No JSON Data rendering in grid

[David]

I am using Kendo UI for ASP.Net MVC 2015.2.   I have defined a grid using razor syntax as follows:

 

                                                                Html.Kendo().Grid(Of NameValue)() _
                                                                .Name("grdTerms") _
                                                                .DataSource(Function(ds) ds.Ajax() _
                                                                .Batch(True) _
                                                                .ServerOperation(False) _
                                                                .Read(Function(r) r.Data(UIHelper.ToJSON(Model.MyNameValues)))) _
                                                                .Columns(Sub(c)
                                                                             c.Bound("Name").Title("My Name")
                                                                             c.Bound("Value").Title("My Value")
                                                                         End Sub) _
                                                                .Pageable(Function(pager) pager.Input(True).Numeric(False).Info(True).PreviousNext(True).Refresh(True).PageSizes(True)) _
                                                                .Scrollable() _
                                                                .Render()

 

The generated JQuery for the grid in the view shows that the datasource has JSON data assigned, yet no data appears in the grid.  The view code is generated as follows:

 

<div class="k-widget k-grid" id="grdTerms"><div class="k-grid-header"><div class="k-grid-header-wrap"><table><colgroup><col /><col /></colgroup><thead class="k-grid-header"><tr><th class="k-header" data-field="Name" data-index="0" data-title="My Name" scope="col"><span class="k-link">My Name</span></th><th class="k-header" data-field="Value" data-index="1" data-title="My Value" scope="col"><span class="k-link">My Value</span></th></tr></thead></table></div></div><div class="k-grid-content" style="height:200px"><table><colgroup><col /><col /></colgroup><tbody><tr class="k-no-data"><td colspan="2"></td></tr></tbody></table></div><div class="k-pager-wrap k-grid-pager"><a class="k-link k-pager-nav k-state-disabled k-pager-first" data-page="1" href="#" title="Go to the first page"><span class="k-icon k-i-seek-w">seek-w</span></a><a class="k-link k-pager-nav k-state-disabled" data-page="0" href="#" title="Go to the previous page"><span class="k-icon k-i-arrow-w">arrow-w</span></a><span class="k-pager-input k-label">Page<input class="k-textbox" type="text" value="1" />of 1</span><a class="k-link k-pager-nav k-state-disabled" data-page="2" href="#" title="Go to the next page"><span class="k-icon k-i-arrow-e">arrow-e</span></a><a class="k-link k-pager-nav k-state-disabled k-pager-last" data-page="1" href="#" title="Go to the last page"><span class="k-icon k-i-seek-e">seek-e</span></a><span class="k-pager-sizes k-label"><select><option>5</option><option>10</option><option>20</option></select>items per page</span><a class="k-pager-refresh k-link" href="/Test/Test" title="Refresh"><span class="k-icon k-i-refresh">Refresh</span></a><span class="k-pager-info k-label">No items to display</span></div></div><script>
jQuery(function(){jQuery("#grdTerms").kendoGrid({"columns":[{"title":"My Name","field":"Name","encoded":true},{"title":"My Value","field":"Value","encoded":true}],"pageable":{"input":true,"numeric":false,"refresh":true,"pageSizes":[5,10,20],"buttonCount":10},"messages":{"noRecords":"No records available."},"dataSource":{"type":(function(){if(kendo.data.transports['aspnetmvc-ajax']){return 'aspnetmvc-ajax';} else{throw new Error('The kendo.aspnetmvc.min.js script is not included.');}})(),"transport":{"read":{"url":"","data":[{"Name":"Test 1","Value":"1","Tag":""},{"Name":"Test 2","Value":"2","Tag":""},{"Name":"Test 3","Value":"3","Tag":""}]},"prefix":""},"pageSize":10,"page":1,"total":0,"schema":{"data":"Data","total":"Total","errors":"Errors","model":{"fields":{"Value":{"type":"object"},"Tag":{"type":"string"},"Name":{"type":"string"},"Dirty":{"type":"boolean"},"SupressEvents":{"type":"boolean"}}}},"batch":true}});});
</script>

 

As can be seen, the dataSource has data assigned - "data":[{"Name":"Test 1","Value":"1","Tag":""}, .... yet the grid renders empty.

What am I missing?

 

 

[David]

Configuring the datasource to call a method on the controller for the data works:

.DataSource(Function(ds) ds.Ajax().Batch(True).ServerOperation(False).Read(Function(r) r.Action("TestData_Read", "Test")))

 

Configuring the datasource to read from a local json data array does not:

.DataSource(Function(ds) ds.Ajax().Batch(True).ServerOperation(False).Read(Function(r) r.Data("[{""Name"":""Test 1"",""Value"":""1""},{""Name"":""Test 2"",""Value"":""2""}]")))

 

The datasource json data is part of the model, so I don't want to have to do another call to the controller to fetch it.

 

[Rosen]

Hello David,

In order to set the data for local data binding you should either pass via in the Grid's constructor (as shown in this demo) or by using Grid's BindTo method. The Data method of the Read action purpose is to assign a JavaScript function in which to provide additional data for the request not to assign data to the DataSource.

Regards,
Rosen
Telerik