Hi,

I am adding RadPanes dynamically to RadPaneGroups in a RadDocking control. The RadPanes have a customer header datatemplate that contains a button to close it. I get the following exception on calling RemoveFromParent() on the RadPane.

System.NullReferenceException was caught
  HResult=-2147467261
  Message=Object reference not set to an instance of an object.
  Source=Telerik.Windows.Controls.Navigation
  StackTrace:
       at Telerik.Windows.Controls.Primitives.TabStripPanel.<>c__DisplayClass14.<MeasureOverride>b__7(UIElement item)
       at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext()
       at System.Linq.Enumerable.Max(IEnumerable`1 source)
       at Telerik.Windows.Controls.Primitives.TabStripPanel.<>c__DisplayClass14.<MeasureOverride>b__6(Double total, List`1 next)
       at System.Linq.Enumerable.Aggregate[TSource,TAccumulate](IEnumerable`1 source, TAccumulate seed, Func`3 func)
       at Telerik.Windows.Controls.Primitives.TabStripPanel.MeasureOverride(Size availableSize)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.ContextLayoutManager.UpdateLayout()
       at Telerik.Windows.Controls.RadPane.OnDocumentHostTemplateChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
       at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
       at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
       at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
       at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
       at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
       at System.Windows.StyleHelper.InvalidateContainerDependents(DependencyObject container, FrugalStructList`1& exclusionContainerDependents, FrugalStructList`1& oldContainerDependents, FrugalStructList`1& newContainerDependents)
       at System.Windows.StyleHelper.DoStyleInvalidations(FrameworkElement fe, FrameworkContentElement fce, Style oldStyle, Style newStyle)
       at System.Windows.StyleHelper.UpdateStyleCache(FrameworkElement fe, FrameworkContentElement fce, Style oldStyle, Style newStyle, Style& styleCache)
       at System.Windows.FrameworkElement.OnStyleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
       at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
       at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
       at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
       at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
       at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
       at System.Windows.FrameworkElement.UpdateStyleProperty()
       at System.Windows.TreeWalkHelper.InvalidateOnTreeChange(FrameworkElement fe, FrameworkContentElement fce, DependencyObject parent, Boolean isAddOperation)
       at System.Windows.FrameworkElement.OnVisualParentChanged(DependencyObject oldParent)
       at System.Windows.Media.Visual.FireOnVisualParentChanged(DependencyObject oldParent)
       at System.Windows.Media.Visual.RemoveVisualChild(Visual child)
       at System.Windows.Media.VisualCollection.RemoveRange(Int32 index, Int32 count)
       at System.Windows.Controls.UIElementCollection.RemoveRangeInternal(Int32 index, Int32 count)
       at System.Windows.Controls.Panel.OnItemsChangedInternal(Object sender, ItemsChangedEventArgs args)
       at System.Windows.Controls.Panel.OnItemsChanged(Object sender, ItemsChangedEventArgs args)
       at System.Windows.Controls.ItemContainerGenerator.OnItemRemoved(Object item, Int32 itemIndex)
       at System.Windows.Controls.ItemContainerGenerator.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
       at System.Windows.WeakEventManager.ListenerList`1.DeliverEvent(Object sender, EventArgs e, Type managerType)
       at System.Windows.WeakEventManager.DeliverEventToList(Object sender, EventArgs args, ListenerList list)
       at System.Windows.WeakEventManager.DeliverEvent(Object sender, EventArgs args)
       at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
       at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
       at System.Windows.WeakEventManager.ListenerList`1.DeliverEvent(Object sender, EventArgs e, Type managerType)
       at System.Windows.WeakEventManager.DeliverEventToList(Object sender, EventArgs args, ListenerList list)
       at System.Windows.WeakEventManager.DeliverEvent(Object sender, EventArgs args)
       at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
       at MS.Internal.Controls.InnerItemCollectionView._RemoveAt(Int32 index, Int32 indexR, Object item)
       at System.Windows.Controls.ItemCollection.Remove(Object removeItem)
       at Telerik.Windows.Controls.RadPaneGroup.RemovePane(RadPane pane)
       at Telerik.Windows.Controls.RadPane.RemoveFromParent()

Even calling RemovePane on the RadPaneGroup raises the exception "Object reference not set to an instance of an object."

I am using the version 2013.1.220.45. Any idea what can cause the above exception?

Thank you,

Gajan

Hi,
sorry for poor english ;-)
I'm creating a data logging software that gets temperature,pressure,... from external hardware. An IObservableCollection is used  to store new data i want to visualize them in your amazing chart tool. the logging may take days and data points adds every second.
my problem is HorizontalAxis labels, I have already used another 3rd party component ( C1.WPF.Chart ). it has a property named : "IsTime" and when enabled and bound to a TimeSpan data label formatting changed as logging continued ( seconds,minutes,hours,...). Now I'm evaluating your control and pretty sure RadChart is capable of doing the same thing much better. would please tell me how?
mentioned component looks like this :

thanks in advance

How could I make visible groupings of Tiles with the RadList?  Maybe a thin outline around them and/or a Label. 

Hi Guys

I am currently trying out your radGridView for its hierarchical ability with the hope to purchase if I can get the following to work:

I need to be able to create the hierarchical gridview, with the child being bound to a collection of the original collection. To explain...

I have the following 3 simple classes

public class Task
{
string Name;
string Description
}

public class Phase
{
string Name;
string Description;
ObservableCollection<Task> Tasks
}

public class Project
{
string Name;
string Description
ObservableCollection<Phase> Phases
}

As you can see above, Tasks is a collection within Phase and Phases is a collection within Project.
Now what I want to do with displaying this is Project to be the "root"/"parent", the collection of Phases as the "child" to Project and the collection of Tasks as the "child" to Phases.

Is this possible with the RadGridView? If so, could you PLEASE point me in the right direction to achieve this layout with the RadGridView?

If you need any more info please ask!

Thanking you in advance!

Hello.
1) I have WPF application with RadDiagram and RadDiagramToolbox components.
2) I create GalleryCollection with my owner shapes:

This is GetShape method:

 3) My shapes I get from database. There are samples of my shapes:

-Shape1:

+Shape2:

+Shape3:

-Shape4:

+Shape5:

-Shaep6:

4) Then I binding GalleryCollection:

5) When I run my application it's OK. My shapes showing into RadDiagramToolbox. When I try drug&drop Shape2 or Shape3 or Shape5 it's OK too. 
But when I try drug Shape1 or Shape4 or Shape6 I get exception (I get exception when Path tag has CombinedGeometry tag):

Object reference not set to an instance of an object.

Do you have any ideas?

Is there a way to make the TileList able to work like buttons? Like the windows start screen? where you can click on a tile and it has a "Clicked" or "Touched" event that can be used to navigate to another view? Having it selectable and all but that should only be on right clicking or tap & hold.

Hello all,

I have been trying to implement RadDiagram in an MVVM way, using Caliburn.Micro and I'm coming to the conclusion that this just doesn't fit well with the Telerik controls architecture. I would love it if someone can prove me wrong.

I've looked at every sample app from these forums and Telerik's help, often confused at the reams of <style> code I have to wade through to make sense of anything, and I've still not found a simple answer to my issues.

The following are my goals:

• Use UserControls, not Styles, to implement my shapes

- I like that the UserControls can easily be designed in Blend or Visual Studio
- I like that the visual implementation is modular within each UserControl
- unless someone can propose an elegant, organized solution using styles/ResourceDictionaries

• Use MVVM architecture and Caliburn.Micro to locate views for the viewmodels (viewmodel-first approach)

- All the examples of MVVM implementation I've seen seem clunky, but maybe I'm just not seeing the forest through the trees.

• Have multiple custom shapes on a RadDiagram

- Unless I'm missing something, it appears that you must override the Template for type:RadDiagramShape to show your custom control visual. I don't like having this xaml mixed in with the main RadDiagram xaml. I'd like to separate it into the custom shape xaml for clarity.
- it also appears that I need to create a custom RadDiagram control and override IsItemItsOwnShapeContainerOverride (etc),
instantiating each custom shape depending on the type of the object passed in.

I want to use RadGridView as a simple Listbox but with built in editing capability, like a File Explorer file list in which you can rename the files.

I think I've worked most of it out like removing all of the surrounding borders and gridlines, disabling the icon row and removing the cell focus rectangle, but I'm not sure how to modify the in place editing functionality.

I want to disable editing via overwriting the text, and I don't want pressing enter during editing to move edit mode on to the next cell down. And after editing I do not want using the arrow keys to move edit mode to other cells. The only edit support I want to keep is entering edit mode either programatically (which will be via a context menu item), or by pressing the F2 hotkey.

I've tried handling PreparingCellForEdit but the event args doesn't seems to indicate what triggered the edit, which makes cancelling particular edit modes impossible.

Hi Guys,

 

In our WPF application, we need to show the empty rows in the grid based on the grid size before loading the data from the database. Currently it is not showing the empty rows in the grid. We used component one grid in our previous application. By default that control show the empty rows before loading the data. How can we achieve this showing empty row in the telerik grid without data?

 

I would appreciate your help. Thanks in advance

Raja

Hello,

I'm having such an issue i've been struggling for hours.
First of all, I'm using data template to show some custom data from my custom appointment.
The first thing that is occuring is that after an update on any existing appointment, the data template don't refresh.

I tried many things but none worked. I may totally be missing something, but i can't see it... ):

Anyway, another issue occurs in this case:
- i have two or three appointments, one followed by the other, something like that:


- I created a custom appointment and i made some custom resources. If i change the custom resource in Appointment 2, for example, and save it, OK, it saves (and that's when the first issue occurs - the scheduleView doesn't change)

- If I select Appointment 1 and open it, the custom resource i saved in Appointment 2 is set to Appointment 1. (and well, it was not suposed to be the same). I could not find a pattern for this issue, it's kind of randomly

I checked my database to see if there's any ambiguity or anything else, but everything is ok, all relations and stuff are ok

I'm using Q1 2012.

I'd like some help with this. I don't know where to try anything else.
Thanks