Questions on UI for WPF Forum

2 answers

45 views

Custom Aggregates in Q3 2009 sp2

How do i add my own aggregating function in the radgridview version Q3 2009 SP2? Or rather, is there any way to obtain the aggregated value from the normal SumFunction in the footer?

General Discussions

answered on 21 Jun 2011

1 answer

36 views

No design time style support?

As I browse the threads, my understanding is that there's no design time support if I'm using a Telerik theme across the whole of my application. Is this true? I have to set this in the code behind and I can't just set a merged resource in the xaml?

-Greg

General Discussions

answered on 21 Jun 2011

1 answer

128 views

RadMenuItem IsEnabled not be updated

I have a UserControl which contains numerous other controls including a RadMenu. Part of the functionality of this UserControl is to launch a modal window, I perform this by setting the UserControl:IsEnabled property to false. All the contained controls are disabled which is the desired behaviour. However, when I reset the container's IsEnabled property to true, the menu items remain disabled whereas all the other controls are active again.

I noticed that the IsEnabledChanged event is not triggered on the reactivation of the the container.

Any help would be greatly appreciated.

Menu

answered on 21 Jun 2011

4 answers

143 views

Exception when copy pasting data from gridview to excel

Hello Telerik team,

With the below grid settings I select multiple cells of the grid keeping the Ctrl button pressed.

<telerik:RadGridView x:Name="radgvActivity"

Grid.Row="2"

Margin="0"

IsReadOnly="False"

RowIndicatorVisibility="Visible"

ScrollMode="RealTime"

AutoGenerateColumns="False"

EnableRowVirtualization="True"

CanUserFreezeColumns="False"

CanUserResizeColumns="True"

Width="780" Height="600"

SelectionMode="Extended"

ClipboardCopyMode="All"

ClipboardPasteMode="Default"

SelectionUnit="Cell"

BeginningEdit="radgvActivity_BeginningEdit"

RowEditEnded="radgvActivity_RowEditEnded"

>

Now, on click of Ctrl + C, I get a System.NullReferenceException {"Object reference not set to an instance of an object."}
Please find the stack trace of the exception.

at Telerik.Windows.Controls.GridView.Clipboard.Writers.WriterBase.<GetSelectedItemsAsClipboardData>b__3(GridViewColumn c)

at System.Linq.EnumerableSorter`2.ComputeKeys(TElement[] elements, Int32 count)

at System.Linq.EnumerableSorter`1.Sort(TElement[] elements, Int32 count)

at System.Linq.OrderedEnumerable`1.<GetEnumerator>d__0.MoveNext()

at System.Linq.Enumerable.ElementAtOrDefault[TSource](IEnumerable`1 source, Int32 index)

at Telerik.Windows.Controls.GridView.Clipboard.Writers.WriterBase.RenderHeaderRow()

at Telerik.Windows.Controls.GridView.Clipboard.Writers.WriterBase.Render()

at Telerik.Windows.Controls.GridView.Clipboard.Writers.HtmlWriter.Render()

at Telerik.Windows.Controls.GridView.GridViewDataControl.CopyToClipboard()

at Telerik.Windows.Controls.GridView.GridViewDataControl.CopyExecuted(Object sender, ExecutedRoutedEventArgs e)

at System.Windows.Input.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e)

at System.Windows.Input.CommandManager.ExecuteCommandBinding(Object sender, ExecutedRoutedEventArgs e, CommandBinding commandBinding)

at System.Windows.Input.CommandManager.FindCommandBinding(CommandBindingCollection commandBindings, Object sender, RoutedEventArgs e, ICommand command, Boolean execute)

at System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute)

at System.Windows.Input.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e)

at System.Windows.UIElement.OnExecutedThunk(Object sender, ExecutedRoutedEventArgs e)

at System.Windows.Input.ExecutedRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target)

at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)

at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)

at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)

at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)

at System.Windows.Input.RoutedCommand.ExecuteImpl(Object parameter, IInputElement target, Boolean userInitiated)

at System.Windows.Input.RoutedCommand.ExecuteCore(Object parameter, IInputElement target, Boolean userInitiated)

at System.Windows.Input.CommandManager.TranslateInput(IInputElement targetElement, InputEventArgs inputEventArgs)

at System.Windows.UIElement.OnKeyDownThunk(Object sender, KeyEventArgs e)

at System.Windows.Input.KeyEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)

at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)

at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)

at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)

at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)

at System.Windows.Input.InputManager.ProcessStagingArea()

at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)

at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)

at System.Windows.Interop.HwndKeyboardInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawKeyboardActions actions, Int32 scanCode, Boolean isExtendedKey, Boolean isSystemKey, Int32 virtualKey)

at System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(MSG& msg, Boolean& handled)

at System.Windows.Interop.HwndSource.CriticalTranslateAccelerator(MSG& msg, ModifierKeys modifiers)

at System.Windows.Interop.HwndSource.OnPreprocessMessage(Object param)

at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)

at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)

at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)

at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)

at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)

at System.Windows.Interop.HwndSource.OnPreprocessMessageThunk(MSG& msg, Boolean& handled)

at System.Windows.Interop.HwndSource.WeakEventPreprocessMessage.OnPreprocessMessage(MSG& msg, Boolean& handled)

at System.Windows.Interop.ComponentDispatcherThread.RaiseThreadMessage(MSG& msg)

at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)

at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)

at System.Windows.Threading.Dispatcher.Run()

at System.Windows.Application.RunDispatcher(Object ignore)

at System.Windows.Application.RunInternal(Window window)

at System.Windows.Application.Run(Window window)

at System.Windows.Application.Run()

at ~\obj\Debug\App.g.cs:line 0

at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)

at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)

at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()

at System.Threading.ThreadHelper.ThreadStart_Context(Object state)

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

at System.Threading.ThreadHelper.ThreadStart()

I donot get this exception on setting the selection unit to fullrow. SelectionUnit="FullRow"

Please help with this matter.

Thanks,
Regards,
Mausami

GridView

answered on 21 Jun 2011

1 answer

110 views

Unvisible DataItemCollection

Hi,

actually in my wpf application, users can apply changes to any rows they want and eventually when they click on a "Save" button to apply pending changes.

To acheive that, I loop into "Items" property to check any row object for a specific flag in my object. The problem I have is, if the users apply a column filter before they click on the "Save" button, some changes can be missing because they are outside the filter range.

So, "Items" property contain only visible rows in GridView. Do we have acces to another DataItemCollection that contain all the data without the filters???

Thank's

GridView

answered on 21 Jun 2011

3 answers

68 views

And another theming situation

Hi guys,

Has anyone successfully applied third party theme to RadGridView? How much effort involved ? This is our predicament: we really like Telerik controls especially the RadGridView but Business is kinda worried about its look being very different from the rest of non-Telerik controls. The option of migrating everythiing to Telerik controls is just not practical at this point because of schedule contraint.

So, if someone has attempted the feat we're planning, could you please provide us ideas and starting point?

Thanks
Gio

GridView

answered on 20 Jun 2011

3 answers

150 views

Issue of RadGridView Binding to a ListCollectionView with same parent type but multiple children types

Hi Admin,

I did some search in this forum and it seemed that no similar topic has been post.

I have an ObservableCollection<AbstractEntity> which contains some derived class instances such as CustomerEntity and EmployeeEntity. Binding this collection to a RadGridView ItemsSource is ok. Data is displayed correctly.

I want to apply some filters, such as showing CustomerEntity or EmployeeEntity only. So I defined a ListCollectionView like this:

var peopleCollectionView = (ListCollectionView)CollectionViewSource.GetDefaultView(this.People);

then bind the RadGridView ItemsSource to this ListCollectionView, and apply the filters to the ListCollectionView.

The filters work fine. But I found whenever there are multiple derived types of instances in the collection, the RadGridView shows the rows but the content in all the cells are empty.

I checked the output and did not see any GUI exception.

Is it a known issue? Is there any solution for this?

Thanks,
Stephen

GridView

answered on 20 Jun 2011

3 answers

80 views

Simple Carousel with 10 Buttons?

Hi,,

i'm looking for a very simple RadCarousel where i can add 10 buttons. Which Carousel should i use? How to cklick this Buttons?

Thank's a lot
Regards
Rene

Carousel

answered on 20 Jun 2011

3 answers

136 views

Chart - sqlite

Hi,

is there any example how to bind a sqlite Database to a RadChart? I can't find anything.

thanks a lot
regards
rene

Chart

answered on 20 Jun 2011

3 answers

174 views

Updating carousel when collection changes

I'm binding my carousel to a child collection of an item on my ViewModel. This collection is an EntityCollection, but when I add an item to that bound collection, it's not being reflected in the carousel. It's not picking up the change.

My bound collection is a child collection to a EF entity object on my viewModel. I've tried capturing the event on my viewmodel and Raising a PropertyChanged on it, but that doesn't work either. My code is being fired, but that isn't updating the carousel. Maybe because I'm raising a propertyChanged, not a collection Changed?

Carousel

answered on 20 Jun 2011