TreeView Control Assembly Error

[Noushad]

I get the following error at runtime
Cannot find type 'Telerik.Windows.Controls.RadTreeView'. The assembly used when compiling might be different than that used when loading and the type is missing.  Error at object 'System.Windows.Controls.Grid' in markup file

I am using the following Telerik dlls which I have added to my project references
Telerik.Windows.Controls - 2010.3.1110.35
Telerik.Windows.Controls.Data - 2010.3.1110.35
Telerik.Windows.Controls.Navigation - 2010.3.1110.35

Format Code Block(

 

 

<

 

UserControl x:Class="AOS.UI.Windows.Controls.Widget.acWidgets"

 

 

 

 

 

 

 

 

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

 

 

 

 

 

 

 

 

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

 

 

 

xmlns:VMCommanding="clr-namespace:VMCommanding"

 

 

 

 

 

 

 

 

xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

 

 

 

xmlns:vm="clr-namespace:AOS.UI.Windows.Controls.Widget.ViewModel"

 

 

 

 

 

 

 

 

Height="300" Width="300"

 

 

 

xmlns:Core="clr-namespace:AOS.UI.Windows.Controls.Core;assembly=AOS.UI.Windows.Controls.Core"

 

 

 

 

 

 

 

 

VMCommanding:CommandSinkBinding.CommandSink="{Binding}">

 

 

 

 

 

 

<UserControl.CommandBindings>

 

 

 

 

 

 

 

 

 

<VMCommanding:CommandSinkBinding Command="vm:WidgetViewModel.NavigateItemCommand" />

 

 

 

 

 

 

 

 

 

</UserControl.CommandBindings>

 

 

 

 

 

 

 

 

 

 

 

<UserControl.Resources>

 

 

 

 

 

 

 

 

 

<HierarchicalDataTemplate x:Key="NavigationTemplate"

 

 

 

ItemsSource="{Binding Path=WidgetList}">

 

 

 

 

 

 

 

 

 

<Grid Margin="1">

 

 

 

 

 

 

 

 

 

<Grid.ColumnDefinitions>

 

 

 

 

 

 

 

 

 

<ColumnDefinition Width="16" />

 

 

 

 

 

 

 

 

 

<ColumnDefinition Width="*" />

 

 

 

 

 

 

 

 

 

</Grid.ColumnDefinitions>

 

 

 

 

 

 

 

 

 

<Image Grid.Column="0" Source="{Binding Path=Icon_Name}"></Image>

 

 

 

 

 

 

 

 

 

<Core:CommandTextBlock Grid.Column="1" Margin="1"

 

 

 

Text="{Binding Path=Description}"

 

 

 

 

 

 

 

 

Command="vm:WidgetViewModel.NavigateItemCommand"

 

 

 

CommandParameter="{Binding}"/>

 

 

 

 

 

 

 

 

 

 

 

</Grid>

 

 

 

 

 

 

 

 

 

</HierarchicalDataTemplate>

 

 

 

 

 

 

 

 

 

</UserControl.Resources>

 

 

 

 

 

 

 

 

 

<Grid>

 

 

 

 

 

 

 

 

 

<Grid.RowDefinitions>

 

 

 

 

 

 

 

 

 

<RowDefinition Height="55" />

 

 

 

 

 

 

 

 

 

<RowDefinition Height="*" />

 

 

 

 

 

 

 

 

 

<RowDefinition Height="30" />

 

 

 

 

 

 

 

 

 

</Grid.RowDefinitions>

 

 

 

 

 

 

 

 

 

 

 

<telerik:RadTreeView Grid.Row="2" ItemsSource="{Binding WidgetList}" ItemTemplate="{StaticResource NavigationTemplate}" />

 

 

 

 

 

 

 

 

 

 

 

</Grid>

 

 

 

 

 

 

 

</

 

UserControl>

 

)

[Petar Mladenov]

Hello Noushad,

We are unable to reproduce this issue in our environment. Could you please try to clean and rebuild you application, make sure that the target framework is 3.5? If the problem still exist, it would be better if you can send us a runnable sample so that we could investigate in depth and advice you better. thank you for your cooperation.

Kind regards,
Petar Mladenov
the Telerik team

[Noushad]

Hi

It seems that the issue is not exclusive to the Telerik controls alone.  I have built a test solution with test projects and the Telerik Tree view control seems to work fine.  However I noticed that other enhanced controls that we have built also give a very similar error "The assembly used when compiling might be different than that used when loading and the type is missing"

I may send you guys some sample code if I'm still struggling to get it to work.  I have also noticed that when I try and view the properties of the project, the entire solution closes down.  This only happens with specific projects.  I am running VS 2008 SP1.

Thanks for your help.

[Petar Mladenov]

Hi Noushad,

We are looking forward to receiving a project from you reproducing this strange issue.This will be the best way to continue our investigation. Thank you for your cooperation.

Best wishes,
Petar Mladenov
the Telerik team