Hi,

I am using the Virtual Queryable Collection View with the telerik Grid Views. When I scroll using the Mouse Wheel and the Scroll Direction is Down it calls the Items Loading event which lets me fetch the next set of view models; However when the scroll direction is UP using the Mouse Wheel I would like to load the set of View Models which are above the current item. This will avoid firing the Items Loading event for every single Item when scrolling UP using the Mouse Wheel.


Please refer the image file attached for more details.

Thanks,
PD.

I am somewhat new to WPF and styling, but I understand most of the basics.

I have managed to modify the expander as well as a few other items.

But one simple thing has escaped me - styling the foreground of the RadTreeViewItem.

This:
<Style TargetType="{x:Type telerik:RadTreeViewItem}">
   <Setter Property="Foreground" Value="#ffff0000"/>
</Style>
is not only not setting the font color, but no items show up.

Any help?  I'm sure it's simple.

Also, I second the suggestion for more examples and perhaps more documentation.

This is my favorite page: http://www.telerik.com/help/wpf/radtreeview-structure.html

Thanks!

Running the latest 2013 version.

I read this:
http://www.telerik.com/help/wpf/radgridview-performance-tips-tricks.html

And it makes sense that a large dataset should be time consuming...
"Binding large dataset to the RadGridView is a time consuming task that can at times test the user’s patience."

I'm binding to 10 items and it takes 62 milliseconds (measured from DataLoading to DataLoaded). However, the control takes around a second to display the items. This makes no sense at all. I have bound to a simple data item with simple dependency properties:

<Window x:Class="Vironova.MiniTem.Views.MyTableWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
        Title="MyTableWindow" Height="700" Width="300">
        <telerik:RadGridView x:Name="radGridView" Width="Auto" Height="Auto" AutoGenerateColumns="False" ItemsSource="{Binding MyViewModel.MyObjects}" SelectionMode="Multiple" DataLoadMode="Asynchronous">
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding MyType}" Header="Type"/>
                <telerik:GridViewDataColumn DataFormatString="F1" DataMemberBinding="{Binding Value}" Header="Value"/>
            </telerik:RadGridView.Columns>   
        </telerik:RadGridView>
</Window>

MyObjects is an ObservableCollection<>.

Also, when scrolling this list of items (setting the height to a lower value) it lags.

What could be causing this?

UPDATE: I just realized that all filter functions seem to clear the list. If I sort on the first column, the items go away. I then have to click two times until the sort arrow disappears - then the items are re-populated (after a second of wait).

I was trying to get the "Databinding" tab control demo working that allows you to dynamically add and remove tabs, and I don't see how to set the content for the currently selected tab. This is what I would like to do.

I have a search button. When I press the search button, I want to be able to dynamically add content to the selected tab. The content should remain when the user switches tabs as well(I am assuming for this I just need to set the IsContentPerserved flag). I would like to be able to do this in the code-behind, as I am pulling data with entity framework to populate a user control, which I will then put in the selected tab. How would I do this? Thank you.

Hi.

I'm struggling to fit the PivotGrid to my use case and can't seem to find any relevant example.
Basically, I have two group levels, let's say Product Category (first level) and then Product Name (second level, with each category containing one or more products). The Product Sale Amount is the numeric value I need to group on (Sum). The columns of the pivot will be the sale dates, in months. The problem is that products could be in different currencies, but each product is always in the same currency.
Would it be possible to have the Level 2 as "Product Name" + "Currency", as two adjacent columns? I can get the currency as a third level but that is not ideal since I need to unnecessarily expand an extra level.
Also, since it would be incorrect to sum amounts in different currencies, would it be possible to remove (or hide) the "Grand Total" column for Level 1 only?

Many thanks
Domenico

Hi,

The default color with Expression DarkTheme is hard to see, how can I easy change that?

Despite looking through the on-line documentation, searching the forums, viewing the examples, searching the Toolbox in the VS2012 IDE and examining the properties for a 2D pie chart I have found nothing on how to create a 3D pie chart.

Can someone please point me in the right direction.

I have a radmenu inside a grid row that is nested inside Prism regions about 3 deep.
I want the menu to take all the available space in the row that is set to width = *
The menu seems to be setting it's own width, causing all the dynamic layout in the WPF app to croak because the menu is "Sized"
I want the menu to look like a normal menu and fill the rest of the dead space on the right. So when I maximize or resize WPF just does it's magic. In short the menu cannot have any determinate width.

How do I do that?

Never mind, this works:

<Grid><Cell *>
<StackPanel Orientation="Vertical" HorizontalAlignment="Stretch">
RadMenu Here
</StackPanel>

I have a RadMap control with a VisualizationLayer that I've bound to a collection of model view objects. When I add objects to be displayed on the map and then dynamically change the application's theme (by removing and adding the Telerik ResourceDictionaries) an InvalidOperation Exception is thrown by the VisualizationLayer of the RadMap.

Is this a bug with the Telerik controls or am I doing something wrong? Please see the WPF project that replicates this error uploaded here: https://dl.dropboxusercontent.com/u/22608/MapThemesCrash.zip

Thanks!

Is it possible to use VirtualQueryableCollectionView with ItemsLoading event to get the data for my current scroll position? Now it looks like it is sending requests to get all data from the begin to my scroll position.