Questions on UI for WPF Forum

1 answer

337 views

Need to customize Grid Header height in WPF (Material Theme)

Telerik Team,
In my project I have used material theme for the Telerik grid ( Xaml approach )and I want to adjust the height of header row. To achieve this If I Modify the height in common template, It will be applied to all the pages, Is there any way to modify the header height and header cell height specific to the page ?

If so, please let me know how to change the height. Thanks in advance

GridView

answered on 12 Oct 2022

1 answer

145 views

[Solved] Can I add 2 different Horizontal Scroll bars to two RadTimelines in the same view?

I have two radtimelines in a single WPF view can i add horizontal scrollbars for each of the timeline separately. Both the Timelines are inside the RadSplitContainer and inside a RadPaneGroup.

Slider

TimeLine

answered on 11 Oct 2022

1 answer

126 views

Disable filter for certain columns in Virtualgrid

Hi, I'm using a VirtualGrid with a CustomDataProvider. I want disable the filtering capabilities for certain columns removing also de funnel symbol in the header. How can I do that?

VirtualGrid

answered on 11 Oct 2022

1 answer

205 views

Integration of SyntaxEditor and Roslyn tool

Hi

Do you have an example on how to integrate the SyntaxEditor and the Roslyn toll:

Using C#

Want to:

- Compile and display errors

- Get list of functions and be able to navigate to functions

- etc.

/Brian

SyntaxEditor

answered on 11 Oct 2022

1 answer

174 views

How to apply theme to all controls automatically at design time?

The default design time theme is `office black`, is there any approaches to change default theme?

Set `telerik:StyleManager.Theme="xxx"` for each control is very troublesome.

Window

answered on 04 Oct 2022

1 answer

307 views

RadAutoSuggestBox with WPF MVVM

Hi All,

I am trying to explore RadAutoSuggestBox (R2 2022 SP1 version) in my WPF MVVM application however I didn't find any support, how to purely bind (TextChanged event and few others) it with my ViewModel. My requirement is: Whenever user type, I have to make API call and then bind response with control's itemsource.

Any help will be appreciated.

AutoSuggestBox

answered on 04 Oct 2022

6 answers

164 views

[Solved] Column groups and Office 2013 theme

Hello,
with the Office 2013 theme the column headers are in uppercase, but not the column group headers.
That doesn't look very pretty.
Patrick

GridView

answered on 04 Oct 2022

1 answer

296 views

[Solved] How to expand/collapse all the row details in a grid with a GridViewToggleRowDetailsColumn column?

I have a RadGridView with one of its columns being a GridViewToggleRowDetailsColumn to allow the operator to expand or collapse the selected row details.

Next to the grid I have a checkbox that I want to use to expand/collapse all rows details in a single click if needed.

I’ve managed to partially do it by using the following code, but the collapse doesn’t work unless I disable row virtualization which I cannot.

Does anyone have a solution to this problem?

        private void ToggleAllRowsDetails(object sender, RoutedEventArgs e)
        {
            if(DataContext is MyViewModel vm)
            {
                using (MyGrid.DeferRefresh())
                {
                    if (MyRowDetails.IsChecked.Value)
                    {                       
                        MyGrid.RowDetailsVisibilityMode = GridViewRowDetailsVisibilityMode.Visible;
                    }
                    else
                    {
                        MyGrid.RowDetailsVisibilityMode = GridViewRowDetailsVisibilityMode.Collapsed;                      
                    }
                }
            }
        }

GridView

answered on 03 Oct 2022

0 answers

146 views

Unsubscribe RadPropertyGrid CollectionEditor from INotifyCollectionChanged events

Hi.

I have the following RadPropertyGrid:

XAML:

<Grid
        behaviors:CalloutTagBehavior.CalloutTag="F6C90D8E-9F1C-4372-87D0-17B40EE1E462"
        IsEnabled="{Binding StateDispatcher.EnvironmentState,
                            Converter={converters:ComparisonConverter},
                            ConverterParameter={x:Static runtime:EnvironmentState.Design}}">
        <telerik:RadPropertyGrid
            x:Name="RadPropertyGrid"
            telerik:PropertySet.ShouldAddNullForNonMatchingValues="True"
            AutoGeneratingPropertyDefinition="RadPropertyGrid_OnAutoGeneratingPropertyDefinition"
            EditEnded="RadPropertyGrid_OnEditEnded"
            EditMode="Single"
            FieldIndicatorVisibility="Collapsed"
            IsGrouped="False"
            Item="{Binding SelectedObject}"
            LabelColumnWidth="0.8*"
            Loaded="RadPropertyGrid_OnLoaded"
            PropertySetMode="None"
            RenderMode="Flat">
            <telerik:RadPropertyGrid.GroupStyle>
                <Style TargetType="telerik:RadToggleButton">
                    <Setter Property="Margin" Value="0,0,15,0" />
                </Style>
            </telerik:RadPropertyGrid.GroupStyle>
        </telerik:RadPropertyGrid>
    </Grid>

CodeBehinde:

public partial class PropertyGridPaneUserControl : UserControl
{
    public PropertyGridPaneUserControl(IEventAggregator eventAggregator)
    {
        if (eventAggregator == null) throw new ArgumentNullException(nameof(eventAggregator));
        InitializeComponent();
        eventAggregator.Register<RefreshPropertyGridMessage>(this, RefreshPropertyGridMessageHandler);
    }

    private void RefreshPropertyGridMessageHandler(RefreshPropertyGridMessage message)
    {
        RadPropertyGrid.ReloadData();
    }

    private void RadPropertyGrid_OnAutoGeneratingPropertyDefinition(object? sender, AutoGeneratingPropertyDefinitionEventArgs e)
    {
        ((Binding)e.PropertyDefinition.Binding).ValidatesOnExceptions = true;
    }

    private void RadPropertyGrid_OnLoaded(object sender, RoutedEventArgs e)
    {
        var virtualizingStackPanel = RadPropertyGrid
            .ChildrenOfType<VirtualizingStackPanel>().FirstOrDefault();
        if (virtualizingStackPanel != null)
        {
            virtualizingStackPanel.ScrollOwner.HorizontalScrollBarVisibility = ScrollBarVisibility.Disabled;
        }
    }

    private void RadPropertyGrid_OnEditEnded(object? sender, PropertyGridEditEndedEventArgs e)
    {
        if (e.EditAction != PropertyGridEditEndedAction.Commit ||
            Equals(e.NewValue, e.OldValue) ||
            DataContext is not PropertyGridViewModel {SelectedObjects: { }} propertyGridViewModel) return;

        ItemPropertyInfo sourceProperty = e.EditedPropertyDefinition.SourceProperty;

        foreach (var selectedObject in propertyGridViewModel.SelectedObjects)
        {
            if (selectedObject == e.EditedPropertyDefinition.Instance) continue;

            PropertyInfo? property = selectedObject.GetType()
                .GetProperty(sourceProperty.Name, sourceProperty.PropertyType);

            if (property != null)
            {
                property.SetValue(selectedObject, e.NewValue);
            }
        }
    }
}

And it worked fine up to a certain point. The problem occurs when processing an object with the ObservableCollection property of the following type:

public class A
{
    public ObservableCollection<object> Collection { get; }
}

My task is to perform asynchronous addition of elements to a nested collection. If I didn't open the CollectionEditor in the UI, then the addition happens without problems. But if you open CollectionEditor in UI at least once, InvalidOperationnException is generated when adding asynchronously: The calling thread cannot access this object because a different thread owns it. Stack trace part:

 at System.Windows.Threading.Dispatcher.VerifyAccess()
  at System.Windows.DependencyObject.GetValue(DependencyProperty dp)
  at System.Windows.Controls.Panel.get_IsItemsHost()
  at System.Windows.Controls.ItemsControl.GetItemsOwnerInternal(DependencyObject element, ItemsControl& itemsControl)
  at System.Windows.Controls.Panel.VerifyBoundState()
  at System.Windows.Controls.Panel.OnItemsChanged(Object sender, ItemsChangedEventArgs args)
  at System.Windows.Controls.ItemContainerGenerator.OnItemAdded(Object item, Int32 index)
  at System.Windows.Controls.ItemContainerGenerator.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
  at System.Windows.WeakEventManager.ListenerList`1.DeliverEvent(Object sender, EventArgs e, Type managerType)
  at System.Windows.WeakEventManager.DeliverEvent(Object sender, EventArgs args)
  at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
  at System.Windows.WeakEventManager.ListenerList`1.DeliverEvent(Object sender, EventArgs e, Type managerType)
  at System.Windows.WeakEventManager.DeliverEvent(Object sender, EventArgs args)
  at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
  at MS.Internal.Data.CollectionViewProxy._OnViewChanged(Object sender, NotifyCollectionChangedEventArgs args)
  at Telerik.Windows.Data.QueryableCollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
  at Telerik.Windows.Data.QueryableCollectionView.ProcessSynchronousCollectionChangedWithAdjustedArgs(NotifyCollectionChangedEventArgs originalArguments, Int32 adjustedOldIndex, Int32 adjustedNewIndex)
  at Telerik.Windows.Data.QueryableCollectionView.ProcessSynchronousCollectionChanged(NotifyCollectionChangedEventArgs args)
  at Telerik.Windows.Data.QueryableCollectionView.ProcessCollectionChanged(NotifyCollectionChangedEventArgs args)
  at Telerik.Windows.Data.QueryableCollectionView.OnSourceCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
  at Telerik.Windows.Data.QueryableCollectionView.Telerik.Windows.Data.IWeakEventListener<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.ReceiveWeakEvent(Object sender, NotifyCollectionChangedEventArgs args)
  at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)

At the same time, an exception occurs even if in Rad PropertyGrid.Item set another instance of the object or null. I would like to know how to correct this misunderstanding

PropertyGrid

asked on 29 Sep 2022

0 answers

128 views

How dynamically change with of column in RowDetails

How dynamically change with of column in RowDetails

Hello. I have a TreeListView with three columns. Also some rows have details. There is a GridView in Details. I would like that width of the first column in Details is equals width of the first column in TreeListView, and so on for each columns. And when I change size of TreeListView the columns in Details dynamically change itself width.
Telerik SDK Samples Browser has demo "Binding RowDetails Element Width". But it's not working when I change size of window. Details does not change it's width.

Thanks.

TreeListView

asked on 29 Sep 2022