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RadTreeView with columns error
Hello, I'm using your RadTreeView with Columns example and a few days ago, I started getting these two strange exceptions, they seem to be in the RadTreeViewItem code, so I can't trace them.

Error 1) When I call the Clear() event from the RadTreeView

Message:

"Object reference not set to an instance of an object."

Stack trace:

   at Telerik.Windows.Controls.RadTreeViewItem.HandleSingleClickFunctionality() in c:\Builds\WPF_Scrum\Navigation_WPF\Sources\Development\Controls\Navigation\TreeView\RadTreeViewItem.Events.cs:line 439
   at Telerik.Windows.Controls.RadTreeViewItem.OnHeaderMouseLeftButtonUp(Object sender, MouseEventArgs e) in c:\Builds\WPF_Scrum\Navigation_WPF\Sources\Development\Controls\Navigation\TreeView\RadTreeViewItem.Events.cs:line 863
   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
   at System.Windows.UIElement.CrackMouseButtonEventAndReRaiseEvent(DependencyObject sender, MouseButtonEventArgs e)
   at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
   at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)

Error 2) When I click on a RadTreeViewItem to select it.

Message:

"The specified Visual and this Visual do not share a common ancestor, so there is no valid transformation between the two Visuals."

Stack Trace:

"   at System.Windows.Media.Visual.TransformToVisual(Visual visual)\r\n   at Telerik.Windows.Controls.RadTreeViewItem.get_IsInViewport() in c:\\Builds\\WPF_Scrum\\Navigation_WPF\\Sources\\Development\\Controls\\Navigation\\TreeView\\RadTreeViewItem.Properties.cs:line 434\r\n   at Telerik.Windows.Controls.RadTreeViewItem.BringIntoView() in c:\\Builds\\WPF_Scrum\\Navigation_WPF\\Sources\\Development\\Controls\\Navigation\\TreeView\\RadTreeViewItem.cs:line 341\r\n   at Telerik.Windows.Controls.RadTreeViewItem.OnIsSelectedPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs args) in c:\\Builds\\WPF_Scrum\\Navigation_WPF\\Sources\\Development\\Controls\\Navigation\\TreeView\\RadTreeViewItem.Properties.cs:line 1161\r\n   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)\r\n   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)\r\n   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)\r\n   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, OperationType operationType)\r\n   at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, OperationType operationType, Boolean isInternal)\r\n   at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)\r\n   at Telerik.Windows.Controls.RadTreeViewItem.set_IsSelected(Boolean value) in c:\\Builds\\WPF_Scrum\\Navigation_WPF\\Sources\\Development\\Controls\\Navigation\\TreeView\\RadTreeViewItem.Properties.cs:line 417\r\n   at Telerik.Windows.Controls.RadTreeView.SelectionChanger_SelectionChanged(Object sender, SelectionChangedEventArgs e) in c:\\Builds\\WPF_Scrum\\Navigation_WPF\\Sources\\Development\\Controls\\Navigation\\TreeView\\RadTreeView.cs:line 2735\r\n   at Telerik.Windows.Controls.SelectionChanger`1.InvokeSelectionChangedEvent() in c:\\Builds\\WPF_Scrum\\Core_WPF\\Sources\\Development\\Core\\Controls\\Common\\SelectionChanger.cs:line 322\r\n   at Telerik.Windows.Controls.SelectionChanger`1.End() in c:\\Builds\\WPF_Scrum\\Core_WPF\\Sources\\Development\\Core\\Controls\\Common\\SelectionChanger.cs:line 74\r\n   at Telerik.Windows.Controls.RadTreeView.SetSelectedItem(RadTreeViewItem itemContainer) in c:\\Builds\\WPF_Scrum\\Navigation_WPF\\Sources\\Development\\Controls\\Navigation\\TreeView\\RadTreeView.cs:line 2687\r\n   at Telerik.Windows.Controls.RadTreeView.HandleItemSelectionFromUI(RadTreeViewItem itemToSelect) in c:\\Builds\\WPF_Scrum\\Navigation_WPF\\Sources\\Development\\Controls\\Navigation\\TreeView\\RadTreeView.cs:line 2133\r\n   at Telerik.Windows.Controls.RadTreeViewItem.OnHeaderMouseLeftButtonDown(Object sender, MouseButtonEventArgs e) in c:\\Builds\\WPF_Scrum\\Navigation_WPF\\Sources\\Development\\Controls\\Navigation\\TreeView\\RadTreeViewItem.Events.cs:line 846\r\n   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)\r\n   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)\r\n   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)\r\n   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)\r\n   at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)\r\n   at System.Windows.UIElement.CrackMouseButtonEventAndReRaiseEvent(DependencyObject sender, MouseButtonEventArgs e)\r\n   at System.Windows.UIElement.OnMouseDownThunk(Object sender, MouseButtonEventArgs e)\r\n   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)\r\n   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)\r\n   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)\r\n   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)\r\n   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)\r\n   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)\r\n   at System.Windows.Input.InputManager.ProcessStagingArea()\r\n   at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)\r\n   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)\r\n   at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)\r\n   at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)\r\n   at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)\r\n   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)\r\n   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)\r\n   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)\r\n   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)"

If you need more info I can show you the dissasembly. Thanks in advance.
TreeView
Miroslav
Telerik team
 answered on 05 Oct 2009
4 answers
239 views
Changing the column header at runtime
I have a WPF page with a RadGridView, and i want to change the column headers of this grid at runtime beacuse my application is bilingual, i tiried the following code but the headers dose not changed.

<

 

telerik:RadGridView Name="gvEmployees" Margin="2" telerik:StyleManager.Theme="Office_Blue" AutoGenerateColumns="False" HorizontalAlignment="Stretch" ColumnsWidthMode="Fill" ShowGroupPanel="False" IsReadOnly="True">

 

 

 

<telerik:RadGridView.Columns>

 

 

 

<telerik:GridViewDataColumn DataMemberPath="Employee_NO" Header="Employee NO."/>

 

 

 

 

<telerik:GridViewDataColumn DataMemberPath ="National_ID" Header="National ID"/>

 

 

 

<telerik:GridViewDataColumn DataMemberPath="Full_Name_Ar" Header="Name Ar"/>

 

 

 

<telerik:GridViewDataColumn DataMemberPath="Full_Name_En" Header="Name En"/>

 

 

 

 

</telerik:RadGridView.Columns>

 

 

 

</telerik:RadGridView>

 



 

Private Sub gvEmployees_DataLoaded(ByVal sender As Object, ByVal e As System.EventArgs) Handles gvEmployees.DataLoaded

 

gvEmployees.Columns(0).Header =

"Test Change"

 

 

End Sub

 

GridView
Pavel Pavlov
Telerik team
 answered on 05 Oct 2009
3 answers
49 views
Testpartner is unable to identify Telerik Tree view items.

We are using Telerik Tree control in our project. We are doing Automation by Testpartner Tool. Testpartner doesn't support directly to recognize Telerik Tree control. So we are using Telerik Tree view reference in Testpartner tool for accessing/fetching data from Tree view. By late binding unable to get tree items.
Need your suggestions forTestpartner to identify Telerik Tree view items.
TreeView
Valentin.Stoychev
Telerik team
 answered on 05 Oct 2009
1 answer
119 views
drag/drop crash, maybe a DragAndDropManager bug?
Hi

I think I found a bug involving drag/drop on the radscheduler.
The synopsis is with RadPanel and RadScheduler. I drag an item from the panel and drop it on the scheduler and build an Appointment
It's working fine in general.

But if I slowly move the drag cue on an existing Appointment, immediatly when the cursor moves on the text displayed, the DragAndDropManager crashes. It works fine if I don't display Appointment.Subject.

I was able to solve the issue by creating an appointment template like this:

 

 

<DataTemplate x:Key="AppointmentTemplate">

 

 

 

<Border>

 

 

 

<TextBlock x:Name="PART_SubjectTextBox" Text="{Binding Path=Occurrence.Appointment.Subject}"></TextBlock>

 

 

 

</Border>

 

 

 

</DataTemplate>

 


 But I can't see any reason this solves the problem.
Please find bellow the crash report provided par VS if it may help.

My system is .NET 3.5, Windows XP Pro French.
---------------------------------

System.NullReferenceException was unhandled by user code
  Message="La référence d'objet n'est pas définie à une instance d'un objet."
  Source="Telerik.Windows.Controls"
  StackTrace:
       à Telerik.Windows.Controls.DragDrop.RadDragAndDropManager.<FindDropZones>b__2(HitTestResult el) dans c:\Builds\WPF_Scrum\Core_WPF_2009_Q2_SP1\Sources\Development\Core\Controls\DragDrop\RadDragAndDropManager.cs:ligne 1148
       à System.Windows.Media.Visual.HitTestPointInternal(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters hitTestParameters)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTestPoint(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, PointHitTestParameters pointParams)
       à System.Windows.Media.Visual.HitTest(HitTestFilterCallback filterCallback, HitTestResultCallback resultCallback, HitTestParameters hitTestParameters)
  InnerException:
DragAndDrop
Miroslav
Telerik team
 answered on 05 Oct 2009
3 answers
107 views
TextBoa with aggregate function in gridViewCell
I am trying to show textbox in grid cell performing aggregate function.
These underneath Xaml show textboxes but while editing  value in textbox,textbox disappear on double-click and when done with editing it re-appear again.and aggregate functions seem to work sometime.

Please help me..hoe to achieve textboxes in a gridcell with aggrgate functionality for that datacolumn

  <telerik:GridViewDataColumn Header="Term Leased"  ToolTip="Term Leased" HeaderTextAlignment="Center" DataMemberBinding="{Binding TERM_LEASED}" IsReadOnly="False"  >
  <telerik:GridViewColumn.CellTemplate>
                                        <DataTemplate>
                                            <TextBox HorizontalAlignment="Center" VerticalAlignment="Top" Width="40" x:Name="TxtTermLeased" Margin="5,0" Text="{Binding TERM_LEASED}" >

                                            </TextBox>
                                        </DataTemplate>
                                    </telerik:GridViewColumn.CellTemplate>
                                    <telerik:GridViewDataColumn.AggregateFunctions>
                                        <telerik:SumFunction Caption="Term Leased: "  SourceField="TERM_LEASED" />
                                    </telerik:GridViewDataColumn.AggregateFunctions>
                                </telerik:GridViewDataColumn>
GridView
Vlad
Telerik team
 answered on 05 Oct 2009
7 answers
425 views
Number of Rows
Is there a practical limit to the number of rows in a GridView? I tried putting 4k in and get a memory exception. If I limit to 1k rows it works but I can see the system memory take a steep rise each time I refresh the grid. I have a similar application in WinForms and I can load 4k rows easily with no impact on system performance.
GridView
Hector
Top achievements
Rank 1
 answered on 02 Oct 2009
2 answers
389 views
Custom Item Template and Data Table Binding
I am attempting to create a Custom Item Template for my carousel that is bound to a datatable. The problem is that when I do the below XAML code, it displays System.DataRow.View or something like that instead of the actual data. I think it has something to do with not defining my data type. What should I put in the DataType property for my DataTemplate in the case that it is bound to a datatable?

<Grid.Resources> 
            <DataTemplate DataType="">  
                <Border Background="LightSlateGray" Padding="10">  
                    <Grid> 
                        <Grid.ColumnDefinitions> 
                            <ColumnDefinition Width="60" /> 
                            <ColumnDefinition Width="*" /> 
                        </Grid.ColumnDefinitions> 
                        <Grid.RowDefinitions> 
                            <RowDefinition Height="20" /> 
                            <RowDefinition Height="*" /> 
                        </Grid.RowDefinitions> 
                        <TextBlock Grid.Column="0" Grid.Row="0" Text="DocumentMasterID">  
                            <TextBlock.TextDecorations> 
                                <TextDecoration Location="Underline" /> 
                            </TextBlock.TextDecorations> 
                        </TextBlock> 
                        <TextBlock Grid.Column="0" Grid.Row="1" Text="{Binding Path=Data[DocumentMasterID]}" /> 
                        <TextBlock Grid.Column="1" Grid.Row="0" Text="CleanLeadsID">  
                            <TextBlock.TextDecorations> 
                                <TextDecoration Location="Underline" /> 
                            </TextBlock.TextDecorations> 
                        </TextBlock> 
                        <TextBlock Grid.Column="1" Grid.Row="1" Text="{Binding Path=Data[CleanLeadsID]}" /> 
                    </Grid> 
                </Border> 
            </DataTemplate> 
        </Grid.Resources> 
Carousel
Matt Tapia
Top achievements
Rank 1
 answered on 02 Oct 2009
5 answers
653 views
About SelectionChanged Event

Hi, I've been confused by a problem. First, I set RadGridView.ItemSource with a ObservableCollection and selected a row. Then I removed an item from ObservableCollection, the RadGridView.SelectedItem changed to null and did't trigger SelectionChanged Event. Is that by desgin? Thanks.

Version: Q2 2009.2.813.35

GridView
zai yunfeng
Top achievements
Rank 2
 answered on 02 Oct 2009
1 answer
150 views
SelectionChanged and MouseLeftButtonUp event
Hello,

Version: 2009.2.911.35 .

I defined three events:

RadGridView1_SelectionChanged
RadGridView1_MouseLeftButtonUp
RadGridView1_MouseUp

Because the "SelectionChanged" event, left click does not fire the other two events (only right click).

Is this by design ?

Thanks.

GridView
Milan
Telerik team
 answered on 02 Oct 2009
1 answer
67 views
Exporting GridView with columns created in code.

Hello,

I have a problem with exporting RadGridView using ToCsv() andToExcelML() methods.

While using AutoGenerateColumns property set to true everything works fine. 

However, when I'm trying to create columns in code in such a way:

  Telerik.Windows.Controls.GridViewDataColumn c1 = new Telerik.Windows.Controls.GridViewDataColumn();  
  c1.Header = "Name";  
  c1.CellTemplate = (DataTemplate)this.Resources["NameColumnTemplate"];  
  radGridView.Columns.Add(c1); 

with DataTemplate defined in XAML:

  <DataTemplate x:Key="NameColumnTemplate">  
  <TextBlock Text="{Binding Path=Name}"/>  
  </DataTemplate> 

In this case everything looks fine and RadGridView displays columns properly, but ToCsv() methods creates a string consist only of white spaces.

Is there any solution to this problem?

Regards

GridView
Vlad
Telerik team
 answered on 02 Oct 2009
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