEnumerable<Sample> GetSubsetEmployees(int pageIndex, int pageSize, out int itemCount, string sortField, string sortDirection)
{
IEnumerable<Sample> samples = GetSamples();
itemCount = samples.ToList().Count;
var selector = new Func<Sample, object>(e => e.GetType().GetProperty(sortField).GetValue(e, null));
var query = sortDirection.Equals("descending", StringComparison.OrdinalIgnoreCase)
? samples.OrderByDescending(selector)
: samples.OrderBy(selector);
List<Sample> currentPageEmployees = query
.Skip(pageIndex * pageSize)
.Take(pageSize)
.ToList();
return currentPageEmployees;
}
public static IEnumerable<Sample> GetSamples()
{
List<Sample> sampleAdd = new List<Sample>();
Sample s12 = new Sample();
s12.SampleCode = "1";
s12.SampleDescription = "A";
s12.SampleItems = "newone";
Sample s2 = new Sample();
s2.SampleCode = "2";
s2.SampleDescription = "B";
s2.SampleItems = "oldone";
Sample s3 = new Sample();
s3.SampleCode = "3";
s3.SampleDescription = "C";
s3.SampleItems = "latestone";
Sample s4 = new Sample();
s4.SampleCode = "4";
s4.SampleDescription = "D";
s4.SampleItems = "latestoneitem";
sampleAdd.Add(s12);
sampleAdd.Add(s2);
sampleAdd.Add(s3);
sampleAdd.Add(s4);
return sampleAdd;
}
}
Model
namespace KendoUIMvcSample.Models
{
public class SampleModel
{
public List<Sample> samples;
}
public class Sample
{
public string SampleDescription { get; set; }
public string SampleCode { get; set; }
public string SampleItems { get; set; }
}
}

Answer 1

I had the same problem as yours and finally found the solution recently after consuming days on investigating the problem. I post it here if someone else faced the same issue.
You need to remove Prefix from your parameter:
public ActionResult Orders_Read([DataSourceRequest(Prefix = "grid12")]DataSourceRequest request)
Converted to:
public ActionResult Orders_Read([DataSourceRequest]DataSourceRequest request)
I don't know if this is a bug from Kendo or not! But in this scenario grid can't be found by Prefix defined.
You can find an example here