I have a rad Cartesian chart that updates live as data comes in, I have the render options set to Direct2D and seperate. I have tried bitmap/batch also and it seems to not make a difference. 

The problem is When the collection of data starts to reach around 20,000 datapoints the UI will completely freeze up although the code is still executing. 

I have a requirement to update live data up to 300,000 data points at a rate of 50HZ. Is this possible with your tools?

 WPF RadGrid copy multiple cell (non continuous ones like first and third). The second one is copied as empty. How to avoid this? Is there a property for setting this? The CellClipboardContent event is only fired twice though. 

Hi,
I've a RadComboBox inside the RadGridView. When loading the tab very first time data inside the combobox is not displaying.

We have data in selectedvalue and in itemsource collection, but it is not displaying. Combobox is in editable mode.
<telerik:RadComboBox x:Name="ComboBox" Tag="{Binding SeqNo,UpdateSourceTrigger=PropertyChanged}" Style="{StaticResource TextSearchStyle}" 
           ItemsSource="{Binding DataContext.List, Mode=TwoWay, RelativeSource={RelativeSource AncestorType={x:Type UserControl}, Mode=FindAncestor}}"
                SelectedValue="{Binding Code, Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" SelectedValuePath="Code"  IsEditable="True" ItemTemplate="{StaticResource ComboBoxItem}" ItemContainerStyle="{StaticResource ComboBoxItemStyle}"
                CanKeyboardNavigationSelectItems="True" TextSearchMode="Contains" IsFilteringEnabled="True"  OpenDropDownOnFocus="False" GotFocus="ComboBox_GotFocus" LostFocus="ComboBox_LostFocus" DropDownClosed="ComboBox_DropDownClosed"  GotKeyboardFocus="ComboBox_GotKeyboardFocus"
                IsTextSearchEnabled="True" KeyDown="ComboBox_KeyDown" PreviewKeyDown="ComboBox_KeyUp" CanAutocompleteSelectItems="False" TabIndex="7" >
                                                    <telerik:RadComboBox.ToolTip>
                                                        <StackPanel Height="Auto" Width="Auto" MaxWidth="300" Background="#F2F2F2">
                                                            <TextBlock Text="{Binding ShortDescription}" Style="{StaticResource ToolTipCodesDescriptionTextBlock}"/>
                                                        </StackPanel>
                                                    </telerik:RadComboBox.ToolTip>
                                                    <i:Interaction.Triggers>
                                                        <i:EventTrigger EventName="GotFocus">
                                                            <i:InvokeCommandAction Command="{Binding DataContext.LoadPopUpCommand, RelativeSource={RelativeSource AncestorType={x:Type UserControl}, Mode=FindAncestor}}" CommandParameter="{Binding DataContext, ElementName=ComboBox}" />
                                                        </i:EventTrigger>
                                                        <i:EventTrigger EventName="DropDownClosed">
                                                            <i:InvokeCommandAction Command="{Binding DataContext.CPTSelectionChanged, RelativeSource={RelativeSource AncestorType={x:Type UserControl}, Mode=FindAncestor}}" 
                CommandParameter="{Binding DataContext, ElementName=CPTComboBox}"/>
                                                        </i:EventTrigger>
                                                        <i:EventTrigger EventName="LostFocus">
                                                            <i:InvokeCommandAction Command="{Binding DataContext.ComboLostFocusCommand, RelativeSource={RelativeSource AncestorType={x:Type UserControl}, Mode=FindAncestor}}" CommandParameter="{Binding DataContext, ElementName=ComboBox}" />
                                                        </i:EventTrigger>
                                                    </i:Interaction.Triggers>
                                                </telerik:RadComboBox>
Regards,
Mahesh

Hi,

I have binded custom object collection to the RaCombobox selecting an item and saving is working fine but displaying the item again once we close and open the application is not working.

                    <telerik:RadComboBox Name="AppContextNames" Width="150" Height="25" SelectedItem="{Binding AppContext,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" ItemsSource="{Binding Path=DataContext.SharedActionVM.AppContextCollection,RelativeSource={RelativeSource AncestorType={x:Type telerik:RadTreeListView}}}" DisplayMemberPath="Name" />

Here while setting it is working fine but again if go to that combobox  even the AppContext object contains value it is showing empty combo value but combocollection is present.

Is there something I have to do from my side??

Regards,

Nagasree.

I'm currenting working on an existing project where there the creator had UserControl Xamls, the controls are in ViewModel folder where usercontrol.ViewModel.cs has the control and executable.

I'm trying not to break the code, learn how to use MVVM/WPF formatting.

I have added a button to the UserControl.Xaml now I'm not clear on get the button control to work so it can export both selected gridview item or the whole gridview. I have found several forum articles but they do not met my WPF format:

<telerik:RadButton x:Name="btnExport"
                                   Grid.Row="0"
                                   Content="Export to Excel"
                                   Command="{Binding Export2ExcelCommand}"
                                   Width="100"
                                   Margin="4" />

But now I need a good sample that show how I should add the "Export2ExcelCommand" button control to the "ucViewModel.cs" file.

Again the goal is to support both whole gridview export or selected items in gridview to Excel.

Help is appreciated.

Hi,

I have this RadMaskedTextInput:

Following implicit style is used

When running the application the slash (in the mask) is shown twice (see attached pictures). Any ideas why ?

Regards,
Hans

I seem to be having multiple issues with the current version (2019.3.1023.45) of the RadFileDialog (OpenFile, SaveFile, and RadFilePathPicker).

These are:

1. Selecting the "^" for parent directory causes a "Object Referencing Error"
2. Select "This PC" or "Network" just starts the spinning icon with out them opening (I have left this for a considerable time with no result)
3. Manually changing the directory string does no refresh the files list.
4. Setting the RestoreDirectory to True does not seem to work as this always revers to the user directory

Example of the code:

Dim dlg As New RadOpenFileDialog
dlg.DefaultExt = ".xml"
dlg.Filter = "XML|*.xml|All Files|*.*"
dlg.Owner = Me
dlg.RestoreDirectory = True
dlg.ShowNetworkLocations = True
dlg.ShowDialog()
If dlg.DialogResult = True Then

...

End If

Any suggestions would be appreciated?

I have created a chart with dynamically populated data that needs to hold thousands of data points.  For performance, I wanted to set the renderoptions on a lineseries to bitmap rendering instead of the default xaml rendering.  However, when switching to bitmap rendering, I lose the ability to set the strokeshapestyle on the line series.  It appears that the dashed line I was expecting to see is replaced with a solid line.  I knew that I would lose the ability to set the line thickness in bitmap rendering.  Do I also lose any ability to style the stroke of the line?

Thank you for any help you can provide.

Hi,

Some performance issue.
The 'Content' property of my RadPane holds a quite complex visual tree (let's say it contains RadGridView), and I add it to the Panes ObservableCollection.
I've implemented a custom DockingPanesFactory and only overrided the AddPane method. Not something special, it's almost like your example here:
http://docs.telerik.com/devtools/wpf/controls/raddocking/features/panes/panesource.html

I've noticed that adding of pane to the visual tree by Panes.Add(pane) that invoke the AddPane of the DockingPanesFactory takes something like 400ms.
Same for the Remove method. It's relevant also for DragStart when undocking this "heavy" pane, what happens is, the ToolWindow for this floating pane appears after a second or two, and the user holds the left mouse button down with no ToolWindow below the mouse cursor, and as I said only after 1-2 seconds the ToolWindow appears.

My Content property holds a ViewModel that has a DataTemplate targeted to it by "TargetType" property of the DataTemplate. The DataTemplate consist of a View that has a RadGridView ....

It's not reasonable that the whole pane appears only after its content added to the visual tree. I want to make the Pane to appear and let the content to load afterwards, Especially regarding the ToolWindow, because the user don't have any indication that the ToolWindow takes time to appear.

BTW, I've disabled the animations... you know, by....
<telerikDock:RadDocking telerik:AnimationManager.AnimationSelector="{x:Null}"
telerik:AnimationManager.IsAnimationEnabled="False">

Please, help me here to achieve my goal.
Thanks!!!

hi

i got this error "Object reference not set to an instance of an object." when i use "Example 1: Default UI" from https://docs.telerik.com/devtools/wpf/controls/radpdfviewer/default-ui

i find errors in this lines:

 telerik:RadPdfViewerAttachedComponents.RegisterSignSignatureDialog="True" telerik:RadPdfViewerAttachedComponents.RegisterFindDialog="True" telerik:RadPdfViewerAttachedComponents.RegisterSignaturePropertiesDialog="True" telerik:RadPdfViewerAttachedComponents.RegisterContextMenu="True"

but this lines hasn't problem in example for radviewer firstlook