ASP.NET MVC 4 Grid State grouping issue

[Anas]

Hi

I have a issue while trying save the grid state and loading it back if grouping is there "Uncaught TypeError: Cannot read property 'length' of undefined "

Steps to reproduce
1. Go to Products link in home page.
2. Group with any column in the grid (which will save the state to local storage).
3. refresh the page (this gives the error mentioned above in developer options console).

Please provide a suitable resolution for the same.

Note: I have attached the sample project (aspnetmvc-episode3.zip)

Regards
Anas

[Daniel]

Hello Anas,

I posted my reply in the support ticket that you have opened with the same question. For convenience, I am pasting it below:

You should use the autoBind option to prevent the initial binding when using this approach e.g.

Html.Kendo().Grid<Product>()
    .Name("Products")
    .AutoBind(false)

Otherwise, the initial request will still be made and an error will be thrown when there are groups but not grouped data is returned from the server.


Regards,
Daniel
Telerik

[Tonny]

Hi Daniel,

I tried the attached sample project with your recommendation to set auto binding to false but it still does not work. Whenever I drop a column to the head for grouping the error occurred.

I actually could not make this grouping feature working at all.

Using this sample project, I updated a little bit to remove the event but just add group  as following code

@(Html.Kendo().Grid<

 

Product>()

.Name(

 

"Products").Columns(c => {

c.Bound(p => p.Name);

c.Bound(p => p.Supplier.Name).Title(

 

"Supplier");

c.Bound(p => p.Category.Name).Title(

 

"Category");

c.Bound(p => p.UnitPrice).Format(

 

"{0:c}");

c.Bound(p => p.UnitsInStock);

c.Bound(p => p.Discontinued);

})

.DataSource(d => d

.Ajax()

.Read(r => r.Action(

 

"Get", "Products"))

.PageSize(5)

.Group(p=>p.Add(t=>t.Name))

)

.Pageable()

.Groupable()

.Sortable()

.Filterable()

 

//.Events(e => e.DataBound("SaveLayout"))

)

This does not work at all. As long as I run this, it has the exception saying Unable to get value of the property 'length' (please see attached files for detail). I also opened a ticket for you 777459

Can you please let me know how could I make the grouping feature working?

Thanks,
Tonny

[Haluk]

Can you help me on this post 

http://www.telerik.com/forums/telerik-mvc-grid-row-values-failing-after-group-by

[Daniel]

Hello Haluk,

The topic of this thread differs from the one that you provided. Please post any additional questions that you may have on that topic there. 

Regards,
Daniel
Telerik