I try to enable the SelectionMiniToolbar on the RichTextBox but it doesn't show up on selected text.

When it is turned on the external formatting buttons, like B/I/U with ToggleBold/Italic/Underlined() methods are freezing out with System.NullReferenceException.

When the toolbar is not enabled everything is working well.

I think I added every references, list is attached.

Looks like the toolbar didn't initialized properly, checking the richtextbox properties it is not null, just most of it's properties. (not sure it is the expected behaviour).

Message:

"Object reference not set to an instance of an object."

Stacktrace:

   at Telerik.Windows.Controls.RichTextBoxUI.SelectionMiniToolBar.ToggleBoldCommand_ToggleStateChanged(Object sender, StylePropertyChangedEventArgs`1 e)
   at Telerik.Windows.Documents.RichTextBoxCommands.ToggleCommandBase.OnToggleStateChanged(StylePropertyChangedEventArgs`1 e)
   at Telerik.Windows.Documents.RichTextBoxCommands.ToggleCommandBase.UpdateSpanStyle()
   at Telerik.Windows.Documents.RichTextBoxCommands.RichTextBoxCommandBase.radRichTextBox_CurrentSpanStyleChanged(Object sender, EventArgs e)
   at System.EventHandler.Invoke(Object sender, EventArgs e)
   at Telerik.Windows.Controls.RadRichTextBox.OnCurrentSpanStyleChanged()
   at Telerik.Windows.Controls.RadRichTextBox.CurrentSpanStyle_PropertyValueChanged(Object sender, StylePropertyChangeEventArgs args)
   at Telerik.Windows.Documents.Model.DocumentElement.OnPropertyValueChanged(IStylePropertyDefinition propertyDefinition, Object oldValue, Object newValue)
   at Telerik.Windows.Documents.Model.Styles.StyleProperty`2.OnPropertyValueChanged(TValue oldValue, TValue newValue)
   at Telerik.Windows.Documents.Model.Styles.StyleProperty`2.CheckForValueChange(RadValueSource changedValueSource)
   at Telerik.Windows.Controls.RadRichTextBox.ToggleBold()
   at HeatGun.HeatGunMainWindow.RTB_Note_BoldButton_OnClick(Object sender, RoutedEventArgs e) in D:\Visual Studio Projects\Tegu Solutions\Heat Gun\WindowHeatGunMain\HeatGunMainWindow.xaml.cs:line 243
   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 e)
   at System.Windows.Controls.Primitives.ButtonBase.OnClick()
   at Telerik.Windows.Controls.RadToggleButton.OnClick()
   at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   at Telerik.Windows.Controls.RadToggleButton.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   at System.Windows.UIElement.OnMouseLeftButtonUpThunk(Object sender, MouseButtonEventArgs e)
   at System.Windows.Input.MouseButtonEventArgs.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.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
   at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
   at System.Windows.Input.MouseButtonEventArgs.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.RaiseTrustedEvent(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.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
   at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   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 HeatGun.App.Main()

Hello,

My team is facing an issue related to the Property Grid component of the WPF, there is an object that has a property of type Point that is represeted as 123.34;1232.34 in the property grid, with a default point value it works however the set value event of the property is not fired when you try to change the value of the textbox, it seems that there is no 2 way binding.

This only happens to that property, so we are suspicious it is because of the type of the property.

Can you help us?

Thank you

Hello,

I have a flexible sized GridView with a fixed bigger dataset (~50 columns * ~50 rows) and I am looking for any kind of more advanced scrolling behavior than the built in one (which is working well but not an option in my case).

So the layout size is bigger than the visible area and I would like to scroll (or pan-move?) easily inside the grid.

My ideas are 

1. Scrolling fluently both way by pressing the middle mouse button, like on a webpage for example.

2. The cells are in readonly mode, so clicking on a cell while moving the mouse maybe also can be a good option to substitute the scrollbar.

Do you have any easy solution for this question or maybe any other advice?

Hello,

My typical use case requires importing saved html into the editor. The problem I am having is that sometimes that HTML isn't always perfect and will not have a font family specified. This causes the editor to default to Verdana. For the life of me, I can't seem to figure out how to change that to be some other font. Can someone tell me where Verdana is set as the default font? I've tried setting pretty much every font property I can find, but it doesn't seem to matter when I do the html import.

Thanks!

-Tom

Hi,

1) setting ExpressionEditor.Item = DataRow, the control show correct fields (Names and Types) but it is not working (the result preview is allway empty)

2) Is possible to force a result type? In example, I want a boolean expression.

3) String Functions appears in documentation images but not in real control, why?

Thanks,

marc.

Hi,

How to get the cellborder focus rectangle (see attached) in the Telerik.Windows.Controls.RadSpreadsheet.ActiveWorksheet?

I tried this but this doesn't give the desired output:

View.sprSpecification.ActiveWorksheet
.Cells[rowIndex, colIndex]
.SetBorders(new CellBorders(new CellBorder(CellBorderStyle.Thin, ThemableColor.FromArgb(alfa: 255, red: 255, green: 0, blue: 0))));

I'm using Telerik 2017.2.614.45.NoXaml

Thanks,

Sri

Dear Telerik Team,

I have problem how to change label and get list of legend in chart WPF. For detail Question please see the attached file.

Tq.

Hello, I found a weird behavior with the trackball display when the chart is a bit large. Right now I'm displaying some statistics for a year worth of data, which demands a user scroll. I'm not using the Pan and Zoom as it adds complexity to the experience with the chart, so I'm just expanding the RadCartesianChart Width until it display all the data that I need to show, like this:

The problem is that, when I'm displaying the TrackBallInfoControl, and the Width of the Chart is higher than 15000 px, the Trackball control stops to move with the mouse and gets stuck at the 15000 px mark. The TrackBallLines are working fine, the problem only happens with the modal (tooltip) that is displayed.

The problem seems to be in the ChartTrackBallBehavior.

Why do you have such restriction, and how can I overcome it? Are there any workarounds for the RadCartesianChart and TrackBallInfoControl to make it work without facing this problem?

Thanks in advance