Kendo UI error in MVC 5 - kendo-ui

Question

Upgraded my applicaiton from MVC 3 to mVC 5 and kendo UI to Q1 2014. Got this exception
"An exception of type 'System.NullReferenceException' occurred in App_Web_field.master.78ead928.iz8p2r9r.dll but was not handled in user code
Additional information: Object reference not set to an instance of an object."
here is my .cshtml file
#(Html.Kendo().Grid<CustomerModel>()
.Name("grid")
.Columns(columns => {
columns.Bound(p => p.Sender);
columns.Bound(p => p.Body);
})
.Selectable(s => s.Mode(GridSelectionMode.Single))
.Groupable()
.Events(ev => { ev.DataBound("onDataBound").Change("onChange"); })
.DataSource(dataSource => dataSource
.Ajax()
.ServerOperation(false)
.PageSize(20)
.Model(model =>
{
model.Field(c => c.Sender).Editable(false);
model.DateTimeField(c => c.Sent).Editable(false);
})
.Read(read => read.Action("GetCustomers", Html.CurrentControllerName()))
)
)
intellisense says System.Web.WebPages.Html.HtmlHelper doesnot contain a definition for kendo.
here is the stack trace
[NullReferenceException: Object reference not set to an instance of an object.]
ASP.views_inputbuilders_displaytemplates_field_master.__Render__control1(HtmlTex tWriter __w, Control parameterContainer) in
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +268
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +8
System.Web.UI.Control.Render(HtmlTextWriter writer) +10
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +57
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +128
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +8
System.Web.UI.Page.Render(HtmlTextWriter writer) +29
System.Web.Mvc.ViewPage.Render(HtmlTextWriter writer) +53
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +57
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1386

Answer 1

Have you updated the kendo.mvc.dll reference?
Also do you have the Kendo.Mvc.UI namespace in your pages webconfig? (I generally find this is the issue when #html.kendo() is not found by intellisense)
Since you have added the required reference to all logical places then, give the project a clean and rebuild. (If you have had to include the namespace into the views webconfig just restart visual studio to pick up the change - again I find it doesn't always pick up the change straight away)
Other than seeing the project itself it's difficult to give you a root cause of this.
Also make sure you have updated the references to the kendo.js files in your layout page.
(Paul I know this still doesn't answer the question but I am trying to help a fellow developer here with minimal information being provided)

Answer 2

This line tells me you're missing the namespace in the view web.config:
intellisense says System.Web.WebPages.Html.HtmlHelper doesnot contain
a definition for kendo.
Make sure this line is added in your views/web.config file, under the namespaces element
<add namespace="Kendo.Mvc.UI"/>
Note that if you are using areas, this must be in the web.config of the views folder in each area.