Hi:
I recently encountered a problem when using Edit Collections. I want to save the database immediately after editing Edit Collections.Is it possible to customize the Edit Collections template and add save buttons other than add and remove to achieve this?
Hi Telerik-team,
Is it possible to select what columns should be shown in the dropdown from the GridViewMultiColumnComboBoxColumn, like it is possible in the RadMultiColumnComboBox? I could not find any documentation on that.
Thank you in advance!
Greetings, Mats

There are currently issues with RadWindow minimization after the latest version of the 2019 R3 SP1.
It works correctly when minimized by the Minimize button.
But, Click the icon on the Task Bar in Windows to minimize it, and then press the same button again to return it to its original state.
Almost the entire area behaves like a transparent state.
Test)
Set to RadWindowInteropHelper.AllowTransparency="False"
All but the left-top part of the title bar will be invisible to the screen.
The above issue is the same for WPF Demo Application.
With SP1 in place, is there a temporary solution to this issue?
Good day!
I have a problem with determination of selected items when IsVirtualizing="True". In attached project I used two different ways to counting selected items: 1. With binding IsSelected property, 2. Just counting of treeview SelectedItems. And both are incorrect in situation when selecting some number of treeview items by clicking with Shift button (SelectionMode="Extended"). For example, I select more than 8000 items but received next: items with IsSelected = true property: 37, selected tree view items: 980
Link to download project sample: click

I have a exception when i try to filter the null value for the column, when having Null descriptor and other values as well. The binding is a dynamic object, i am setting the column type as expected.
I am using the version 2019.2.618.45 of telerik dll
Argument types do not match at System.Linq.Expressions.Expression.Constant(Object value, Type type) at Telerik.Windows.Data.Expressions.OperatorValueFilterDescriptorExpressionBuilderBase.CreateBodyExpressionThreadSafe() at Telerik.Windows.Data.Expressions.FilterDescriptorCollectionExpressionBuilder.CreateBodyExpressionThreadSafe() at Telerik.Windows.Data.Expressions.FilterDescriptorCollectionExpressionBuilder.CreateBodyExpressionThreadSafe() at Telerik.Windows.Data.Expressions.FilterDescriptorCollectionExpressionBuilder.CreateBodyExpressionThreadSafe() at Telerik.Windows.Data.Expressions.FilterExpressionBuilder.CreateFilterExpression() at Telerik.Windows.Data.QueryableExtensions.Where(IQueryable source, CompositeFilterDescriptorCollection filterDescriptors) at Telerik.Windows.Data.QueryableCollectionView.CreateView() at Telerik.Windows.Data.QueryableCollectionView.CreateInternalList() at Telerik.Windows.Data.QueryableCollectionView.get_InternalList() at Telerik.Windows.Data.QueryableCollectionView.get_InternalCount() at Telerik.Windows.Data.DataItemCollection.get_Count() at Telerik.Windows.Controls.DataControl.ItemCoerce(DependencyObject d, Object baseValue) at System.Windows.DependencyObject.ProcessCoerceValue(DependencyProperty dp, PropertyMetadata metadata, EntryIndex& entryIndex, Int32& targetIndex, EffectiveValueEntry& newEntry, EffectiveValueEntry& oldEntry, Object& oldValue, Object baseValue, Object controlValue, CoerceValueCallback coerceValueCallback, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, Boolean skipBaseValueChecks) at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType) at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal) at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value) at Telerik.Windows.Controls.DataControl.Telerik.Windows.Data.Selection.ISelectorInternal.set_SelectedItem(Object value) at Telerik.Windows.Data.Selection.ItemSelectionHandler.SynchronizePublicSelectedItem() at Telerik.Windows.Data.Selection.ItemSelectionHandler.SynchronizePublicPropertiesAndCleanUp() at Telerik.Windows.Data.Selection.ItemSelectionHandler.EndAllowedSelection(ItemSelectionChange selectionChange) at Telerik.Windows.Controls.GridView.Selection.CompositeSelectionHandler.PerformRowSelection(Object dataItem, SelectionModificationOptions modificationOptions) at Telerik.Windows.Controls.GridView.Selection.CellAndRowSelectionDispatcher.HandleSelectionForCellInput(GridViewCell cell, SelectionModificationOptions allowedModifications) at Telerik.Windows.Controls.GridView.GridViewDataControl.HandleMouseDownSelection(GridViewCell cell, Boolean allowDrag, Point mousePosition) at Telerik.Windows.Controls.GridView.GridViewCell.OnMouseLeftButtonDown(MouseButtonEventArgs e) 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.OnMouseDownThunk(Object sender, MouseButtonEventArgs e) 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.RaiseTrustedEvent(RoutedEventArgs args) 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, WindowMessage 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, Int32 numArgs) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
Hi Team,
We are
exporting our appointment details like below (code section) to generate .ics
file. When we book an appointment in our WOOFware
application, the email confirmation has an attached ICS file to add the
appointment to the client's calendar. The vcaappnt.ics attachment
itself is working correctly. However, if the client uses gmail,
there is a banner at the top that allows them to add that ics to their Google calendar.
Issue: When the appointment is close to a daylight savings time, the google calendar option is adding the appointment 1 hour later than the appointment. Please see the below,
Appointment time - Oct
31 @6 PM – 6.15PM EDT. But, in google it shows as 4.30am – 4.45am IST instead
of 3:30am-3.45am IST. (please see the attachment - IST Time format)
Appointment time - Oct
31 @6 PM-6.15 PM EDT. But, in google it shows as 4pm – 4.15pmIST instead of 3pm-3.15pm
IST.(please see the attachment - PDT Time format)
Code
using Telerik.Windows.Controls.ScheduleView;ICalendar.AppointmentCalendarExporter exporter = new ICalendar.AppointmentCalendarExporter(); // appointment details exported(included timezone, location,time etc...) exporter.Export(appointments, sw);The time zone will be PDT, EDT, CDT – and it
will erroneously add 1 hour to the appointment(.ics file) and the time
zone will say PST, EST, CST and it will
show the correct time
The actual .ics file is being generated using a Telerik
library. That’s the one that is creating these RRULE entries in the .ics file.
So, different time gives in google and outlook using this .ics file? How to
resolve this ?
Thanks,
Srinivasan
Hi,
I want to override the select all filtering in radgridview to avoid stack over flow exception as mentioned below
https://docs.telerik.com/devtools/wpf/controls/radgridview/filtering/faq/stackoverflow-exception
https://docs.telerik.com/devtools/wpf/controls/radgridview/filtering/how-to/howto-display-all-distinct-values
Is there a way I can create custom list and change the item source?

Hi!
I am using a pivot grid, with a PivotFieldsList, and would like to be able to allow the user to choose a custom column name when hey are setting up there table. Whilst I can set the name correctly from the backend: I was hoping to allow someone to set the name from the drop down box. I have attached a *rough* image to demonstrate what I am trying to achieve.
Thanks for your help!