RadComboBox inside DropDownContent error

[Marjeta Segrec]

Hello.

Controls info: Telerik controls version for Silverlight 4 2010.1.0416 in VS 2010.

If put RadComboBox inside RadRibbonDropDownButton.DropDownContent and after click/select in ComboBoxItem application crash - but if put MS ComboBox or C1.ComboBox inside RadRibbonDropDownButton.DropDownContent  application work normal.

error :
Microsoft JScript runtime error: Unhandled Error in Silverlight Application
Code: 4004   
Category: ManagedRuntimeError      
Message: System.ArgumentException: Value does not fall within the expected range.
   v MS.Internal.XcpImports.MethodEx(IntPtr ptr, String name, CValue[] cvData)
   v MS.Internal.XcpImports.MethodPack(IntPtr objectPtr, String methodName, Object[] rawData)
   v MS.Internal.XcpImports.UIElement_TransformToVisual(UIElement element, UIElement visual)
   v System.Windows.UIElement.TransformToVisual(UIElement visual)
   v Telerik.Windows.Controls.RadComboBoxItem.BringIntoView()
   v Telerik.Windows.Controls.RadComboBox.ScrollIntoView(Object item)
   v Telerik.Windows.Controls.RadComboBox.NavigateToItem(Object item)
   v Telerik.Windows.Controls.RadComboBox.OnSelectionChanged(SelectionChangedEventArgs e)
   v Telerik.Windows.Controls.RadComboBox.SelectItemDelayedSelectionChanged(Object item)
   v Telerik.Windows.Controls.RadComboBox.NotifyComboBoxItemMouseUp(RadComboBoxItem comboBoxItem)
   v Telerik.Windows.Controls.RadComboBoxItem.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   v System.Windows.Controls.Control.OnMouseLeftButtonUp(Control ctrl, EventArgs e)
   v MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, String eventName)

I am prepared the simple sample for you where can you reproduce that:

<UserControl x:Class="SLRadComboBox.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    xmlns:telerikRibbon="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.RibbonBar"
    d:DesignHeight="300" d:DesignWidth="400">

    <Grid x:Name="LayoutRoot" Background="White">
        <Grid.RowDefinitions >
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <Border Margin="30" Padding="10" CornerRadius="6" BorderThickness="1" BorderBrush="Gray" Background="Cyan" >
            <StackPanel Orientation="Horizontal"  HorizontalAlignment="Center"  >
                <telerikRibbon:RadRibbonDropDownButton x:Name="DropDownButton1" Margin="4" Text="DropDown With RadRibbonComboBox" >
                </telerikRibbon:RadRibbonDropDownButton>
                <telerikRibbon:RadRibbonDropDownButton x:Name="DropDownButton2" Margin="4" Text="DropDown With MS ComboBox" >
                </telerikRibbon:RadRibbonDropDownButton>
            </StackPanel>
        </Border>
    </Grid>
</UserControl>

Option Strict On

#Region " Imports ----------------------------------------------------------------------- "
Imports System.Collections
Imports System.Collections.Generic
Imports System.Collections.ObjectModel
Imports System.Collections.Specialized
Imports System.Linq
Imports System.Windows
Imports System.Windows.Data
Imports System.Windows.Media
Imports System.Windows.Resources
Imports Telerik.Windows.Controls

#End Region ' Imports

Partial Public Class MainPage
    Inherits UserControl

    Public Sub New()
        InitializeComponent()
        '
        If System.ComponentModel.DesignerProperties.GetIsInDesignMode(Me) Then
            Return
        End If ' System.ComponentModel.DesignerProperties.GetIsInDesignMode(Me)
        '
        Me.BuildDropDownContent()
    End Sub

    Private Sub BuildDropDownContent()
        Dim sp1 As New StackPanel With {.Orientation = Orientation.Vertical}
        Dim sp2 As New StackPanel With {.Orientation = Orientation.Vertical}
        Dim source() As String = New String() { _
            "RadContextMenu", "StackPanel", "RadRibbonComboBox", "UserControl"}

        For a As Integer = 1 To 3
            Dim cmb1 As New RadRibbonComboBox With { _
                .ItemsSource = source, .Margin = New Thickness(2), .Width = 140}
            sp1.Children.Add(cmb1)
            '
            Dim cmb2 As New ComboBox With { _
                .ItemsSource = source, .Margin = New Thickness(2), .Width = 140}
            sp2.Children.Add(cmb2)
        Next
        '
        Me.DropDownButton1.DropDownContent = sp1
        Me.DropDownButton2.DropDownContent = sp2

    End Sub ' BuildDropDownContent

End Class ' MainPage

Thanks for your answer.
Regards,

[Valeri Hristov]

Hi Marjeta,

Thank you for the sample code, it helped to reproduce the problem. We will need some time to find what's the cause, I will write back here again when I have more information.

Best wishes,
Valeri Hristov
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[Valeri Hristov]

Hi Marjeta,

This problem is caused by the RadRibbonDropDownButton's autoclose behavior - it listens for a SelectionChanged event and when such is raised, it closes its dropdown. In your case, when RadComboBox changes its selection, the DropDownButton closes its dropdown, but RadComboBox tries to scroll itself, so the newly selected item is visible and fails with the exception you are seeing.

To workaround the problem we would recommend setting the KeepOpen property on RadRibbonDropDownButton to true:
<ribbon:RadRibbonDropDownButton KeepOpen="True" ...

Kind regards,
Valeri Hristov
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.