Dear all,

I'm using an expression editor bound against an object which is constructed via emit IL at runtime due to localizing the fields, we're using version 2014.3.1305.40.
A user now reports that he gets a null ref exception when changing an expression involving datetimes, the following stacktrace is available:
Top-level Exception
Type:        System.NullReferenceException
Message:     Object reference not set to an instance of an object
Source:      Telerik.Windows.Documents
Stack Trace:
   at Telerik.Windows.Documents.HierarchicalIndex.GetBoxByHierarchicalIndex(DocumentLayoutBox documentBox, HierarchicalIndex hierarchicalIndex) in c:\TB\534\Sources\Documents\Flow\Core\DocumentPosition\HierarchicalIndex.cs:line 131
   at Telerik.Windows.Documents.DocumentPosition.RestorePositionFromBoxIndex(Nullable`1 raiseEvent) in c:\TB\534\Sources\Documents\Flow\Core\DocumentPosition\DocumentPosition.cs:line 447
   at Telerik.Windows.Documents.Model.RadDocumentEditor.InsertTextInternal(String text, Span currentSpanStyle, Boolean explicitAcceptsReturn) in c:\TB\534\Sources\Documents\Flow\Core\Model\RadDocumentEditor_Editing.cs:line 2104
   at Telerik.Windows.Documents.Model.RadDocumentEditor.InsertFromUI(String text, Span currentSpanStyle, Boolean acceptsReturn) in c:\TB\534\Sources\Documents\Flow\Core\Model\RadDocumentEditor_Editing.cs:line 2072
   at Telerik.Windows.Controls.RadRichTextBox.Telerik.Windows.Documents.UI.ITextInputCommandsHandler.InsertText(String text) in c:\TB\534\Sources\Documents\Flow\Core\UI\RadRichTextBox.cs:line 7599
   at Telerik.Windows.Documents.UI.CaretTextInputHandler.InsertText(String text) in c:\TB\534\Sources\Documents\Flow\Core\UI\Caret\CaretTextInputHandler.cs:line 344
   at Telerik.Windows.Documents.UI.CaretTextInputHandler.HandleTextInsertedWithoutIme(RadDocument document, String text) in c:\TB\534\Sources\Documents\Flow\Core\UI\Caret\CaretTextInputHandler.cs:line 171
   at Telerik.Windows.Documents.UI.CaretTextInputHandler.CaretUI_TextInserted(Object sender, TextInsertedEventArgs e) in c:\TB\534\Sources\Documents\Flow\Core\UI\Caret\CaretTextInputHandler.cs:line 90
   at Telerik.Windows.Documents.UI.Caret.OnTextInserted(Object sender, TextInsertedEventArgs e) in c:\TB\534\Sources\Documents\Flow\Core\UI\Caret\Caret_Common.cs:line 278
   at Telerik.Windows.Documents.UI.Caret.Timer_Tick(Object sender, EventArgs e) in c:\TB\534\Sources\Documents\Flow\Core\UI\Caret\Caret_Common.cs:line 259
   at System.Windows.Threading.DispatcherTimer.FireTick(Object unused)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

Could you please provide some insights? I'm not able to reproduce the problem on my machine (only once) and fear that it might be a "race condition" involving events in the UI. What I can tell is that it happens when adjusting the date and time part of the expression according to the user, I've seen it multiple times live on screen and was able to invoke it once on my machine. The steps he did were these, he always positions the cursor by using the mouse after the value to change and uses backspace to remove the number and then types the new number, eg position after first 1 in 11, remove the first 1 by using backspace and then typing 0:

Expression at start, via binding:
(Fromdate >= #11/05/2016 06:00:00# And Todate <= #12/05/2016 06:00:00#)

Intermediate:
(Fromdate >= #1/05/2016 06:00:00# And Todate <= #12/05/2016 06:00:00#)

Intermediate:
(Fromdate >= #01/05/2016 06:00:00# And Todate <= #12/05/2016 06:00:00#)

Intermediate:
(Fromdate >= #01/0/2016 06:00:00# And Todate <= #12/05/2016 06:00:00#)

Intermediate:
(Fromdate >= #01/04/2016 06:00:00# And Todate <= #12/05/2016 06:00:00#)

Intermediate:
(Fromdate >= #01/04/2016 6:00:00# And Todate <= #12/05/2016 06:00:00#)

Intermediate:
(Fromdate >= #01/05/2016 16:00:00# And Todate <= #12/05/2016 06:00:00#)

Intermediate:
(Fromdate >= #01/05/2016 06:00:00# And Todate <= #2/05/2016 06:00:00#)

Intermediate:
(Fromdate >= #01/05/2016 06:00:00# And Todate <= #02/05/2016 06:00:00#)

Intermediate:
(Fromdate >= #01/05/2016 06:00:00# And Todate <= #02/0/2016 06:00:00#)

Changing May to April invokes the exception when typing the 4:
(Fromdate >= #01/05/2016 06:00:00# And Todate <= #12/04/2016 06:00:00#)

Hope you can help me out with this one since it's bugging the user for quite some time now.

Kind regards,
Dwight

While using the RadNumericUpDown control in our product we want a global way to disable the scroll wheel functionality that increases/decreases the value by a given step.

RadMaskedNumericInput is easy...

<Setter Property="SpinMode" Value="None" />

But I cant find anything for a global style to disable this functionality.

Is there something I might be missing or is there no way in a style to achieve this like there is with the masked numeric input

Hello I posted a question here: https://www.telerik.com/forums/gridviewcheckboxcolumn-checkbox-command#zvPzrS8xrECwPcG1wGYRTA and realized afterwards that the thread might be closed. Anyroad, I have a problem similar to the original poster. My ApprovalStatusEditCommand is not being fired. Also, as a side note, the DataMemberBinding is not necessary. Even without it the "IsChecked" bindings seem to be updating the object - even though the "IsApproved" is underlined (in Visual Studio) as "cannot resolve."

Any help resolving this would be much appreciated. Basically, I'm trying to execute a command if a checkbox (in a radgridview) is checked.

Kind regards,

Jonathan

P.S. I'm sorry if I created a duplicate post, but all my research has not really helped me work around this.

Hi!

When creating a diagram with too many items with AutoLayout, it seems there is a maximum width the diagram will grow to.

Which causes a weird behavior of the items being places vertically.

Is it possible to set the width of the available space for the auto layout?

I've added a screenshot demonstrating the behavior.

Thanks!

Method to reproduce 
（telerik version 2018.1.220）

1. Create a structure that has enum with [Flags] attribute as members
2. Set the array of the above structure to SourceItems of RadPropertyGrid
3. Set "Intersection" or "Union" for "PropertySetMode" of "RadProeprtyGrid"
4. Run the application
5. Changing enum member flags from PropertyGrid with FlagEnumEditor will not be applied.
   In addition, the following exception occurs when changing the flag

---
Exception thrown: 'System.InvalidCastException' in mscorlib.dll
Exception thrown: 'System.InvalidCastException' in mscorlib.dll
Exception thrown: 'System.Reflection.TargetInvocationException' in mscorlib.dll
System.Windows.Data Error: 8 : Cannot save value from target back to source. BindingExpression:Path=CurrentPropertySet[Types]; DataItem='PropertySetViewModel' (HashCode=30131813); target element is 'FlagEnumEditor' (Name=''); target property is 'Value' (type 'Object') InvalidCastException:'System.InvalidCastException: 'System.String' から 'enum_flags_test.MainWindow+EnumTest+Type' への無効なキャストです。
   System.Convert.DefaultToType(IConvertible value, Type targetType, IFormatProvider provider)
   System.String.System.IConvertible.ToType(Type type, IFormatProvider provider)
   System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider)
   Telerik.Windows.Controls.RadPropertyGrid.<>c__DisplayClass2b.<OnPropertySetViewModelChanged>b__28(Object s, PropertyChangedEventArgs e)
   System.ComponentModel.PropertyChangedEventHandler.Invoke(Object sender, PropertyChangedEventArgs e)
   Telerik.Windows.Controls.Data.PropertyGrid.PropertySet.OnPropertyChanged(String fileName)
   Telerik.Windows.Controls.Data.PropertyGrid.PropertySet.set_Item(String property, Object value)'

---

Is there any workaround? 
Your help would be welcomed.

---

MainWindow.xaml.cs

MainWindow.xaml

Hello, how do we set the `GridViewDataColumn` to capture Tab and indent the text in the cell instead of moving to another cell?

Thank you,

Jan