Questions on UI for WPF Forum

1 answer

159 views

Setting a custom FieldStyle causes OnFieldLoaded to be called twice for each property

Re-styling the PropertyGridField style by setting the RadPropertyGrid.FieldStyle property will cause the RadPropertyGrid.OnFieldLoaded to be called twice for each property instead of once when no custom style is specified.

PropertyGrid

answered on 12 Aug 2016

2 answers

423 views

GridView nd FontAwesome

Hi!

I must use FontAwesome in Telerik GridView for WPF - does anyone know how to do it?

FontAwesome: http://fontawesome.io/

Beste regards to all!

m@rko

GridView

answered on 12 Aug 2016

3 answers

385 views

Disable input field (force user choose date by click on calendar)

Hi telerik,

I have 2 raddatepicker which are STARTDATE and ENDDATE. My business logic constraint is START DATE must less or equal to END DATE. Now, I'm using SelectableDateStart and SelectableDateEnd property to validate selected date and it works fine. My problem is this method can't handle if user input Date by key-in.

How to disable "Key-in" function ?

My XAML :

<telerik:RadDatePicker x:Name="startDate" SelectableDateEnd="{Binding ElementName=endDate, Path=SelectedDate }" />

<telerik:RadDatePicker x:Name="endDate" SelectableDateStart="{Binding ElementName=startDate, Path=SelectedDate }" />

Please give me some advice , thank you

SweNz

DatePicker

answered on 11 Aug 2016

1 answer

69 views

ChangeStyleName crashes if Track Changes is enabled

Hi,

The line

RtbEditor.ChangeStyleName(style.Name, true);

Works perfectly when Track Changes is disabled. When it is enabled and there are tracked changes in the current paragraph, it works for the first time, but the next time it crashes with the exception

System.ArgumentNullException
Message "Value cannot be null.\r\nParameter name: owner"
   at Telerik.Windows.Documents.Model.Styles.DocumentElementPropertiesBase.SetDocumentElementOwner(DocumentElement owner)
   at Telerik.Windows.Documents.Model.Styles.ParagraphProperties.SetDocumentElementOwner(DocumentElement owner)
   at Telerik.Windows.Documents.Model.Styles.DocumentElementPropertiesBase..ctor(DocumentElement owner)
   at Telerik.Windows.Documents.Model.Styles.ParagraphProperties..ctor(DocumentElement owner)
   at Telerik.Windows.Documents.Model.Styles.ParagraphProperties.CreateInstance()
   at Telerik.Windows.Documents.Model.Styles.DocumentElementPropertiesBase.CopyPropertiesFrom(DocumentElementPropertiesBase fromProperties)
   at Telerik.Windows.Documents.Model.Styles.ParagraphProperties.CopyPropertiesFrom(DocumentElementPropertiesBase fromProperties)
   at Telerik.Windows.Documents.Commands.Styles.Paragraphs.ClearParagraphFormattingCommand.GetPropertyValue(Paragraph paragraph)
   at Telerik.Windows.Documents.Commands.Styles.Paragraphs.ChangeParagraphStyleCommandBase`2.PreserveStateBeforeExecute(TContext context)
   at Telerik.Windows.Documents.Commands.UndoableDocumentCommandBase`1.OnExecuting(DocumentCommandContextBase context)
   at Telerik.Windows.Documents.Commands.DocumentCommandBase`1.Execute(DocumentCommandContextBase context)
   at Telerik.Windows.Documents.Model.RadDocumentEditor.ExecuteChangeStyleNameCommand(StyleType type, String styleName)
   at Telerik.Windows.Documents.Model.RadDocumentEditor.ChangeStyleName(String styleName, Boolean useLinkedStyle)
   at Telerik.Windows.Controls.RadRichTextBox.ChangeStyleName(String styleName, Boolean useLinkedStyle)

I've made a workaround

var spanstyle = style.LinkedStyle;
var selection = RtbEditor.Document.Selection;
if (!selection.IsEmpty)
    foreach (var span in selection.GetSelectedBoxes<SpanLayoutBox>().Select(x => x.AssociatedSpan).Distinct().ToList())
        span.Style = spanstyle;
else
{
    var paragraph = RtbEditor.Document.CaretPosition.GetCurrentParagraphBox().AssociatedParagraph;
    if (paragraph != null)
        foreach (var span in paragraph.Inlines.OfType<Span>().ToList())
            span.Style = spanstyle;
}

And it seams to be working, but it is kind of hacking.

I'm using version 2016.1.112.45 and haven't tested with the latest one as I don't have time to test if everything else works after the upgrade.

Regards,

Daniel

RichTextBox

answered on 11 Aug 2016

1 answer

453 views

[Solved] System.ArgumentException - Source type must be an enumerable type.

Hi Telerik,

We've got unhandled exception in yours sources.

After applying filters for GridView which filter all existed items (with using ObservableCollection) we get such stack trace list:

01.System.Transactions Critical: 0 :

02.<TraceRecord xmlns="http://schemas.microsoft.com/2004/10/E2ETraceEvent/TraceRecord" Severity="Critical">

03. <TraceIdentifier>http://msdn.microsoft.com/TraceCodes/System/ActivityTracing/2004/07/Reliability/Exception/Unhandled<;/TraceIdentifier>

04. <Description>Unhandled exception</Description>

05. <AppDomain>TimeTracking.Client.vshost.exe</AppDomain>

06. <Exception>

07. <ExceptionType>System.ArgumentException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType>

08. <Message>Source type must be an enumerable type.</Message>

09. <StackTrace

>   at Telerik.Windows.Data.Expressions.EnumerableFilterOperatorExpressionBuilder.GenerateContainsMethodCall(Expression source, Expression value, Boolean shouldNegate)

10. at Telerik.Windows.Data.Expressions.OperatorValueFilterDescriptorExpressionBuilderBase.CreateBodyExpression()

11. at Telerik.Windows.Data.Expressions.FilterDescriptorCollectionExpressionBuilder.CreateBodyExpression()

12. at Telerik.Windows.Data.Expressions.FilterDescriptorCollectionExpressionBuilder.CreateBodyExpression()

13. at Telerik.Windows.Data.Expressions.FilterDescriptorCollectionExpressionBuilder.CreateBodyExpression()

14. at Telerik.Windows.Data.Expressions.FilterExpressionBuilder.CreateFilterExpression()

15.

at Telerik.Windows.Data.QueryableExtensions.Where(IQueryable source, CompositeFilterDescriptorCollection filterDescriptors)

16. at Telerik.Windows.Data.QueryableCollectionView.CreateView()

17. at Telerik.Windows.Data.QueryableCollectionView.CreateInternalList()

18. at Telerik.Windows.Data.QueryableCollectionView.get_InternalList()

19. at Telerik.Windows.Data.QueryableCollectionView.get_InternalCount()

20. at Telerik.Windows.Data.QueryableCollectionView.get_IsEmpty()

21. at Telerik.Windows.Data.QueryableCollectionView.InitializeCurrencyOnRefresh(CurrencyRefreshInfo currencyRefreshInfo)

22. at Telerik.Windows.Data.QueryableCollectionView.RefreshOrDefer()

23. at Telerik.Windows.Data.QueryableCollectionView.InvalidatePagingAndRefresh()

24. at Telerik.Windows.Data.QueryableCollectionView.OnFilterDescriptorsChanged()

25.

at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)

26. at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)

27. at Telerik.Windows.Data.ObservableItemCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)

28. at System.Collections.ObjectModel.ObservableCollection`1.InsertItem(Int32 index, T item)

29. at System.Collections.ObjectModel.Collection`1.System.Collections.IList.Add(Object value)

30. at Telerik.Windows.Data.CollectionHelper.Equalize(IList left, IList right, IEqualityComparer comparer)

31. at Telerik.Windows.Data.DataItemCollection.EqualizeFilterDescriptors()

32. at Telerik.Windows.Data.DataItemCollection.EqualizeDescriptors()

33. at Telerik.Windows.Data.DataItemCollection.set_CollectionView(QueryableCollectionView value)

34. at Telerik.Windows.Data.DataItemCollection.CreateAndSetCollectionView(IEnumerable source, Type type)

35. at Telerik.Windows.Data.DataItemCollection.SetItemsSource(IEnumerable source, Type type)

36. at Telerik.Windows.Controls.GridView.GridViewDataControl.<>c__DisplayClass20.<Bind>b__1f()

37.

at Telerik.Windows.Controls.CursorManager.PerformTimeConsumingOperation(FrameworkElement frameworkElement, Action action)

38. at Telerik.Windows.Controls.GridView.GridViewDataControl.OnApplyTemplate()

39. at System.Windows.FrameworkElement.ApplyTemplate()

40. at System.Windows.FrameworkElement.MeasureCore(Size availableSize)

41. at System.Windows.UIElement.Measure(Size availableSize)

42. at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)

43.

at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV, Boolean&amp; hasDesiredSizeUChanged)

44. at System.Windows.Controls.Grid.MeasureOverride(Size constraint)

45. at System.Windows.FrameworkElement.MeasureCore(Size availableSize)

46. at System.Windows.UIElement.Measure(Size availableSize)

47. at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)

48. at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)

49. at System.Windows.FrameworkElement.MeasureCore(Size availableSize)

50. at System.Windows.UIElement.Measure(Size availableSize)

51. at System.Windows.ContextLayoutManager.UpdateLayout()

52. at System.Windows.Controls.TabItem.OnPreviewGotKeyboardFocus(KeyboardFocusChangedEventArgs e)

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

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

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

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

57. at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)

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

59.

at System.Windows.Input.KeyboardDevice.TryChangeFocus(DependencyObject newFocus, IKeyboardInputProvider keyboardInputProvider, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)

60.

at System.Windows.Input.KeyboardDevice.Focus(DependencyObject focus, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)

61. at System.Windows.Input.KeyboardDevice.Focus(IInputElement element)

62. at System.Windows.UIElement.Focus()

63. at System.Windows.Controls.TabItem.SetFocus()

64. at System.Windows.Controls.TabItem.OnMouseLeftButtonDown(MouseButtonEventArgs e)

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

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

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

68. at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)

69. at System.Windows.UIElement.OnMouseDownThunk(Object sender, MouseButtonEventArgs e)

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

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

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

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

74. at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)

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

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

77.

at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)

78.

at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean&amp; handled)

79.

at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean&amp; handled)

80. at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

81. at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)

82. at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)

83.

at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

84.

at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)

85. at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr...

Please, suggest a direction or a clue based on the stack trace which can lead me to the problem or it's solution?

Thank you!

GridView

answered on 11 Aug 2016

10 answers

136 views

TFS / Telerik VSX

Hello,

It seems that there is an issue when projects are under TFS source control. When saving the solution or after committing changes, visual studio hangs 5 to 10 minutes. I don't have this issue when telerik extensions are not installed.

When I analyze the devenv.exe execution, I see the call to Telerik.VSX.SolutionManagement.TfsSolutionStorage.CommintAllFiles is called. What is the role of this method?

Regards.

Installer and Visual Studio Extensions

answered on 11 Aug 2016

3 answers

214 views

[Solved] How to set LayoutControl restrictions?

Is there a way to set some restrictions for the LayoutControl?

1. Is there a way to limit selection only to parent containers (LayoutControlGroup) ?
2. Is there a way to disable resizing of the control groups?
3. Is there a way to hide or customize the content of the pop-up panel?
4. Is there a way to restrict docking (i.e. allowing to move elements only vertically or horizontally) ?

LayoutControl

answered on 10 Aug 2016

4 answers

824 views

[Solved] Binding other properties to row item

Hello,

I have a I think very simple question but I cant find any solution for it. Its about binding other properties, besides the DataMemberBinding to the current item.

The scenario is as follows, I have a data object which is setup as follows:

public class EmployeeViewModel

{

public Employee EmployeeData { get; set; }

public EmployeeViewState ViewState { get; set; }

}

public class Employee

{

public string Name { get; }

}

public class EmployeeViewState

{

public bool ColumnNameReadOnly = true;

}

In my main viewmodel I have the following:

public class ViewModel

{

public ObservableCollection<EmployeeViewModel> Employees { get; set; }

}

Now I want to bind my view to this collection, I have the following XAML:

<telerik:RadGridView x:Name="grid" MinHeight="400"

DataContext="{Binding}"

ItemsSource="{Binding Employees}">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="Name:"

DataMemberBinding="{Binding Path=EmployeeData.Name}"

Width="215"

IsReadOnly="{Binding Path=ViewState.ColumnNameReadOnly}"/>

</telerik:RadGridView.Columns>

</telerik:RadGridView>

The Name property of the EmployeeData object is correctly bind to the current item of the row, but the IsReadOnly property binding is looking for a ViewState object in my main viewmodel!

How can I set the datacontext for this property the same as with the DataMemberBinding?

Regards,

Marcel

GridView

answered on 10 Aug 2016

3 answers

180 views

RadDiagramTextShape - the same font size in edit and normal mode

Hello,

I having problem with RadDiagramTextShape font size when it is editing. I need to RadDiagramTextShape font size in edit mode is equal to font size in normal state. I don't see any relationship between the font size in normal mode and edit mode (see attach file). I think currently font size is fixed value in edit mode.

How I can binding/set size font in edit mode to equal in normal mode?

Thanks you

Adam

Diagram