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[Solved] Unable to get items for a combobox inside EditAppointmentTemplate

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ScheduleView

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Maxence asked on 21 Sep 2011, 05:24 AM

Hi,

i have a custom appointment and i'm not able to bind a combobox inside the EditAppointmentDialog.
I saw already a topic there about this problem : http://www.telerik.com/community/forums/silverlight/scheduleview/add-combobox-in-appointmentdialog.aspx but it doesn't work for me.

Here the xaml for my silverlight page :

<navigation:Page xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" x:Class="FrontOffice.Silverlight.Saisie_Recurrente"

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:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"

d:DesignWidth="640" d:DesignHeight="480"

x:Name="PageSaisieRecurrente"

Title="Saisie_Recurrente Page">

<navigation:Page.Resources>

<SolidColorBrush x:Key="RadScheduleForeground" Color="Black"/>

<SolidColorBrush x:Key="RadScheduleBackground" Color="#FFFFFFFF"/>

<telerik:Office_SilverTheme x:Key="Theme"/>

<telerik:InvertedBooleanConverter x:Key="InvertedBooleanConverter"/>

<DataTemplate x:Key="TimeMarkerComboBoxItemContentTemplate">

<StackPanel Orientation="Horizontal">

<Rectangle Fill="{Binding TimeMarkerBrush}" Height="12" Margin="2 0" Width="12"/>

<TextBlock Margin="2 0" telerik:LocalizationManager.ResourceKey="{Binding TimeMarkerName}"/>

</StackPanel>

</DataTemplate>

<DataTemplate x:Key="CategoryComboBoxItemContentTemplate">

<StackPanel Orientation="Horizontal">

<Rectangle Fill="{Binding CategoryBrush}" Height="12" Margin="2 0" Width="12"/>

<TextBlock Margin="2 0" Text="{Binding DisplayName}"/>

</StackPanel>

</DataTemplate>

<telerik:LocalizationManager x:Key="LocalizationManager"/>

<telerik:BoolToInputModeConverter x:Key="BoolToInputModeConverter"/>

<telerik:ResourcesSeparatorConverter x:Key="ResourcesSeparatorConverter"/>

<telerik:ResourceTypeTemplateSelector x:Key="ResourcesEditorItemTemplateSelector">

<telerik:ResourceTypeTemplateSelector.MultipleSelectionTemplate>

<DataTemplate>

<Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="120"/>

<ColumnDefinition Width="*"/>

</Grid.ColumnDefinitions>

<TextBlock Margin="6" Text="{Binding ResourceType.DisplayName}"/>

<telerik:RadComboBox ClearSelectionButtonContent="{Binding ClearAllButtonContent}" Grid.Column="1" ClearSelectionButtonVisibility="Visible" ItemsSource="{Binding ResourceItems}" Margin="3" SelectedIndex="{Binding SelectedIndex, Mode=TwoWay}" telerik:StyleManager.Theme="{StaticResource Theme}">

<telerik:RadComboBox.ItemContainerStyle>

<Style TargetType="telerik:RadComboBoxItem">

<Setter Property="Template">

<Setter.Value>

<ControlTemplate>

<CheckBox Content="{Binding Resource.DisplayName}" IsChecked="{Binding IsChecked, Mode=TwoWay}" telerik:StyleManager.Theme="{StaticResource Theme}"/>

</ControlTemplate>

</Setter.Value>

</Setter>

</Style>

</telerik:RadComboBox.ItemContainerStyle>

<telerik:RadComboBox.SelectionBoxTemplate>

<DataTemplate>

<TextBlock Text="{Binding Owner.CheckedItems, Converter={StaticResource ResourcesSeparatorConverter}}"/>

</DataTemplate>

</telerik:RadComboBox.SelectionBoxTemplate>

</telerik:RadComboBox>

</Grid>

</DataTemplate>

</telerik:ResourceTypeTemplateSelector.MultipleSelectionTemplate>

<telerik:ResourceTypeTemplateSelector.SingleSelectionTemplate>

<DataTemplate>

<Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="120"/>

<ColumnDefinition Width="*"/>

</Grid.ColumnDefinitions>

<TextBlock Margin="6" Text="{Binding ResourceType.DisplayName}"/>

<telerik:RadComboBox ClearSelectionButtonContent="{Binding ClearAllButtonContent}" Grid.Column="1" ClearSelectionButtonVisibility="Visible" DisplayMemberPath="Resource.DisplayName" ItemsSource="{Binding ResourceItems}" Margin="3" SelectedItem="{Binding SelectedItem, Mode=TwoWay}" telerik:StyleManager.Theme="{StaticResource Theme}"/>

</Grid>

</DataTemplate>

</telerik:ResourceTypeTemplateSelector.SingleSelectionTemplate>

</telerik:ResourceTypeTemplateSelector>

<telerik:InvertedVisibilityConverter x:Key="InvertedVisibilityConverter"/>

<telerik:InvertedBooleanToVisibilityConverter x:Key="InvertedBooleanToVisibilityConverter"/>

<telerik:BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>

<telerik:NullToVisibilityConverter x:Key="NullToVisibilityConverter"/>

<telerik:InvertedNullToVisibilityConverter x:Key="InvertedNullToVisibilityConverter"/>

<ImageSource x:Key="EditAppointmentTemplate_Recurrence">/Telerik.Windows.Controls.ScheduleView;component/Themes/Images/Recurrence.png</ImageSource>

<ControlTemplate x:Key="EditAppointmentTemplate" TargetType="telerik:SchedulerDialog">

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="Auto"/>

<RowDefinition Height="*"/>

<RowDefinition Height="Auto"/>

</Grid.RowDefinitions>

<telerik:RadToolBar x:Name="AppointmentToolbar" GripVisibility="Collapsed" Margin="-1 -1 -1 3" Grid.Row="0" telerik:StyleManager.Theme="{StaticResource Theme}">

<telerik:RadButton x:Name="EditRecurrenceButton" Command="telerik:RadScheduleViewCommands.EditRecurrenceRule" Visibility="{Binding CanEditParentAppointment, Converter={StaticResource InvertedBooleanToVisibilityConverter}}">

<ToolTipService.ToolTip>

<ToolTip telerik:LocalizationManager.ResourceKey="EditRecurrence" telerik:StyleManager.Theme="{StaticResource Theme}"/>

</ToolTipService.ToolTip>

<StackPanel Margin="2 0" Orientation="Horizontal">

<Image Margin="2 0" Source="{StaticResource EditAppointmentTemplate_Recurrence}" Stretch="None"/>

<TextBlock Foreground="{StaticResource RadScheduleForeground}" Margin="4 0" telerik:LocalizationManager.ResourceKey="EditRecurrence"/>

</StackPanel>

</telerik:RadButton>

<telerik:RadButton x:Name="EditParentAppointmentButton" Command="telerik:RadScheduleViewCommands.EditParentAppointment" IsEnabled="{Binding IsReadOnly, Converter={StaticResource InvertedBooleanConverter}}" Visibility="{Binding CanEditParentAppointment, Converter={StaticResource BooleanToVisibilityConverter}}">

<ToolTipService.ToolTip>

<TextBlock telerik:LocalizationManager.ResourceKey="EditParentAppointment" telerik:StyleManager.Theme="{StaticResource Theme}"/>

</ToolTipService.ToolTip>

<TextBlock Foreground="{StaticResource RadScheduleForeground}" Margin="4 0" telerik:LocalizationManager.ResourceKey="EditParentAppointment"/>

</telerik:RadButton>

<telerik:RadToolBarSeparator/>

<TextBlock x:Name="ShowAs" Foreground="{StaticResource RadScheduleForeground}" Margin="1 0 1 1" telerik:LocalizationManager.ResourceKey="ShowAs" VerticalAlignment="Center"/>

<telerik:RadComboBox x:Name="PART_TimeMarkers" ClearSelectionButtonContent="{Binding ClearSelectionButtonContent}" ClearSelectionButtonVisibility="Visible" EmptyText="{Binding TimeMarkersEmptyText}" ItemTemplate="{StaticResource TimeMarkerComboBoxItemContentTemplate}" ItemsSource="{Binding TimeMarkers}" IsEnabled="{Binding IsReadOnly, Converter={StaticResource InvertedBooleanConverter}}" Margin="2 1" SelectionBoxTemplate="{StaticResource TimeMarkerComboBoxItemContentTemplate}" SelectedItem="{Binding Occurrence.Appointment.TimeMarker, Mode=TwoWay}" telerik:StyleManager.Theme="{StaticResource Theme}" Width="110"/>

<telerik:RadComboBox x:Name="PART_Categories" ClearSelectionButtonContent="{Binding ClearSelectionButtonContent}" ClearSelectionButtonVisibility="Visible" EmptyText="{Binding CategoriesEmptyText}" ItemTemplate="{StaticResource CategoryComboBoxItemContentTemplate}" ItemsSource="{Binding Categories}" IsEnabled="{Binding IsReadOnly, Converter={StaticResource InvertedBooleanConverter}}" Margin="2 1" SelectionBoxTemplate="{StaticResource CategoryComboBoxItemContentTemplate}" SelectedItem="{Binding Occurrence.Appointment.Category, Mode=TwoWay}" telerik:StyleManager.Theme="{StaticResource Theme}" Width="120"/>

<telerik:RadToggleButton x:Name="HighImportaceButton" Height="22" IsChecked="{Binding IsHighImportance, Mode=TwoWay}" IsEnabled="{Binding IsReadOnly, Converter={StaticResource InvertedBooleanConverter}}" Width="22">

<ToolTipService.ToolTip>

<ToolTip telerik:LocalizationManager.ResourceKey="HighImportance" telerik:StyleManager.Theme="{StaticResource Theme}"/>

</ToolTipService.ToolTip>

<StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">

<Path Data=

"M200.39647,58.840393 C200.39337,58.336426 201.14566,57.683922 202.56244,57.684292 C204.06589,57.684685 204.73764,58.357765 204.72783,58.992363 C205.04649,61.795574 203.04713,64.181099 202.47388,66.133446 C201.93753,64.154961 199.9471,61.560352 200.39647,58.840393 z"

HorizontalAlignment="Center" Height="10" Stretch="Fill" Width="5.451">

<Path.Fill>

<LinearGradientBrush EndPoint="1.059,0.375" StartPoint="-0.457,0.519">

<GradientStop Color="#FFFF0606" Offset="0.609"/>

<GradientStop Color="#FFBF0303" Offset="0.927"/>

</LinearGradientBrush>

</Path.Fill>

</Path>

<Ellipse HorizontalAlignment="Center" Height="3" Width="3">

<Ellipse.Fill>

<RadialGradientBrush>

<GradientStop Color="#FFFF0606" Offset="0"/>

<GradientStop Color="#FFBF0303" Offset="1"/>

</RadialGradientBrush>

</Ellipse.Fill>

</Ellipse>

</StackPanel>

</telerik:RadToggleButton>

<telerik:RadToggleButton x:Name="LowImportaceButton" Height="22" IsChecked="{Binding IsLowImportance, Mode=TwoWay}" IsEnabled="{Binding IsReadOnly, Converter={StaticResource InvertedBooleanConverter}}" Width="22">

<ToolTipService.ToolTip>

<ToolTip telerik:LocalizationManager.ResourceKey="LowImportance" telerik:StyleManager.Theme="{StaticResource Theme}"/>

</ToolTipService.ToolTip>

<Path Data=

"M222.40353,60.139881 L226.65768,60.139843 L226.63687,67.240196 L229.15347,67.240196 L224.37816,71.394943 L219.65274,67.240196 L222.37572,67.219345 z"

HorizontalAlignment="Center" Height="12" Stretch="Fill" Stroke="#FF0365A7" VerticalAlignment="Center" Width="9">

<Path.Fill>

<LinearGradientBrush EndPoint="1.059,0.375" StartPoint="-0.457,0.519">

<GradientStop Color="#FFBBE4FF"/>

<GradientStop Color="#FF024572" Offset="0.836"/>

<GradientStop Color="#FF43ADF4" Offset="0.466"/>

</LinearGradientBrush>

</Path.Fill>

</Path>

</telerik:RadToggleButton>

</telerik:RadToolBar>

<Border x:Name="AppointmentCategory" Background="{Binding SelectedItem.CategoryBrush, ElementName=PART_Categories}" CornerRadius="3" Height="20" Margin="6 6" Grid.Row="1" Visibility="{Binding SelectedItem, Converter={StaticResource NullToVisibilityConverter}, ElementName=PART_Categories}">

<TextBlock Margin="6 0" Text="{Binding SelectedItem.DisplayName, ElementName=PART_Categories}" VerticalAlignment="Center"/>

</Border>

<Grid x:Name="Details" Margin="6" Grid.Row="2">

<Grid.Resources>

<telerik:InputMode x:Key="RadDateTimePickerInputModeDatePicker">DatePicker</telerik:InputMode>

</Grid.Resources>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="120"/>

<ColumnDefinition Width="*"/>

</Grid.ColumnDefinitions>

<Grid.RowDefinitions>

<RowDefinition Height="Auto"/>

<RowDefinition Height="*"/>

<RowDefinition Height="Auto"/>

</Grid.RowDefinitions>

<TextBlock Grid.Column="0" Margin="6" Grid.Row="0" telerik:LocalizationManager.ResourceKey="Subject"/>

<TextBox Grid.ColumnSpan="2" Grid.Column="1" IsReadOnly="{Binding IsReadOnly}" Margin="3" Grid.Row="0" Text="{Binding Occurrence.Appointment.Subject, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnDataErrors=True}" telerik:StyleManager.Theme="{StaticResource Theme}"/>

<TextBlock Grid.Column="0" Margin="6" Grid.Row="1" telerik:LocalizationManager.ResourceKey="Body"/>

<TextBox Grid.ColumnSpan="2" Grid.Column="1" Height="70" IsReadOnly="{Binding IsReadOnly}" Margin="3" Grid.Row="1" TextWrapping="Wrap" Text="{Binding Occurrence.Appointment.Body, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnDataErrors=True}" telerik:StyleManager.Theme="{StaticResource Theme}" VerticalScrollBarVisibility="Visible" VerticalAlignment="Stretch" VerticalContentAlignment="Stretch"/>

<TextBlock Grid.Column="0" Margin="6" Grid.Row="2" telerik:LocalizationManager.ResourceKey="StartTime"/>

<telerik:RadDateTimePicker Culture="{Binding DefaultCulture, Source={StaticResource LocalizationManager}}" Grid.Column="1" IsReadOnly="{Binding IsReadOnly}" IsEnabled="{Binding IsNotRecurrent}" Margin="3" Grid.Row="2" SelectedValue="{Binding ActualStart, Mode=TwoWay, NotifyOnValidationError=true, ValidatesOnDataErrors=true}" telerik:StyleManager.Theme="{StaticResource Theme}">

<telerik:RadDateTimePicker.InputMode>

<Binding Converter="{StaticResource BoolToInputModeConverter}" Path="IsAllDayEvent">

<Binding.ConverterParameter>

<telerik:InputMode>DatePicker</telerik:InputMode>

</Binding.ConverterParameter>

</Binding>

</telerik:RadDateTimePicker.InputMode>

</telerik:RadDateTimePicker>

<TextBlock Grid.Column="0" Margin="6" Grid.Row="3" telerik:LocalizationManager.ResourceKey="EndTime" telerik:StyleManager.Theme="{StaticResource Theme}" VerticalAlignment="Center"/>

<telerik:RadDateTimePicker Culture="{Binding DefaultCulture, Source={StaticResource LocalizationManager}}" Grid.Column="1" IsReadOnly="{Binding IsReadOnly}" IsEnabled="{Binding IsNotRecurrent}" Margin="3" Grid.Row="3" SelectedValue="{Binding ActualEnd, Mode=TwoWay, NotifyOnValidationError=true, ValidatesOnDataErrors=true}" telerik:StyleManager.Theme="{StaticResource Theme}">

<telerik:RadDateTimePicker.InputMode>

<Binding Converter="{StaticResource BoolToInputModeConverter}" Path="IsAllDayEvent">

<Binding.ConverterParameter>

<telerik:InputMode>DatePicker</telerik:InputMode>

</Binding.ConverterParameter>

</Binding>

</telerik:RadDateTimePicker.InputMode>

</telerik:RadDateTimePicker>

<CheckBox Grid.Row="9" Grid.Column="1" Margin="3" Content="Reunion ?" IsChecked="{Binding Occurrence.Appointment.IsMeeting, Mode=TwoWay}"/>

<CheckBox Grid.Row="6" Grid.Column="1" Margin="3" Content="Heure supplémentaire ?" IsChecked="{Binding Occurrence.Appointment.IsAdditionalHour, Mode=TwoWay}"/>

<TextBlock Grid.Column="0" Margin="6" Grid.Row="7" Text="Métier" />

<TextBox Grid.ColumnSpan="2" Grid.Column="1" IsReadOnly="{Binding IsReadOnly}" Margin="3" Grid.Row="7" Text="{Binding Occurrence.Appointment.Occupation, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnDataErrors=True}" telerik:StyleManager.Theme="{StaticResource Theme}"/>

<TextBlock Grid.Column="0" Margin="6" Grid.Row="8" Text="Type"/>

<TextBox Grid.ColumnSpan="2" Grid.Column="1" IsReadOnly="{Binding IsReadOnly}" Margin="3" Grid.Row="8" Text="{Binding Occurrence.Appointment.Type, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnDataErrors=True}" telerik:StyleManager.Theme="{StaticResource Theme}"/>

<telerik:RadComboBox x:Name="cmbProjects" Grid.Row="5" Grid.Column="1" ItemsSource="{Binding ElementName=RecurrentScheduleView, Path=DataContext.Projets, Mode=TwoWay}" SelectedValue="{Binding Path=Occurrence.Appointment.Project, Mode=TwoWay}" DisplayMemberPath="Libelle" Margin="2 1" DropDownOpened="cmbProjects_DropDownOpened" />

</Grid>

<Grid Margin="3" Grid.Row="3" Visibility="{Binding ResourceTypesVisibility}">

<telerik:ItemsControl x:Name="PART_Resources" BorderBrush="{x:Null}" BorderThickness="0" HorizontalContentAlignment="Stretch" IsTabStop="false" ItemsSource="{Binding ResourceTypes}" ItemTemplateSelector="{StaticResource ResourcesEditorItemTemplateSelector}" IsEnabled="{Binding IsReadOnly, Converter={StaticResource InvertedBooleanConverter}}" Margin="3" Visibility="{Binding ResourceTypesVisibility}" VerticalContentAlignment="Stretch"/>

<TextBlock HorizontalAlignment="Center" Margin="3" Text="You can only change the resources by opening the series" Visibility="{Binding ResourceTypesVisibility, Converter={StaticResource InvertedVisibilityConverter}}"/>

</Grid>

<StackPanel HorizontalAlignment="Right" Margin="13 6" Orientation="Horizontal" Grid.Row="4">

<telerik:RadButton Command="telerik:WindowCommands.Confirm" Margin="2" MinWidth="84" telerik:LocalizationManager.ResourceKey="Ok" telerik:RadWindow.ResponseButton="Accept" telerik:StyleManager.Theme="{StaticResource Theme}">

<ToolTipService.ToolTip>

<TextBlock telerik:LocalizationManager.ResourceKey="SaveAndClose" telerik:StyleManager.Theme="{StaticResource Theme}"/>

</ToolTipService.ToolTip>

</telerik:RadButton>

<telerik:RadButton Command="telerik:WindowCommands.Cancel" Margin="2" MinWidth="84" telerik:LocalizationManager.ResourceKey="Cancel" telerik:RadWindow.ResponseButton="Cancel" telerik:StyleManager.Theme="{StaticResource Theme}"/>

</StackPanel>

</Grid>

</ControlTemplate>

<Style x:Key="EditAppointmentDialogStyle" TargetType="telerik:SchedulerDialog">

<Setter Property="Foreground" Value="{StaticResource RadScheduleBackground}"/>

<Setter Property="Width" Value="560"/>

<Setter Property="IsTabStop" Value="False"/>

<Setter Property="Template" Value="{StaticResource EditAppointmentTemplate}"/>

<Setter Property="HeaderTemplate">

<Setter.Value>

<DataTemplate>

<StackPanel HorizontalAlignment="Left" MaxWidth="400" Orientation="Horizontal">

<TextBlock telerik:LocalizationManager.ResourceKey="Event" Visibility="{Binding Occurrence.Appointment.IsAllDayEvent, Converter={StaticResource BooleanToVisibilityConverter}}"/>

<TextBlock telerik:LocalizationManager.ResourceKey="Appointment" Visibility="{Binding Occurrence.Appointment.IsAllDayEvent, Converter={StaticResource InvertedBooleanToVisibilityConverter}}"/>

<TextBlock Text=" - "/>

<TextBlock x:Name="SubjectTextBlock" Text="{Binding Occurrence.Appointment.Subject}" Visibility="{Binding Occurrence.Appointment.Subject, Converter={StaticResource NullToVisibilityConverter}}"/>

<TextBlock telerik:LocalizationManager.ResourceKey="Untitled" Visibility="{Binding Occurrence.Appointment.Subject, Converter={StaticResource InvertedNullToVisibilityConverter}}"/>

</StackPanel>

</DataTemplate>

</Setter.Value>

</Setter>

<Setter Property="IconTemplate">

<Setter.Value>

<DataTemplate>

<Image Source="/Telerik.Windows.Controls.ScheduleView;component/Themes/Images/EditAppointment.png" Stretch="None"/>

</DataTemplate>

</Setter.Value>

</Setter>

</Style>

</navigation:Page.Resources>

<Grid x:Name="LayoutRoot">

<StackPanel Orientation="Vertical">

<telerik:RadComboBox x:Name="cmbProjects2" ItemsSource="{Binding ElementName=RecurrentScheduleView, Path=DataContext.Projets, Mode=TwoWay}" DisplayMemberPath="Libelle" Margin="2 1" />

<telerik:RadScheduleView x:Name="RecurrentScheduleView" AppointmentsSource="{Binding Imputations, Mode=TwoWay}" EditAppointmentDialogStyle="{StaticResource EditAppointmentDialogStyle}" AppointmentCreated="RadScheduleView_ImputationCreated" AppointmentDeleted="RadScheduleView_ImputationDeleted" AppointmentEdited="RadScheduleView_ImputationEdited" DataContext="{Binding}">

<telerik:RadScheduleView.ViewDefinitions>

<telerik:DayViewDefinition />

<telerik:WeekViewDefinition />

<telerik:MonthViewDefinition/>

<telerik:TimelineViewDefinition />

</telerik:RadScheduleView.ViewDefinitions>

</telerik:RadScheduleView>

</StackPanel>

</Grid>

</navigation:Page>

Note that it doesn't work for the combobox inside the EditAppointmentdialog : cmbProjects
but it works with the same binding formula

ItemsSource="{Binding ElementName=RecurrentScheduleView, Path=DataContext.Projets, Mode=TwoWay}"

if the combobox is outside the RadScheduleView : cmbProjects2

thanks by advance !

2 Answers, 1 is accepted

Accepted

answered on 22 Sep 2011, 01:02 PM

Hello Maxence,

The first way to resolve this is to bind your RadComboBox directly to the ViewModel:

<telerik:RadComboBox x:Name="cmbProjects" ItemsSource="{Binding Source={StaticResource ViewModel}, Path=Projets, Mode=TwoWay}"/>

As I can see your page is inheriting its DataContext. If you cannot access your ViewMiodel I would suggest you a workaround. You can attach to the Loaded event of your RadComboBox and load its items there:

private void cmbProjects_Loaded(object sender, RoutedEventArgs e)

{

var viewModel = (ViewModel)this.RecurrentScheduleView.DataContext;

var radComboBox = (RadComboBox)sender;

radComboBox.Items.AddRange(viewModel.Projets);

}

Hope this helps.

Regards,
Ivo
the Telerik team

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