On my development, each navigationView Item will display a page which is defined by an User control. When user click items on left-hand side, corresponding page is displayed on right-hand side.

Now considering following case:

• User is working on a page (let's call it GRID page) which shows a few grids and some input editors. User rearranges columns of a grid; user selects a few rows of a grid; user inputs some texts on editor
• User clicks another NavigationView item to look for some information on another page;
• User switches back to GRID page, and he will discover that all the changes he just made are gone. Every thing goes back to initial state.

Debugging told me that the user control of GRID page is re-created whe user switched back to GRID page

My questions:

1. Instead of destroying/creating pages, is that a way to hide/show pages when use switch pages?
2. If this is impossible, how can I perserve the status of a page so that user can go back and continue working on it.

Thanks.

I need to pass multiple values into the i value converter but since multibinding isn't an option for DataMemberBinding I decided to pass the whole type into the converter as seen below: (I tried to only put the relevent code here)

                <telerik:GridViewDataColumn Header="{x:Static properties:Resources.Value}" DataMemberBinding="{Binding Converter={StaticResource myConverterSelector}}" TextAlignment="Center" HeaderTextAlignment="Center"  DataType="{x:Type sys:Double}" UniqueName="Value">

        public class MyConverterSelector : IValueConverter
    {
        public object Convert(object item, Type targetType, object parameter,
            System.Globalization.CultureInfo culture)
        {
            TabularTag tag = item as TabularTag;
            if (tag != null)
            {
                if (tag.Format == "Float" || tag.Format.Contains("REAL") || tag.Format == "")
                {

                    double parsedVal;
                    if (Double.TryParse(tag.Value.ToString(), out parsedVal))
                    {
                        return parsedVal.ToString("f3", CultureInfo.InvariantCulture);
                    }
                }
                else
                {
                    double parsedVal;
                    if (Double.TryParse(tag.Value.ToString(), out parsedVal))
                        return parsedVal.ToString("f0", CultureInfo.InvariantCulture);
                }
            }
            return null;
        }

        public object ConvertBack(object item, Type targetType,
            object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotSupportedException();
        }
    }

This works great on the cell data but the filter for this column ends up empty (I attached a snapshot of this) I tried using CellTemplate instead to edit the data but this doesn't affect the filter, which needs to match.

Hello, I want to use WebBrowser in RadWindow. I know that I need to set AllowTransparency="False". With Fluent theme it works good but with Crystal theme it looks ugly. I tried to set CrystalPalette.Palette.CornerRadius = new CornerRadius(0) but there is still some border around window. How to make it fill all the window like in some other theme like Fluent?

Hi,

I'm trying to get a simple test app up and running with the following functionality:

A main window with an empty docking container.

A dockable view pane that is created on the fly.  (Where multiple panes are created as needed.)

So far I have this for my main window:

And this for my dockable pane:

Where my main window is a <Window> and my view is a <UserControl>.

This gives me an empty window, and I can create views through the main window's main menu.  The views are created and docked as follows:

Which gives me almost what I want - the views are created and docked in the main window by default.  (The text on the tab is missing, but I can figure that out later.)  The problem I am having now is any attempt to undock one of those views by dragging its tab results in a crash with the following callstack:

The output window of Visual Studio has the following (extremely unhelpful) message:

An unhandled exception of type 'System.ArgumentNullException' occurred in PresentationFramework.dll
Additional information: Value cannot be null.

So, I'm wondering what it is I'm missing, or does the WPF docking library not support creating views dynamically?  (All the samples and examples I've seen do only seem to build static GUIs where all the components are known at compile time.)

Regards,

James

Hello,

I need some assistance identifying one last piece that I would like to remove.  I'm not really sure what this is (I'm new to Telerik), so I included a screenshot.  Whatever this is, it can be dragged to each of the columns.  I would like to remove it.

Thanks!

Hi Telerik,

I'mu using a base class with all proerties which are overridable :

I have 2 classes A & B which inherit of SelectionDetailItemViewModel. A class has children of type of A & B.

The ItemSource is bound to a ObservableCollection(Of SelectionDetailItemViewModel). For each column, the filter panel has all column values but select a value doesn't filter the RadTreeListView. There the following error :

System.Windows.Data Error: 8 : Cannot save value from target back to source. BindingExpression:Path=IsActive; DataItem='DistinctValueViewModel' (HashCode=63240628); target element is 'CheckBox' (Name=''); target property is 'IsChecked' (type 'Nullable`1') ArgumentException:'System.ArgumentException: La valeur "((Name IsEqualTo er 2d2 MC)) AND ((Name IsEqualTo <Unset>) AND (Name IsEqualTo <Unset>))" n'est pas de type "Telerik.Windows.Data.IFilterDescriptor" et ne peut pas être utilisée dans cette collection générique.
Nom du paramètre : value
   à System.ThrowHelper.ThrowWrongValueTypeArgumentException(Object value, Type targetType)
   à System.Collections.ObjectModel.Collection`1.System.Collections.IList.Insert(Int32 index, Object value)
   à Telerik.Windows.Data.CollectionHelper.Insert(IList target, IEnumerable newItems, Int32 startingIndex, IEqualityComparer itemComparer)
   à Telerik.Windows.Data.ObservableCollectionManager.HandleCollectionChanged(IList sender, NotifyCollectionChangedEventArgs args)
   à Telerik.Windows.Data.ObservableCollectionManager.Telerik.Windows.Data.IWeakEventListener<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.ReceiveWeakEvent(Object sender, NotifyCollectionChangedEventArgs args)
   à Telerik.Windows.Data.WeakEvent.WeakListener`1.Handler(Object sender, TArgs args)
   à System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
   à System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
   à Telerik.Windows.Data.RadObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
   à Telerik.Windows.Data.ObservableItemCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
   à System.Collections.ObjectModel.ObservableCollection`1.InsertItem(Int32 index, T item)
   à Telerik.Windows.Data.RadObservableCollection`1.InsertItem(Int32 index, T item)
   à Telerik.Windows.Data.FilterDescriptorCollection.InsertItem(Int32 index, IFilterDescriptor item)
   à System.Collections.ObjectModel.Collection`1.Add(T item)
   à Telerik.Windows.Controls.GridViewColumn.OnColumnFilterDescriptorPropertyChanged(Object sender, PropertyChangedEventArgs e)
   à Telerik.Windows.Data.DescriptorBase.OnPropertyChanged(PropertyChangedEventArgs args)
   à Telerik.Windows.Data.DescriptorBase.OnPropertyChanged(String propertyName)
   à Telerik.Windows.Data.DescriptorBase.ResumeNotifications()
   à Telerik.Windows.Controls.GridView.FilteringViewModel.ApplyFilters()
   à Telerik.Windows.Controls.GridView.FilteringViewModel.OnDistinctValuesChanged()
   à Telerik.Windows.Controls.GridView.FilteringViewModel.OnDistinctValuesItemChanged(Object sender, ItemChangedEventArgs`1 e)
   à Telerik.Windows.Data.ObservableItemCollection`1.RaiseGenericItemChanged(ItemChangedEventArgs`1 e)
   à Telerik.Windows.Data.ObservableItemCollection`1.OnItemChanged(ItemChangedEventArgs`1 e)
   à Telerik.Windows.Data.ObservableItemCollection`1.Telerik.Windows.Data.IWeakEventListener<System.ComponentModel.PropertyChangedEventArgs>.ReceiveWeakEvent(Object sender, PropertyChangedEventArgs args)
   à Telerik.Windows.Data.WeakEvent.WeakListener`1.Handler(Object sender, TArgs args)
   à System.ComponentModel.PropertyChangedEventHandler.Invoke(Object sender, PropertyChangedEventArgs e)
   à Telerik.Windows.Controls.ViewModelBase.OnPropertyChanged(String propertyName)
   à Telerik.Windows.Controls.GridView.DistinctValueViewModel.set_IsActive(Boolean value)'

Have you got any idea ?

Thanky you.

The data binding of the RadRichTextBox does not work. What am I wrong about?

Document Class:

RadRichTextBox in XAML:

Assignment of the DataContext:

Hi,

I tacked this message onto an old thread and realized, 3 days later, that might not be the wisest course. Hi Martin,

Just updated my VS to the Net Core 3.0 release. Also updated Telerik. But I cannot get the Telerik Controls to show up in the toolbox when I create a Core project, despite following the installation instructions including manual installation. Note, everything works fine if I create a .NET Framework project

Any thoughts?

Wayne