I'm encountering an exception when I call Application.Current.Shutdown in my app. The exception is:

Message
"Cannot set Visibility to Visible or call Show, ShowDialog, Close, or WindowInteropHelper.EnsureHandle while a Window is closing."

Stacktrace

For what it's worth, this app uses Prism and this is a call made via an ICommand on the Shell's viewmodel. As such:

ShellViewModel.cs (snippet)

Without over-complicating matters, the CanClose property is implemented by each screen in the application and will raise a RadWindow dialog prompting for confirmation if there are changes on that screen. Based on our implementation, all of that prompting should be complete before the Application.Current.Shutdown is called so we're not sure what's happening and we can't seem to catch this exception anywhere. It feels like it might be a race condition, but we're not sure where.

Any ideas?

Greg

I am using dynamic layers to retrieve data depending on the zoom level and it's working great. However, the user would like to be able to hide certain map pins by checking a show/hide checkbox on the form.

Is it possible to hide items on a dynamic layer? Or even set the visibility of the layer?

I did think about refreshing it's datasource but I cannot find a way to force the map to rebind, I could move the map center programmatically which would cause the ItemsRequest to fire but that seems like a hack.

Is there a way to force a rebind of the data or hide the pins?

Many thanks,
Mark

Hello!
  I set the property of IsEditable to the TreeViewItem,but it not work,the code:
why the header=2222222,press F2 not work?

Hello,

i would like to use the WPF Richtextbox to display some "News" inside our Application.
This News can be different in size, so i need to split the text to different pages, like in Layoutmode "paged".
But also i would like to display only one page at once.
--> Show Page 1 , Blendover, Show Page 2

The best wold be if i can get the different Pages without this "Page" Style around.

So in short:

I need the Documentsplitting from Paged layoutmode, and the clean View from Flow layoutmode, and get / scrollto the different Pages.

I hope you can give ne an Idea how to perform this.

Best Regards,

Michael Rummel,
heinekingmedia GmbH

I was having a problem, and was going to post asking for help, but I figured it out. And then thought I might post about the problem I ran into, and the solution, in case someone else runs into it.

I have a user control that contains a RadDataForm and a RadGridView, both of which have their ItemsSource properties bound to a QueryableCollectionView that is wrapped around an ObservableItemCollection.

And I have a "New" button that is bound to a command that calls RadDataForm.AddNewItem().

The objects in the collection were instances of a ORM record class, and the fields in the form and the the grid were bound to properties of the record class, and all was well and good.

Until I decided that I needed to add additional validation. I couldn't modify the record class - it is shared across several projects - so I did what I have often done, I defined a new wrapper class. The constructor for the new wrapper class took a an instance of the record class as an argument, and exposed it as a property (and also exposed the additional functionality I needed.)

So I modified the collection to contain instances of this wrapper class, and modified the bindings to properties of the record class property of the wrapper, instead of to properties of the record class itself.  And then ran the program to see how it would do.

The grid displayed fine, and the form viewed existing records fine. But when I clicked my "New" button, AddNewItem() returned false.

This confused me. I could see how this would happen, if ItemsSource was bound to a fixed-size array, but I should be able to insert new items into a ObservableItemCollection.

The problem turned out to be the constructor of the wrapper class. It seems the element type in the collection must have a zero-argument constructor. Once I added this, everything worked again.

My scenario is fairly simple: I have a grid bound to a VirtualQueryableCollectionView that is loaded with DataRows. Each DataRow has a column containing an integer value for a color that I need to convert to a SolidColorBrush. I'm specifying the RadGridView.RowStyle and an IValueConverter to achieve the setting of the row background. The problem I'm seeing is that my converter is only called one time with a row that actually contains a DataRow for it's 'Item' property. That single call is for the row just out of view in the grid. None of the visible rows before it contain a DataRow as their GridViewRow.Item.

Here is my style attached to the grid:

<telerik:RadGridView.RowStyle>
                <Style TargetType="telerik:GridViewRow">
                    <Setter Property="Background">
                        <Setter.Value>
                            <Binding RelativeSource="{RelativeSource Self}" Converter="{StaticResource DataGridRowBackgroundConverter}" ></Binding>
                        </Setter.Value>
                    </Setter>
                </Style>
            </telerik:RadGridView.RowStyle>


And here is the converter code. Note the comment on line 4:

public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var gridViewRow = (GridViewRow)value;
            var dataRow = gridViewRow.Item as DataRow;  // This is only true for a single row in the grid!
            if (dataRow == null) return new SolidColorBrush(Colors.Transparent);

            var integerValue = dataRow.Field<int>(DataSourceConstants.ColorColumnName);
            if (integerValue == 0)
            {
                return new SolidColorBrush(Colors.Transparent);
            }

            var bytes = BitConverter.GetBytes(integerValue);
            var color = Color.FromArgb(bytes[3], bytes[2], bytes[1], bytes[0]);

            return new SolidColorBrush(color);
        }



What could I be doing wrong here?

Hello!
the project as the attach picture. When I click on the Create button continuously to creat document,after that, I press F2 to edit documents created, the results of the edit box is empty,why? the problem as the 3.png of the attach file. But after I created the file, use the mouse to click in the edit box next to,as the 1.png attach file, There is no the problem. The mouse does not click elsewhere, always click the Create button, Is previously created file will be the CancelEdit ()?

the xaml code:
When I create the new document, I will set the IsInEditMode=true, and I use MVVM

<UserControl.Resources>

<DataTemplate x:Key="childrenDocument">

<StackPanel Orientation="Horizontal">

<Image Width="24" Height="24" Source="/Fujitsu.iDM.View.Impl;component/Icons/128/image-folder.png"></Image>

<TextBlock Text="{Binding Name, Mode=TwoWay}" />

</StackPanel>

</DataTemplate>

<HierarchicalDataTemplate x:Key="rootDocument" ItemsSource="{Binding Mode=TwoWay, Path=ChildrenDocuments}"

ItemTemplate="{StaticResource childrenDocument}">

<StackPanel Orientation="Horizontal">

<TextBlock Text="{Binding Name, Mode=TwoWay}"/>

</StackPanel>

</HierarchicalDataTemplate>

<Style x:Key="treeViewItemStyle" TargetType="telerik:RadTreeViewItem">

<Setter Property="IsInEditMode" Value="{Binding IsInEditMode, Mode=TwoWay}" />

<Setter Property="IsSelected" Value="{Binding IsSelected}" />

<Setter Property="IsExpanded" Value="true" />

</Style>

</UserControl.Resources>

<StackPanel>

<telerik:RadTreeView x:Name="radTreeNav" PreviewSelectionChanged="RadTreeView_PreviewSelectionChanged" IsEditable="true" FontWeight="Normal"

SelectedItem="{Binding NavBarSelectedDocument, Mode=OneWayToSource}" ItemContainerStyle="{StaticResource treeViewItemStyle}"

IsLineEnabled="True" ItemTemplate="{StaticResource rootDocument}" ItemsSource="{Binding RootDocuments}" >

<telerik:RadTreeView.ItemEditTemplate>

<DataTemplate>

<StackPanel Orientation="Horizontal">

<Image Width="24" Height="24" Source="/Fujitsu.iDM.View.Impl;component/Icons/128/image-folder.png"></Image>

<TextBox Text="{Binding Path=Name, Mode=TwoWay}"/>

</StackPanel>

</DataTemplate>

</telerik:RadTreeView.ItemEditTemplate>

</telerik:RadTreeView>

</StackPanel>

Hello Telerik team!.
I have 2 problems with radchart (currently i'm using Telerik.Web.UI version 2012.3.1016.35 with SharePoint 2013).
Users will be asked a survey question and choose their answers then click "Vote" button after that the radchart (Pie chart) will be display results.
Here is my issues: 
1. The rad chart always keep the previous results. If i pressed Ctrl + F5 or F5  the new results is updated. It only happened on IE 9 (good working on IE 8).
2. When anynomous user answer survey question, the radchart can't display and i received error:
'The Visible property cannot be set on Web Part 'g_49646826_5f92_4fb2_9e3a_e5059f7fcbe5'.  It can only be set on a standalone Web Part.'
I googled and found some instruction links how to fix, it's related to webpart property (Webpart.Visible=false, ...) but i didn't use it in my code.
Can anyone help me how to fix this!?
Thanks in advance!.

I would like to create a line series graph that does not interpolate between points: I've been told by the quants and traders that this is called a Manhattan bar plot.

I've attached a mock up of such a graph.I can get the current RadChartView to create this effect by inserting a duplicate data points

i.e.:
DataPoint(Time: 07:00, Price: $101.10) <-- previous price
DataPoint(Time: 08:00, Price: $101.10) <-- Duplicate inserted to prevent interpolation
DataPoint(Time: 08:00, Price: $111.10) <-- New price

The problem with inserting the dummy points is that is doubles the size of the data structure bound to the graph.

I took a look at the samples but didn't see anything about customizing the behavior of the LineSeries. Note we use the light renderer because we have a very large data set.
It seems like 

BitmapLineRenderer.RenderCore()in Telerik.Windows.Controls.ChartView.

Is where the current interpolation is carried out?

Hi guys!

I have gridview with custom defined style for it's children. But when I set up cellvalidating | rowvalidating event, it's not fire up! Why??

GridView xaml:


P.S. I am not using these events here in this xaml. IS there any work around?

Thank you,
Ihor.