Recently, when we enabled UI virtualization for RadTreeView in our application, our icons for the RadTreeViewItems disappeared.

We set the icons (DefaultImageSrc) in DataTrigger setters in a style, as follows:

This is with UI for WPF v. 2015.2.0401

It looks like this is the known bug described here and here.   That is, the problem is that DefaultImageSrc is non-functional in virtualized trees.

1) Can I get a confirmation that this bug is indeed causing our difficulty, please?  Is there anything else you see that would cause it?

2) It looks like you all have declined to fix this bug in the past.  Still declining? :)

3) I could recommend that the documentation for UI Virtualization with RadTreeView here be updated, please, to to include some very obvious notes, a) that enabling virtualization will disable DefaultImageSrc and ExpandedImageSrc (and any other TreeView features that don't work with virtualization?), and b) that workarounds are necessary.

Thanks!

-David

Hi! I develop Prism 6 WPF MVVM application. I defined an ObservableCollection instance in Model, please see below:

public class DeviceStatusModel
    {
        #region Constructors
        public DeviceStatusModel()
        {
            SeriesData = new ObservableCollection<short>();
            SeriesData.Add(20);
            SeriesData.Add(30);
            SeriesData.Add(50);
            SeriesData.Add(10);
            SeriesData.Add(60);
            SeriesData.Add(40);
            SeriesData.Add(20);
            SeriesData.Add(80);
        }
        #endregion

        #region Properties
        public ObservableCollection<short> SeriesData { get; set; }
        #endregion
    }

Then in ViewModel I defined the property of type of DeviceStatusModel. Please see below:

    public class DeviceStatusViewModel : BindableBase
    {
        #region Fields

        private DeviceStatusModel _deviceStatusModel;

        #endregion

        #region Constructors

        public DeviceStatusViewModel()
        {
            this.DeviceStatusModel = new DeviceStatusModel();
        }

        #endregion

        #region Properties

        public DeviceStatusModel DeviceStatusModel
        {
            get { return this._deviceStatusModel; }
            set { this.SetProperty(ref this._deviceStatusModel, value); }
        }

        #endregion
    }

Then in View I wrote the next XAML, please see below:

<UserControl x:Class="DeviceStatus.Views.DeviceStatusView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:prism="http://prismlibrary.com/"             
             xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"             
             prism:ViewModelLocator.AutoWireViewModel="True">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>

        <telerik:RadCartesianChart Grid.Row="1" Grid.Column="0" HorizontalAlignment="Left" Margin="6,7,0,0" VerticalAlignment="Top">
            <telerik:RadCartesianChart.HorizontalAxis>
                <telerik:LinearAxis/>
            </telerik:RadCartesianChart.HorizontalAxis>
            <telerik:RadCartesianChart.VerticalAxis>
                <telerik:LinearAxis/>
            </telerik:RadCartesianChart.VerticalAxis>
            <telerik:ScatterLineSeries ItemsSource="{Binding DeviceStatusModel.SeriesData}"/>
        </telerik:RadCartesianChart>

    </Grid>
</UserControl>

And eventually when aplication runs I see only next poor picture, please see "ChartViewScreenShot.PNG" file attached.

Hi!
Is there a way to _not_ enter the edit mode if the user changes the selected cell using the arrow keys or by pressing enter?
(Event if the user was in edit mode before). I want to get closer to the behavior of excel.

Alex

Hi,

I need to find out if a selected range is a merged cell. For a merged Cell the Property IsSingleCell is false.

In my application scenario I need to know whether the FromIndex-cell is part of a merged cell. If it is part of a merged cell, then I need to know which cells belong to that range since I need to handle them if it was a single cell. If it's not merged than I have to handle it as a range.

There's some documentation about how to do it with RadSpreadProcessing, but unfortunately not in the RadSpreadSheet. Though there's stated that merging is supported.

Thanks,

Michael

Hello,

when using the Office2013 theme, the control looks the same, whether IsReadOnly is set to True or False...