I am trying to create dynamic columns by creating column header and assigning the list of string values based on the index to the column databinding and while i am trying to add aggregation to the columns i am facing runtime issue as mentioned below.

"No generic method 'Sum' on type 'System.Linq.Enumerable' is compatible with the supplied type arguments and arguments. No type arguments should be provided if the method is non-generic."

I am unable to resolve this issue after number of workarounds.

 Kindly provide me a solution ASAP.

Regards,

Karthikeyan R

Hi *,

I try to use the selection changed Event for the cartesian Chart to notify another view.

It works fine but I recognized that there is no possibility to select an item with the null value (see attached Picture).

Any ideas?

Thx

Rostislaw

I have a radlistbox which has images, title and createddate of them. I showed images and title but i don't know what this listbox sort by. How can i sort listbox by createddate?

Something likes 

                                <telerik:RadGridView.SortDescriptors>
                                    <telerik:SortDescriptor Member="DateCreate" SortDirection="Ascending" />
                                </telerik:RadGridView.SortDescriptors>

of gridview.

Such as 'example.png', ListBox shows image and title, I want it to sort by created date.

Hi,

I have simple diagram (container and three items inside) as you can see on before.jpg.

When select container shape and quick drag in other place, connection change as you can see on after.jpg

This is really disturbing, beacuse in diagram with many elements inside container dragging makes it looks unreadable. Connections are arranged senselessly, not the same as user create them but random.

Any ideas?

I use the SDK sample - "Custoizing item" to change the item color

but when I try to get SelectedItem. it  always be null. it seems it can not be selected

ItemTemplateSelector="{StaticResource ItemTemplateSelector}"

 <local:CustomItemTemplateSelector x:Key="ItemTemplateSelector"
InstantItemTemplate="{StaticResource InstantItemTemplate}"
ItemWithDurationTemplate="{StaticResource ItemWithDurationTemplate}"/>
    

-Jacky

Hello!

I need to move the splitters at runtime. It's possible? How?

I'm using Telerik WPF 2015.1.

Thank you!

Hi,

I have defined custom filtering control like this. It's a custom control.

 But when I use it as filtering control for column like this:

 Binding to AgendaItemTypes not works. Ok it is because telerik FilteringControl class, which is base class for my custom filtering control, sets DataContext to FilteringViewModel. FilteringViewModel does not contains property AgendaItemTypes.

But when I change binding of Items property to element which has right datacontext i.e. like this:

 Binding still not work. Can someone give me advice please?

Hello!

I have a question about Prism and RadWindow, In Prism's  Samples of Wpf on GitHub, there is a "InteractivityQuickstart ",

in this sample, alert ,confirm and window are Window but not RadWindow,

and I find there are 3 Window Control in PrismLibrary named "DefaultConfirmationWindow","DefaultNotificationWindow" and "DefaultWindow",

I want to know is there any way to show Telerik alert ,confirm, prompt and pop window in Prism mode?

If I replace the 3 Window Control by RadWindow in PrismLibrary, there will no Icon in alert ,confirm and prompt. if I set a Icon, it can not fit for different themes.

Is there some good solution?

I am stumped on this, and I think its my way of thinking, but simply, I cannot follow how to add further timeline points during runtime.  I can follow the examples given on the Telerik website easily enough, which get you to a point on initially running the example of having a selection of random points on the timeline, but to then add further ones is not working for me.

 I am using VB.net, can you point me in the right direction for this - any help is appreciated, thanks (consider me at a beginner level, ta)