Is there a way to accomplish loading data on demand with WPF GridView?
That means gridview should ask me how much DataItems to render to show an appropriate scrollbar.
Then when you scroll dataitems into view,  GridView fires an event, where in I can load only that data that is visible.
I not only need UI virtualization but rather data virtualization.
If not, does GridView support paging like asp.net Gridview?

Hi,

I've update to the last version but now i have 2 problems with it

1. When i get the gridviewcell from a dependancy object and then try to get the field property (what existed in the previous versions), it doesn't exist anymore ? (the code comes from a datacombo selection changed in the grid)
   

   DependencyObject item = e.OriginalSource as DependencyObject;

   while (!(item is GridViewCell))

   {

   item = VisualTreeHelper.GetParent(item);

   }

   if ((sender as ComboBox).SelectedItem != null)

   {

   PrinterTray p = (sender as ComboBox).SelectedItem as PrinterTray;

   QueueItem q = ((item as GridViewCell).Field.Record as DataRecord).Data as QueueItem;

   q.SetPrinterTrayKeys(p.ReportServiceId, p.PrinterId, p.PrinterTrayId);

   }

2. When i add a column that is set to a nested object then it doesn't work anymore (worked fine in the previous versions) but now it doens't display anything. (QueueItem.Status.StatusId)

   <telerik:GridViewDataColumn Width="Auto" DataType="{x:Null}" HeaderText="StatusId" UniqueName="QueueItem.Status.StatusId" />

 

Dear All

I would like to request a feature where you can set a minimum date and a maximum date on the DatePicker control. Ideally this would be a dependency property so that you could bind to it.

there is a bug in drag/drop within the treeView.
here's the scenario:

-A
--B
---C

each letter is a RadTreeViewItem. A is root, B is a child of A, C is a child of B.

Now, A.IsDropAllowed=true, B.IsDropAllowed=False,

I want to move C before B, thus making it a child of A. BUT when the line indicator shows that the item will be dropped "Before B" the tooltip shows up as (X), and does not allow the drop.

Setting a dropTarget to isDropAllowed=False should mean you cannot drop it under that item. If i want to add something before or after it, it should use the isDropAllowed of that item's parent.

Version: Q2 2008 SP1- Released:9/10/2008 - WPF/VS2008-SP1

 

We're able to edit an existing record, but couldn't successfully include a record into the GridView. Our data is stored in a List<T> which is used to commit each record to the backend.

 

Pressing the INSERT key on the GridView will call the 'AddingNewDataItem' method.  When the cursor leaves the edited row, the 'EditEnded' method is called.  When this method executes to the end, an error occurs:

 

ERROR: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index

STACK TRACE: at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)

   at System.ThrowHelper.ThrowArgumentOutOfRangeException()

   at System.Collections.Generic.List`1.get_Item(Int32 index)

   at Telerik.Windows.Data.Grouping.DataRecordStore`1.GetDataRecord(Int32 index)

   at Telerik.Windows.Data.Grouping.ListOfRecordsExtensions.InsertIndex[TElement](IList`1 recordList, Int32 insertionIndex, Int32 dataSourceIndex, DataRecordStore`1 recordStore)

   at Telerik.Windows.Data.RecordTreeBuilder`1.InsertRecordInGroup(IList`1 dataRecordList, TElement dataItem, Int32 index)

   at Telerik.Windows.Data.RecordTreeBuilder`1.AddExistingDataRecord(IList`1 targetCollection, TElement dataItem, Int32 index)

   at Telerik.Windows.Data.RecordTreeBuilder`1.AddNewDataRecord(IList`1 targetCollection, TElement dataItem, Int32 index)

   at Telerik.Windows.Data.RecordTreeBuilder`1.AddNewRecord(IList`1 targetCollection, Object recordItem, Int32 index)

   at Telerik.Windows.Data.RecordManager.AddNewRecord(Object recordItem, Int32 index, String fieldName)

   at Telerik.Windows.Controls.GridView.GridViewRow.UpdateDataRecords(DataRecord changedRecord, String changedFieldName, RecordsChangeListener changeListener)

   at Telerik.Windows.Controls.GridView.GridViewRow.HandleValueChangedWithoutNotifications(DataRecord changedRecord, String changedFieldName, RecordsChangeListener changeListener)

   at Telerik.Windows.Controls.GridView.GridViewRow.HandleValueChangedAfterEdit(FieldRoutedEventArgs editEventArgs, RecordsChangeListener changeListener)

   at Telerik.Windows.Controls.GridView.GridViewRow.Cell_EditCommitted(Object sender, FieldRoutedEventArgs e)

   at Telerik.Windows.Controls.GridView.GridViewRow.CommitEdit()

   at Telerik.Windows.Controls.GridView.GridViewCell.CommitEditedRow()

   at Telerik.Windows.Controls.GridView.GridViewCell.TryCommitPreviousEdit()

   at Telerik.Windows.Controls.GridView.GridViewCell.HandleLostFocus()

   at Telerik.Windows.Controls.GridView.GridViewCell.OnGotFocus(RoutedEventArgs e)

   at System.Windows.UIElement.IsFocused_Changed(DependencyObject d, DependencyPropertyChangedEventArgs e)

   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)

   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)

   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)

   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, OperationType operationType)

   at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, OperationType operationType, Boolean isInternal)

   at System.Windows.DependencyObject.SetValue(DependencyPropertyKey key, Object value)

   at System.Windows.Input.FocusManager.OnFocusedElementChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)

   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)

   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)

   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, OperationType operationType)

   at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, OperationType operationType, Boolean isInternal)

   at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)

   at System.Windows.Input.FocusManager.SetFocusedElement(DependencyObject element, IInputElement value)

   at System.Windows.Input.KeyboardNavigation.UpdateFocusedElement(DependencyObject focusTarget)

   at System.Windows.FrameworkElement.OnGotKeyboardFocus(Object sender, KeyboardFocusChangedEventArgs e)

   at System.Windows.Input.KeyboardFocusChangedEventArgs.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.KeyboardDevice.ChangeFocus(DependencyObject focus, Int32 timestamp)

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

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

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

   at System.Windows.Input.Keyboard.Focus(IInputElement element)

   at Telerik.Windows.Controls.GridView.GridViewCell.OnMouseLeftButtonDown(MouseButtonEventArgs e)

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

   at System.Windows.UIElement.CrackMouseButtonEventAndReRaiseEvent(DependencyObject sender, MouseButtonEventArgs e)

   at System.Windows.UIElement.OnMouseDownThunk(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)

   at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)

   at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)

   at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)

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

   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)

   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)

   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)

   at System.Windows.Threading.Dispatcher.Run()

   at System.Windows.Application.RunDispatcher(Object ignore)

   at System.Windows.Application.RunInternal(Window window)

   at System.Windows.Application.Run(Window window)

   at System.Windows.Application.Run()

 

Record editing is working, but crashes when committing a new record.  Secondly, is it possible to call the 'AddingNewDataItem' method rather than wait for the user to press the INSERT key?

 

-Trav.

Should be a simple question....  How do I change the background color of a chart?

These don't seem to do it for me:

this

 

.RadChart1.Background = new SolidColorBrush(Colors.Blue);

 

this

 

.RadChart1.DefaultView.ChartArea.Background = new SolidColorBrush(Colors.Black);

The only way I have done it so far is to override the whole control template, and set the Background on the WrapPanel....which is very much over-kill.  I must be missing something obvious.  If you want to change the background color of a control, you usually just set the Background property...

Michael

 

We would like to welcome you to the Telerik RadControls for WPF and RadControls for Silverlight Early Adoption Program!

As part of the Early Adoption Program we would like to reward all community members who are eager to try our newest products – RadControls for Silverlight and/or RadControls for WPF. Your feedback and feature suggestions will be instrumental in helping us further develop the products so that they meet your requirements.  Your ideas and suggestions will be rewarded according to the scheme below:

• Bug Report – 1000-2000 Telerik points
• Feature Request – depending on how valuable the feature request is and whether it can be implemented or not – 500 – 2000 Telerik points
• Showcase example –a real-life example showing the usage of our RadControls for Silverlight/RadControls for WPF. All we need is just an URL pointing to an application or screen-shots/source code demonstrating the usage of the controls – 1000-5000 Telerik points
• General Feedback – 500-1500 Telerik points

Telerik points will be updated in your Client.NET accounts and you will receive a separate e-mail once Telerik points are added for your feedback. You can use the accumulated Telerik points as a discount for future purchases of RadControls for Silverlight, RadControls for WPF or another Telerik product. 100 Telerik points equal $1 discount on Telerik products.

For those of you who are most active and submit the most valuable feedback, we also have additional prizes - three $100 Amazon Gift Coupons!

The Early Adoption Program will be open until November 1, 2008. Your product suggestions and ideas are highly appreciated!

Hello

I know this is going to sound stupid, but I was wondering if anyone could explain in a simple walkthrough on how to use the RadPanel Bar in Microsoft Expression Blend 2.

I'm a super noob as you can tell.  thank you in advance

Dear All

I've just spent a while trying to get a hand-authored theme (basically identical to SimpleTheme, but in my assembly) to work with the grid, but without success.

I can reference the SimpleTheme class in Telerik.Windows.Controls.UI.Simple and my grid reflects this theme, but if I copy the theme into my project (after fixing up namespaces etc.) and setting the Theming.Theme attached property on the grid to point to my derived class of Theme, I end up with a completely blank grid.

I have two ideas as to why this is happening:
- Assemblies containing themes authored by Telerik are signed with a strong name key
- The syntax I am using to set up the ThemeResourceKey that points a particular style at a particular part of the grid is incorrect.  The following example is from Telerik code:

x:Key="{telerik:ThemeResourceKey ThemeType=telerik:SummerTheme, ElementType=grid:GridViewItemsControl}"

and I'm a bit surprised that ThemeType is assigned like this using just a string.  I've done the same, using the namespace of the class I have which is derived from Theme, but without success.

Can you provide us with a step-by-step guide to hand authoring themes for the Grid, or is this currently not possible?

In the meantime, we are going to continue styling the grid without unifying this into a Theme.

Regards

Chris